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control-

1500B Single Axis Antenna Controller Appendix E Communications Protocol 

82

A C program has been written which allows a user to exercise the

 control-

1500.  The program runs

on an IBM PC (or compatible - running DOS) and was designed to aid the software developer
who is writing programs to control the 

control-

1500.  All of the commands listed above can be sent

to the controller.  The program features three windows.  In the top window the user is
prompted for commands to send to the controller.  In the middle window, the command strings
sent to the controller are displayed.  The bottom window displays all characters received from
the controller.  The source code is included with the program and a developer may examine
and freely use any of the routines.  A disk containing this program is included with each
controller.

MESSAGE DELIMITERS

Here are the delimiters used with SA bus messages, along with their value in hex and decimal.

ASCII name

hex value

decimal value

STX

2

2

ETX

3

3

ACK

6

6

NAK

15

21

DAWNco • 3340 S. Lapeer Rd • Orion, MI 48359-1320 • Ph (248) 391-9200 • Fax (248) 391-9207 • [email protected]

Содержание CONTROL-1500A

Страница 1: ...able speed with varying load Solid State Drive Circuitry Provides reliable quiet operation rated at 5A with over current protection Multi Band Operation Supports C Ku and L band satellites F E A T URES Re m ote Co n trolle d A n te n n a Co n troller for Sin gle A xis A n te n n as CONTROL 1500A Specs pg1 2 Manual on pg3 3340 S Lapeer Rd Orion MI 48359 1320 Ph 248 391 9200 Fax 248 391 9207 sales D...

Страница 2: ...ellite with an inclination of 5 degrees If the antenna beamwidth is larger than the width of the figure 8 it can track the satellite with single axis declination motion An 11 5m C band or an 3 8m Ku band antenna would have a 3dB beamwidths of about 0 6 degree Properly aligned these antennas could track the satellite with less than 3dB error The tracking algorithm used by the RC2000 antenna control...

Страница 3: ...turer s limited express warranty if any that accompanies the product DAWNco makes no additional or independent warranty All other warranties express or implied including the warranties of merchantability and fitness for a particular purpose are disclaimed We do our best to be accurate We are not responsible for any typographical photographic or technical errors See Policies for DAWNco under the An...

Страница 4: ...tion 12 3 2 1 Antenna Motor Drive 13 3 2 2 Position Sense 14 3 3 Polarization Control 17 3 3 1 Configuring the CONTROL 1500A for Use in an Installation that Does Not Employ a Polarization Control Device 17 3 3 2 Configuring the RC1500 for use with a Polarotor 17 3 3 3 Rotating Feed with Potentiometer Position Feedback 18 3 4 Antenna Drive Polarity and Limits 21 3 4 1 Motor Drive Polarity 22 3 4 2 ...

Страница 5: ...39 4 5 SETUP Mode 40 4 5 1 User Defined Satellite Names 42 4 6 RESET Mode 43 4 7 DELETE Mode 44 4 8 FIX Mode 45 4 9 CONFIG Mode 45 4 9 1 AutoPol 46 4 9 2 Remote Communication Parameters 46 4 9 3 Slow Speed Code 47 4 9 4 Polarization Motor Option 47 4 9 5 Motor Drive Options 48 4 9 6 Signal Strength Parameters 50 4 9 7 Expert Access Flag 50 4 9 8 Reset System Data 51 Chapter 5 SPECIFICATIONS 53 Cha...

Страница 6: ...endix A2 Recovering From Unexpected Memory Upsets 61 Appendix C RS 422 Serial Interface 62 Appendix D The RCI RS 422 Interface Specification 64 Appendix E CONTROL 1500A Communications Protocol APPENDIX G Drive Transfer Function 83 APPENDIX H Electrical Diagrams 84 Drive Board Layout 84 Processor Board Layout 85 Comm Port Wiring Legend 86 RC1KADP Conversion 87 RC1KADP Schematic 88 RC2KPOL Schematic...

Страница 7: ...Processor Board Schematic 91 Drive Board Schematic 92 Declaration of Conformity 93 DAWNco 3340 S Lapeer Rd Orion MI 48359 1320 Ph 248 391 9200 Fax 248 391 9207 sales DAWNco com ...

Страница 8: ...type sensors are found in 36 volt DC linear actuators The CONTROL 1500 keeps track of both rising and falling pulse edges from the pulse sensor for increased accuracy The pulse sensors used with the CONTROL 1500 should not be coupled directly to the antenna axis of rotation 4 The CONTROL 1500 s non volatile memory can remember the positions of a number of geostationary satellites 5 The Adapti Driv...

Страница 9: ... well as the data which can be entered at any prompt After the initial installation when the user has become familiar with the operation of the controller these chapters will probably be the only ones consulted by the user to handle the routine chores of adding new satellites and deleting old ones 1 2 Before You Begin Please read and understand the manual Time invested in understanding the install...

