RFM HN-591 User Manual Download

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HN-591

900MHz Desktop Wireless Modem

User’s Guide

Summary of Contents for HN-591

Page 1: ...HN 591 900MHz Desktop Wireless Modem User s Guide ...

Page 2: ...ny other mode of operation using this antenna is forbidden Notice to WIT910 users installers using the following fixed antennas Cushcraft 8 5 dBi Yagi The field strength radiated by this antenna when connected to a transmitting WIT910 may exceed FCC mandated RF exposure limits FCC rules require professional installation of these antennas in such a way that the general public will not be closer tha...

Page 3: ...mands 21 Set Transceiver Mode 21 Set Default Handle 21 Enable Global Network Mode 22 Set Hopping Pattern 22 Set Transmit Power 22 Read Receive Signal Strength Indicator RSSI 22 Protocol Commands 23 Set Alternative Frequency Band 23 Set Hop Duration 24 Set Minimum Data Length 24 Get Maximum Data Length read only 24 Set Maximum Number of Remotes base only 24 Set Packet Attempts Limit 24 Set Data Tra...

Page 4: ...tem Problems 33 Guidelines for Reducing Interference 34 Introduction 34 Guidelines for Selecting Your Site 34 Guidelines for Avoiding Terrain Obstructions 34 Customer Support 35 Introduction 35 Technical Assistance 35 Factory Repairs 35 Glossary of Terms 36 Technical Specifications 37 General 37 Mechanical 37 Mechanical 38 Environmental 38 Appendix A 39 HNWizard INIT INI File 39 HNWizard s WinCom ...

Page 5: ...m reduces the vulnerability of a radio system to both interference from jammers and multipath fading by distributing or spreading the signal over a larger region of the frequency band The fade resistant HopNet frequency hopping technology employs up to 54 channels and switches channels over 40 times a second to achieve high reliability throughput HopNet Data Integrity An on board 512B buffer and e...

Page 6: ...he operational status PWR TX RX CD The table below describes the function of each LED Name Color Description PWR Green Red Continuous DC power is applied TX Red RS 232 signal input RX Red RS 232 signal output CD Red Normal operation is asserted Power Connection The HN 591 is supplied with a 110VAC wall mount power supply However you can operate the HN 591 from any well filtered 5 VDC power source ...

Page 7: ...ed or a PC running a terminal emulation program HNWizard is a software package that runs under Windows 98 NT 2000 XP This chapter provides the information you need to configure your HN 591 The HN 591 is shipped from the factory initially configured as a remote with a 9600 baud rate 2000 2004 Cirronet Inc 3 M 910 0012 Rev A ...

Page 8: ...s some selections in the Wizard will be grayed out if they are not applicable to the radio in use After detecting the serial port and baud rate of the HopNet radio the Wizard reads the settings of the HopNet radio that is connected to the PC and will display them in the various parameter windows In the bottom left corner of the Wizard window the Base Remote status the serial number and the communi...

Page 9: ...is currently in the attached HopNet radio the label and parameter value will return back to black When new values are applied to the HopNet radio the red values will turn black indicating the updated values in the radio NOTE The changes are not sent to the HopNet radio until the Apply Settings button is clicked Context sensitive help is available through the F1 key or Help menu 2000 2004 Cirronet ...

Page 10: ...ables to be set 1 Base or Remote 2 Point to Point or Multipoint 3 Baud rate 4 Network number 5 Lockout Key 6 Roaming Mode 7 Protocol Mode Depending on whether HopNet radio is configured as a Remote or Base when first connected the heading on the Parameters page will display either Remote Parameters or Base Parameters 2000 2004 Cirronet Inc 6 M 910 0012 Rev A ...

Page 11: ...t Lockout Key This parameter allows further network segregation beyond the network number This feature allows multiple co located networks in which global roaming is enabled By using different lockout keys the bases to which remotes link can be limited or segregated Serial Port Settings This parameter is only available on radios with Modbus adapters It allows the setting of even odd or no parity 7...

Page 12: ...e section on Protocol Modes for details on each format When the radio is linked to another radio a communications test can be run by clicking on the Send Data button shown below on both radios The remote radio s Transmit Data window above left will display the message This is a test message from the Base radio which will repeat until the Stop button is pressed on the base radio s HN Wizard main sc...

Page 13: ...well time at which the HopNet radio hops set a minimum number of bytes of data the radio must receive before it will transmit set a maximum amount of time the