Страница 10: ...r s back panel is described in chapter 3 Figure 2 1 CONTROL 1500A Front Panel The legend above the top row of the LCD defines the POS POL and SS fields The POS field is the current antenna position POL defines the polarization field SS is the signal strength field The three character field in the lower right hand corner of the LCD above the MODE label is reserved for the display of the current con...

Страница 11: ...y is always active SCROLL UP SCROLL DOWN These keys are used to scroll up or down through a list of items YES NO These keys are used to supply an answer to a yes or no question ENTER This key is used to select an entry from a list terminate a prompt for some action by the user or to complete the entry of numeric data 0 9 DECIMAL POINT with the stop key BKSP These keys are used for numeric entry Th...

Страница 12: ...de Programming modes consist of SET setup mode LIM limits CFG config DEL delete FIX resync mode RST reset mode The Operational modes are the ones used in everyday operation of the controller To switch between modes in a group press the MODE key and release The new mode will display in the upper right hand corner of the display To switch to the other group of modes hold the MODE key in for five sec...

Страница 13: ...the voltage applied to the drive The CONTROL 1500 employs a software servo system to maintain a constant rate of slow speed movement The user specifies a slow speed via the Slow Speed CONFIG mode item As the antenna moves at slow speed the controller determines the antenna speed by measuring the time interval between successive position pulses The voltage applied to the drive is adjusted to mainta...

Страница 14: ...es to assign a name which is not stored in the satellite s EPROM memory the USER can manually enter the name See section xx for details 3 The user is then prompted to specify the jH and V polarization values for the satellite by jogging the polarization to those positions If the antenna does not employ motorized polarization adjustment the user must still specify the H and V polarization values to...

Страница 15: ...in chapter 6 DELETE POS POL SS SELECT SAT GALAXY6 DEL MODE This mode allows the user to delete satellites from non volatile memory The SCROLL UP DOWN and ENTER keys are active RE SYNC POS POL SS SELECT SAT GALAXY6 FIX MODE The antenna position can be corrupted by any number of causes sensor failure lightning strike faulty shield connection etc If there is an error in the position counts the contro...

Страница 16: ...itting ENTER key The prompt message on the bottom row of the display provides data entry instructions For some CONFIG mode items one of the two possible data values is displayed in lower case text For these items the upper case prompt specifies the default value of the parameter LIMITS POS POL SS 705 24 431 7 SET CCW LIM MODE This mode allows the user to set the antenna s logical limits To set a l...

Страница 17: ...digit code at the CONFIG mode Expert On CONFIG item This 5 digit code is contained in appendix A of this manual Note that the Expert Access flag is set whenever the controller s memory is cleared via the Reset Sys CONFIG mode item 2 6 AutoPol The AutoPol feature slaves the control1500 s polarization control to a digital output derived from a satellite receiver The control 1500 s AutoPol input acce...

Страница 18: ...ome familiar with the controller s user interface It is not necessary to understand every aspect of the controller s operation to install the unit but the installer should be familiar with the mode structure of the CONTROL 1500 and be able to use the MODE key to place the controller in any of the modes described in Chapter 2 After the AC line voltage is verified and the user has become acquainted ...

Страница 19: ... xx even if your system does not support polarization control Terminal 1 of connector J1 is labeled 3 A removable clamp style 6 position connector designated J2 to interface to the antenna drive motor The antenna actuator interface is described in this section Terminal 1 of connector J2 is labeled 4 A DB 9 female connector J3 for the SA Bus compatible remote control interface Interfacing to the CO...

Страница 20: ...ied to the motors Figure xx in the back of this manual shows the relationship between the controller output voltage and load current The following tables show the separation between the controller and the antenna which will result in 28 and 22 volts being applied to the antenna drive motors as a function of motor current and wire gauge The tables take into account the controller output loading and...

Страница 21: ...er location At the sensor the shield must be left open A short piece of heat shrink tubing can be employed to insulate a frayed foil shielding from any metal objects at the sensor If the shield is allowed to come in contact with earth ground at the antenna ground currents could flow in the shield which could induce noise in the sensor input circuitry If the sensor cable is spliced or is routed thr...

Страница 22: ... terminal labeled Sensor AZ The drain wire of the interface cable MUST be connected to the controller s J1 6 terminal labeled Sensor AZ Some installers feel that Hall effect switches are more reliable because they contain no moving parts Hall effect sensors however are more vulnerable to lightning strikes because of the Hall effect transistor device Figures 3 2 and 3 3 detail the connection of an ...

Страница 23: ...ingle Axis Antenna Controller Chapter 3 Installation Setup 16 Figure 3 2 Reed Sensor Diagram Figure 3 3 Hall Effect Diagram DAWNco 3340 S Lapeer Rd Orion MI 48359 1320 Ph 248 391 9200 Fax 248 391 9207 sales DAWNco com ...

Страница 24: ...ntroller cannot tell if a Polarotor is actually connected to the system or not Once the controller is configured for Polarotor operation the installer should insure that the controller does not think that the Polarotor is at a limit To check for this go to the MANUAL mode If the controller thinks that the Polarotor is at a limit CW or CCW will be displayed in the polarization position field To cor...

Страница 25: ...ape Note that the RC2KPOL daughterboard can optionally be configured at the factory for other output voltages Contact Research Concepts for more information If the current rating of the RC2KPOL motor drive outputs is not sufficient for a given application please contact the factory for other options 3 3 3 1 Verifying the Potentiometer Center Position The most common problem experienced during inst...

Страница 26: ...edure outlined in the following paragraphs Centering the Pot The procedure outlined here may be used to center the feed s range of travel within the pot s mechanical limits 1 Find the total resistance of the pot See step 1 above 2 Loosen up the allen screw which holds the shaft of the pot to the gear 3 Apply power to the feed motor as in step 3 above to center the feed in the middle of its range o...

Страница 27: ...current and the potentiometer position sense signals Figure 3 4 depicts the connection of a rotating feed device with the CONTROL 1500A Note that the potentiometer interface cable s drain wire is connected to the Signal Return terminal 1 of connector J4 FIGURE 3 4 Rotating Feed Interface RC2KPOL Option Only Use the following procedure to configure the CONTROL 2000 for use with a 24V DC polarizatio...

Страница 28: ...the rotating feed polarization motor or potentiometer may occur if the limits are exceeded If the user attempts to jog the polarization motor and no movement is detected on the position sense lines or movement is detected in the wrong direction the Antenna Polarization alarm will activate If a polarization alarm is active an error message ANT POL will flash on the bottom row of the display and the...

Страница 29: ...ockwise CCW limit as seen by an observer above the antenna Use the AZ CCW and AZ CW jog keys to position the antenna at the desired CCW limit Hit the 7 key to set the limit The controller will next display 7 SET CW to prompt the user to set the clockwise CW limit Use the AZ CCW and AZ CW jog keys to position the antenna at the desired CW limit Hit the 7 key to set the limit After the CW limit is s...

Страница 30: ...ustment of Declination Angle East West Bearing Angle adjustment is typically accomplished by rotating the mount s mounting base or can about the pipe or kingpost the antenna is mounted on Figure 3 5 POLAR MOUNT GEOMETRY Table 3 3 Polar Mount Latitude and Declination Angles Antenna Latitude degrees Delta Angle degrees Latitude Angle degrees Declination degrees 5 0 11 5 1 0 76 10 0 24 10 2 1 51 15 0...

Страница 31: ...TATE WEST ROTATE EAST Northern West ROTATE EAST ROTATE WEST Southern East ROTATE WEST ROTATE EAST Southern West ROTATE EAST ROTATE WEST Polar Mount Adjustment Adjusting a polar mount to track the geostationary satellite arc can be challenging We use the following procedure to setup a polarm mount 1 Insure that the antenna kingpost or mounting pole is vertical 2 Set the mount s declination angle to...

Страница 32: ...educed If the declination angle is changed the latitude angle will have to be adjusted again as outlined in step 7 3 5 Slow Speed Adjustment The Adapti Drive slow speed control system allows the user to specify a desired rate of slow speed movement When the antenna is moving at slow speed the controller will vary the voltage applied to the motor to maintain the desired slow speed Other dual speed ...

Страница 33: ...nge of values check the rate of movement to make sure that it is slow enough to be useful but not so slow that the motor stalls or moves in a jerky fashion If the movement is not satisfactory increase or decrease the speed code by 3 to 5 counts Increasing the speed code results in a faster rate of slow speed movement Repeat steps 3 and 4 until satisfactory slow speed movement is attained 3 6 Signa...

Страница 34: ...CD will be displayed if the input channel is saturated In Remote Setup and Limit modes the controller displays the stronger of the two AGC inputs adjusted for the AGC Polarity flag In Manual mode for software versions 1 5x and later the user can hit the Scroll Up and Scroll Down keys to display either AGC1 AGC2 or the stronger of the two AGC1 and AGC2 When the stronger of the two inputs is display...

Страница 35: ...VE polarity go to step 5b If the receiver s AGC has POSITIVE polarity from Manual mode use the Scroll Up Scroll Down keys to examine the signal strength for the AGC channel which was NOT selected in step 3 If the signal strength reading for that channel is greater than 10 adjust the OFFSET and GAIN for that channel until the signal strength reading for that channel is less than 10 To lower the dis...

Страница 36: ...as POSITIVE polarity and the signal strength is too low turn the OFFSET pot counter clockwise If the AGC has POSITIVE polarity and the signal strength is too high turn the OFFSET pot clockwise If the AGC has NEGATIVE polarity and the signal strength is too low turn the GAIN pot counter clockwise If the AGC has NEGATIVE polarity and the signal strength is too high turn the GAIN pot clockwise 8 Whil...

Страница 37: ... band 3 Choose that band that has the greatest difference between the on satellite and off satellite voltages If the difference between the two is less than 1 volt connect the receiver s AGC output to the controller s AGC1 input Otherwise connect the receiver s AGC output to the controller s AGC2 input Be sure to connect the ground return of the controller to a ground on the receiver See figure 3 ...

Страница 38: ... larger C or Ku ____ In the following steps when instructed to position the antenna RCV1 on satellite strong band align the antenna with the ____ Band satellite found in step 1 use the band specified at the end of the previous sentence In step 2 the off satellite AGC voltage was recorded for both C and Ku bands Which voltage was smaller C or Ku ____ In the following steps when instructed to positi...

Страница 39: ...t 650 If the AGC has POSITIVE polarity and the signal strength is too low adjust the GAIN pot clockwise If the AGC has POSITIVE polarity and the signal strength value is too high adjust the GAIN pot counter clockwise If the AGC has NEGATIVE polarity and the signal strength is too low adjust the OFFSET pot clockwise If the AGC has NEGATIVE polarity and the signal strength value is too high adjust t...

Страница 40: ...see section 3 3 1 When a polarization control device is not present the CONTROL 1500 must be configured for operation with a Polarotor type servo polarization control device by setting the 24 vdc Rot Feed CONFIG Mode item to 0 Polarotor type servo and CC or CW must not be displayed in the polarization position field It is recommended that the user first program a pair of satellites into the contro...

Страница 41: ...n position field this will be the twelfth character from the left on the top row of the LCD When AutoPol is disabled the field will be blank 3 9 Installation and Setup Checklist This section gives a summary of the installation and configuration procedure outlined in this chapter The summary is presented in the form of a checklist 1 Before power is applied verify that the line voltage is correct Ch...

Страница 42: ...the range of 0 to 10 volts that varies with received signal strength is available configure the AGC channel 1 and or AGC channel 2 Offset and Gain pots to display received signal strength 8 If desired enable the AutoPol feature to slave the controller s polarization control output to a satellite receiver A digital output on the receiver must be connected to the AutoPol input of the controller and ...

Страница 43: ... configurtion of the controller s slow speed system The POS field displays the current antenna position The POL field shows the current polarity position If the antenna or polarization is at a limit CC or CW for CounterClockwise and ClockWise will be displayed in the POL and POS fields The H and V keys will select the preset horizontal and vertical polarizations of the satellite that was last a ta...

Страница 44: ... POS POL SS SELECT SAT AMC 8 AUT MODE Satellites that have been stored in the controller s non volatile memory via Setup mode can be recalled via Auto mode Antenna position and horizontal vertical presets for up to 50 satellites 38 satellites for software versions prior to v1 5x may be stored in non volatile memory If no satellites have been programmed into the controller s non volatile memory the...

Страница 45: ...ition At power up the CONTROL 1500 will position the polarotor probe at the last commanded Polarotor position When the CONTROL 1500 is interfaced to a Polarotor the controller should be left on 4 2 1 Invalid Data In step 2 of the procedure outlined above the user selects the satellite that will be the target of the automatic move When a satellite is selected the controller checks the validity of t...

Страница 46: ...not displayed Only the Mode key is active when Remote mode is active 4 4 LIMITS Mode Limits mode allows the user to set the software limits If the controller powers up and the limits are corrupt LIMITS mode is automatically invoked An error message ANT LIMITS will flash on the bottom row of the LCD when the limits are corrupt When Limits mode is active there are not software imposed restrictions o...

Страница 47: ... keys to position the controller at the desired CW limit 5 Set the CW Limit Hit the 7 key to set the CW limit When the limit is set the controller will transfer control to Config mode POS POL SS 30 220 210 7 SET CW LIM MODE Note that if Limits mode is terminated by hitting the Mode key before both limits are set the limits which existed prior to this entry will be restored If the unit powers down ...

Страница 48: ...mode or recalled via Auto mode The Scroll Up and Scroll Down keys scroll through a list of satellite names stored in the controller s EPROM memory If the desired satellite name is not listed the USER entry allows to user to specify a 10 character alphanumeric name to assign to the satellite See section 4 5 1 for information on how to enter a user defined satellite name 3 If the satellite name sele...

Страница 49: ... 0 Polarotor type servo and CC or CW must not be displayed in the polarization position field 5 When both horizontal and vertical polarizations have been set the controller will briefly display the following message POS POL SS DATA ACCEPTED SET MODE After the message is displayed control transfers to the initial Setup mode screen the ENTER TO PROCEED message described in step 1 of this procedure I...

Страница 50: ... 6 RESET Mode Reset mode displays antenna and polarization fault conditions These fault conditions can also be reset from this mode the fault conditions reported in this mode disable movement about the affected axis When Reset mode is activated one of the following screens will be displayed if no fault conditions exist POS POL SS OK ANT 1 RST MODE POS POL SS OK OK ANT 1 PL 2 RST MODE The first scr...

Страница 51: ...nds a polarization movement and movement is detected in the wrong direction Note that a polarization jammed condition will occasionally register as a sensor error Polarization movement in the wrong direction should only occur during setup polarization axis only Note that the antenna and high power polarization RC2KHPP only not the RC2KPOL option axis are also protected from over currents by a circ...

Страница 52: ...de Config mode allows the user to view and or modify various controller parameters and to enable or disable certain features When this mode is active the SCROLL keys may be used to select various items for either viewing or modification The BKSP backspace key is active To change the value of a parameter the user can simply key in a new value and press ENTER for the change to take effect and update...

Страница 53: ...l system The AutoPol system is disabled and enabled via the AutoPol Enable CONFIG mode item POS POL SS AUTOPOL ENABLE 0 0 NO 1 yes CFG MODE The AutoPol Vlevel CONFIG mode item specifies the polarity of the AutoPol digital input signal A value of zero implies that a low on the AutoPol digital input specifies vertical polarization and a value of one implies that a high level on the AutoPol input sel...

Страница 54: ...o 175 is appropriate If the slow speed code is changed test the slow speed system to insure that the selected value yields reasonable results Access to this CONFIG mode item is allowed only when the Expert Access flag is set POS POL SS SLOW SPEED 254 0 254 CFG MODE 4 9 4 Polarization Motor Option The RC2KPOL option allows the CONTROL 1500 to control a 12 or 24 volt polarization motor with potentio...

Страница 55: ...L 1500 to control a 12 36 volt relay equipped with a steering diode which in turn activates a larger AC or DC motor Contact RCI for more information about these applications Access to the CONFIG mode items described in this chapter is permitted only when the Expert Access flag is set The Auto Move Cnfg CONFIG mode item is the controlling item for the other CONFIG mode items described in this chapt...

Страница 56: ... and starts to move CCW This can cause position count errors When the antenna drive signals are configured for CCW movement but the antenna is still moving CW pulses which are received would cause the position count to decrement when the count should really be incremented because the antenna is really still moving CW The anti reversal system keeps the antenna from rapidly changing direction If the...

Страница 57: ...OUNTS CFG MODE 4 9 6 Signal Strength Parameters The controller can display signal strength information Signal strength information is generally obtained from a receiver s automatic gain control AGC circuitry The procedures used to adjust the controller s AGC input circuits and obtain these parameters is described in section 3 6 1 AGC Adjustment and Configuration Access to these CONFIG mode items i...

Страница 58: ...this occurs the controller limits are invalidated and most of the various CONFIG mode items are initialized to a default value This operation is usually performed at the factory Access to this item is allowed only when the Expert Access flag is set To reset the system memory the user must key in the same 5 digit code used for Expert Access followed by the ENTER key POS POL SS RESET SYS 0 ENTER COD...

Страница 59: ...t present _______ Rotating Feed CW Limit 500 _______ Rotating Feed CCW Limit 500 _______ Drive Options 0 _______ Fast Slow Threshold 80 counts _______ Auto Retry Attempts 3 _______ Fast Deadband 2000 milliseconds _______ Slow Deadband 800 milliseconds _______ Coast Threshold 4 counts _______ Max Position Error 0 count _______ AGC Polarity Flag 1 _______ Expert Access Flag 1 _______ DAWNco 3340 S L...

Страница 60: ...RIVE Output 12 36VDC 8 0 Amps see appendix G for voltage vs current relationship Sensor Input Reed Hall Effect Optical Polarization Polarotortm Interface standard 24V Rotating Feed with potentiometer feedback if the RC2KPOL daughterboard is installed Fuse 5 amp Slow blow Bussman MDL 5 Littelfuse 313005 Circuit Breaker High voltage transformer secondary protected by 12 amp thermal circuit breaker N...

Страница 61: ...items See the first few paragraphs of section 4 9 for an explanation of the role of controlling CONFIG mode items If the value of a controlling CONFIG mode item is such that access to other CONFIG mode items is restricted corrupt values of those other CONFIG mode items can still generate an alarm message Access to the corrupted item is only available if the controlling item is changed to allow it ...

Страница 62: ...de items has been corrupted Remote Enable Baud 100s or Comm Address Remote Enable is the controlling item for this group of CONFIG mode items it must be enabled to allow access to the Baud 100s and Comm Address CONFIG mode items See section 4 9 2 POL OPTIONS This error caused by an incorrect checksum indicates that the value of at least one of the following CONFIG mode items has been corrupted 24v...

Страница 63: ...the cause of this error go to RESET mode One of the following error messages will be displayed JAMMED RUNAWAY or DRIVE Here are the likely causes of each of these errors JAMMED This error indicates that the drive was commanded to move but movement was not sensed This can be caused by an mechanical jam at the antenna or the antenna may be moving but position feedback pulses are not getting back to ...

Страница 64: ...ion horizontal polarization and vertical polarization are within their respective limits If they are not the error message is displayed This error can occur if the limits were reset after the satellite position was programmed into memory via SETUP mode This error can also occur if the state of the 24vdc ROT FEED CONFIG mode item was changed after the satellite was programmed into non volatile memo...

Страница 65: ...ller or toggle the controller s Expert Access flag The 5 digit code is 41758 Be sure to terminate the entry with the ENTER key The controller is reset via the Reset Sys Config item discussed in section 5 9 9 The Expert Access flag is toggled via the Expert On Config item See sections 2 5 and 5 9 8 DAWNco 3340 S Lapeer Rd Orion MI 48359 1320 Ph 248 391 9200 Fax 248 391 9207 sales DAWNco com ...

Страница 66: ...abled disable that feature 4 Move the antenna to the position just before the east and down limits are reached This should correspond to a position count value of 30 for both the azimuth and elevation axis 5 Turn the unit off unplug the unit from the AC power and perform whatever maintenance is required If the EPROM in replaced be sure to insert the chip into the socket properly The notch on the e...

Страница 67: ...olatile memory Go to SETUP mode Position the antenna on each of the satellites which were recorded in step 3 above Select the satellite name enter the satellite longitude and move the polarotor to the recorded H and V positions in response to the appropriate SETUP mode prompts DAWNco 3340 S Lapeer Rd Orion MI 48359 1320 Ph 248 391 9200 Fax 248 391 9207 sales DAWNco com ...

Страница 68: ...ces on the mount where slippage could occur This would allow the mount to be restored to its original configuration If the contents of non volatile memory are recorded as outlined in steps 1 4 above recovery from an unexpected memory upset can be readily accomplished If the memory is corrupted the antenna can be moved in LIMITS mode to the east and down limit with the aid of an assistant stationed...

Страница 69: ...TROL 2000 a protocol converter is required The RC2K EXE or RC2KC EXE for use with the CONTROL2000C program is designed primarily for use by software developers or during installation These programs feature a crude user interface which displays each byte of data sent to the controller and each byte received from the controller in an ASCII format and hex format We recommend that these programs be us...

Страница 70: ...ingle Axis Antenna Controller Appendix C RS 422 Serial Interface 63 Louth Automation 415 329 9498 M C Systems 408 454 0396 DAWNco 3340 S Lapeer Rd Orion MI 48359 1320 Ph 248 391 9200 Fax 248 391 9207 sales DAWNco com ...

Страница 71: ...ceivers in the controllers allow up to 32 devices to be connected in parallel with up to 1 500 feet between the master and group of controllers Physical Specifications The physical implementation of the interface takes the form of a 9 pin D connector located on the rear panel of the controller This connector and its wiring is compatible with EIA RS 449 which is the mechanical specification for RS ...

Страница 72: ...particular function Each network configuration can have one master and up to 32 slave devices Each controller is internally configured to respond to a unique address A master could be a protection switch earth station controller or any micro or mini computer that is electrically and operationally compatible with RS 422 Since the electrical specifications are very similar to EIA standards RS 422 an...

Страница 73: ...e of IBM s binary synchronous communications protocol BISYNC The master station sends a command over the bus to all remote stations The station whose address is contained in the second byte of the command message carries out the requested commands and then replies with a response message containing its own address and status information relating to its present condition A remote station only sends...

Страница 74: ...ns with ACK 06 hex the ASCII Acknowledge control character and a message not acknowledged reply begins with NAK 15 hex the ASCII Not Acknowledge control character All messages end with the ETX 03 hex the ASCII End of text control character followed by the checksum byte Address Character The device address must be a valid ASCII printable character between 31 and 6F in hex thus 63 addresses are poss...

Страница 75: ...ver El mounts Slave State Diagram Introduction General Description The slave State diagram see Figure 5 presents the required protocol implementation at the slave device that guarantees the proper transfer and processing of communication messages sent by a Master controller State Diagram Notation Each state that a slave can assume is represented graphically as a circle A single digit number is use...

Страница 76: ... in the message data block The value of LRC byte is the exclusive OR of all message bytes including the STX and the ETX bytes and is used to detect errors during transmission of data ___________________________________________________________________________________ States Description State 1 Slave Idle State In State 1 a slave is ready to receive a new message and therefore must complete any prev...

Страница 77: ... received State 4 Slave Data Error State In State 4 a slave is waiting to receive a Checksum byte that tests the transmitted message for errors A slave will exit State 4 and enter State 5 Command Execute State if a Checksum byte is true received LRC value of Checksum byte equals the LRC value computed by a slave during message reception State 1 Slave Idle State if a Checksum byte is false received...

Страница 78: ...lso been corrected 2 6 04 The CONTROL 1500 single axis antenna controller was derived from CONTROL 2000C Polar dual axis inclined orbit tracking antenna controller The remote interface of the CONTROL 1500 is nearly identical to that of the CONTROL 2000 The CONTROL 1500 s comm protocol can best be described as that of the CONTROL 2000C Polar with all of the elevation related fields ignored Two vers...

Страница 79: ...arting with the STX character through the ETX character RC1500 UNRECOGNIZED COMMANDS NAK REPLY If an unrecognized command arrives one whose command code is either unknown or whose length is not compatible with the given command code but which has the correct address and checksum a NAK reply is sent to the host The format of the NAK reply is byte 0 NAK byte 1 A where A is the CONTROL 1500 address b...

Страница 80: ...he entire field the name will be left justified and the string will be padded with blanks If a satellite name is not currently displayed this field will contain blanks byte 13 sat_name status binary data 7 6 5 4 3 2 1 0 0 0 1 0 0 0 _ _ 0 0 displayed in upper case letters 0 1 displayed in lower case letters 1 0 sat_name not displayed bytes 14 18 position This field will contain the current antenna ...

Страница 81: ... alarms or movement 0 0 1 0 east movement pending 0 0 1 1 west movement pending 0 1 0 0 east movement in progress 0 1 0 1 west movement in progress 0 1 1 1 an auto move is in progress 1 0 0 0 runaway alarm active 1 0 0 1 jammed alarm active 1 1 0 0 drive alarm active This is triggered by an overcurrent condition Note Higher value status codes have priority over lower value ones i e if as part of a...

Страница 82: ...GC POLARITY RC1500A data alarm 0 0 0 0 1 1 1 1 NOT USED 0 0 0 1 0 0 0 0 16 TIME DATA RC1500B alarm 0 0 0 1 0 0 0 1 17 NOT USED 0 0 0 1 0 0 1 0 18 POL OPTIONS alarm 0 0 0 1 0 0 1 1 19 ANT POL alarm 0 0 0 1 0 1 0 0 20 OPTIONS alarm byte 32 This byte gives information that allows the user to determine the exact value of the controller s internal polarization position representation This may be used w...

Страница 83: ...ization position and the polarization position displayed via the user interface are the same and will be a value in the range of 0 to 1023 For the rotating feed the user is prompted to set CW and CC limits When the polarization position is less than or equal to the CW limit specified by the user the CW banner will be displayed When the polarization position is greater than or equal to the CC limit...

Страница 84: ... greater input level 1 0 agc channel two has the greater input level a a a a a the least five significant bits of the agc input level on the channel specified by c1 and c0 above byte 35 This byte indicates the status of the flag that specifies whether or not remote polarization commands will be accepted when TRACK mode is active and the five most significant bits of the agc input level 7 6 5 4 3 2...

Страница 85: ... be 01 the first time through and then incremented until the YY YY being the last entry in the list satellite name is read The maximum possible range for XX and YY is 1 through 50 byte 5 ETX byte 6 chksum the checksum The normal response to this query command contains 19 bytes and the format is as follows byte 0 ACK byte 1 A where A is the Control1500 address byte 2 35h the query name command code...

Страница 86: ...the blank character is accepted in the polarization field Note that the position must be specified in position counts and not in an angle format Form 3 If the polarization field contains the P character the command is interpreted as a go_to_polarization command For this form of the command the first 5 characters of the sat_name position field specify the target polarization position in the control...

Страница 87: ...t this command must contain a valid value even if the direction field specifies X Stop byte 9 ETX byte 10 chksum the checksum The reply to this command will be the same as the reply to the status poll query except that the command code will be 33h POLARIZATION COMMAND The following command specifies a polarization jog The command contains 6 bytes Byte 3 can contain one of the following values C jo...

Страница 88: ...nfigured for use with the optional polarization control motor X P This sub command allows the host to enable or disable the autopol mode If the sub command is P the sub command parameter Y must either be N or F for autopol oN or ofF respectively X T This sub command is used to reset track mode errors sub command parameter Y R When the TRACK mode ERROR sub mode is active this command will cause the...

Страница 89: ...s prompted for commands to send to the controller In the middle window the command strings sent to the controller are displayed The bottom window displays all characters received from the controller The source code is included with the program and a developer may examine and freely use any of the routines A disk containing this program is included with each controller MESSAGE DELIMITERS Here are t...

Страница 90: ...ction 83 APPENDIX G Drive Transfer Function CONTROL 2000 Drive Transfer Function Fast Speed 0 5 10 15 20 25 30 35 40 45 0 2 4 6 8 10 Output Drive Current Amps Output Voltage DC Volts DAWNco 3340 S Lapeer Rd Orion MI 48359 1320 Ph 248 391 9200 Fax 248 391 9207 sales DAWNco com ...

Страница 91: ...RLY Q3 Q1 Q2 Q4 RLY Q7 Q5 Q6 Q8 RLY Q8 Q7 Q5 Q6 Q3 RLY Q1 Q4 Q2 U2 U3 R52 R55 R56 R53 R51 R54 C5 C3 C4 C6 R41 R42 R45 R46 R47 R48 R44 R43 R50 R49 LM613CN P1 P2 039 E 904 R17 R24 C2 R11 R12 R13 C7 AZ CL EL CL C11 AZ TP EL TP R9 R8 R7 R10 R2 R1 Q3 Q2 Q1 Q4 Q7 Q5 Q6 Q8 R38 C8 1 VR1 R40 R39 C10 C9 J3 1 EL AZ I_AZ I_EL RC2KDRV2 Research Concepts Inc Copyright 1992 10 9 7 8 3 1 2 4 11 13 12 0 000 0 000 ...

Страница 92: ... V AZ EL 1 AGC 2 AGC_2 AGC_1 P1 JMP1 R4 R5 J4 R34 C24 C23 C22 C21 RN3 U12 C30 D7 D8 D9 VR1 L1 C34 U17 P2 C35 E M R1 U6 C3 C5 C4 RN1 1 J2 C13 C12 B1 Q2 Q1 C8 U5 U4 U3 U1 U7 C9 C7 U2 RN2 C39 C38 X1 C1 C2 U8 C16 C29 U16 R21 R23 R22 R25 R24 R20 R19 R18 C27 U15 C25 R15 R16 R13 R14 R17 R10 R11 R12 D11 R28 R29 D6 D12 C33 Q3 VR2 C31 R30 C32 R27 D3 R26 R6 R7 C26 C28 D4 J5 9 1 R9 C15 J3 RN4 1 C20 R44 GAIN1 ...

Страница 93: ...CONTROL 1500A Single Axis Antenna Controller Appendix H Electrical Diagrams 86 Comm Port Wiring Legend DAWNco 3340 S Lapeer Rd Orion MI 48359 1320 Ph 248 391 9200 Fax 248 391 9207 sales DAWNco com ...

Страница 94: ... RC1KADP INTERCONNECTS 11 15 91 RC1KADP RXD TXD SG TXD TXD RXD SHLD J2 J3 J1 RC1KADP Protocol Converter RC1KADP 5 9 4 8 3 7 2 6 1 RC1000 RC2000 BACK PA NE L A4 Number Rev Titl e Size Sheet 1 of 1 Drawn by PFG Filename Date A A B B C C D D 1 1 2 2 3 3 4 4 Research Concepts Inc RXD DAWNco 3340 S Lapeer Rd Orion MI 48359 1320 Ph 248 391 9200 Fax 248 391 9207 sales DAWNco com ...

Страница 95: ...CONTROL 1500A Single Axis Antenna Controller Appendix H Electrical Diagrams 88 RC1KADP Schematic DAWNco 3340 S Lapeer Rd Orion MI 48359 1320 Ph 248 391 9200 Fax 248 391 9207 sales DAWNco com ...

Страница 96: ...CONTROL 1500A Single Axis Antenna Controller Appendix H Electrical Diagrams 89 RC2KPOL Schematic DAWNco 3340 S Lapeer Rd Orion MI 48359 1320 Ph 248 391 9200 Fax 248 391 9207 sales DAWNco com ...

Страница 97: ...CONTROL 1500A Single Axis Antenna Controller Appendix H Electrical Diagrams 90 RC2KHPP Schematic DAWNco 3340 S Lapeer Rd Orion MI 48359 1320 Ph 248 391 9200 Fax 248 391 9207 sales DAWNco com ...

Страница 98: ...CONTROL 1500A Single Axis Antenna Controller Appendix H Electrical Diagrams 91 Processor Board Schematic DAWNco 3340 S Lapeer Rd Orion MI 48359 1320 Ph 248 391 9200 Fax 248 391 9207 sales DAWNco com ...

Страница 99: ...CONTROL 1500A Single Axis Antenna Controller Appendix H Electrical Diagrams 92 Drive Board Schematic DAWNco 3340 S Lapeer Rd Orion MI 48359 1320 Ph 248 391 9200 Fax 248 391 9207 sales DAWNco com ...

Страница 100: ...s to which conformity is declared EN 55022 1991 EN 50082 2 EN60950 Type of Equipment Satellite Antenna Controllers Model No s CONTROL 2000A Year of Manufacture 1998 In order to meet the EMC directive fully shielded properly connected cable is required for all connection DAWNco 3340 S Lapeer Rd Orion MI 48359 1320 Ph 248 391 9200 Fax 248 391 9207 sales DAWNco com ...

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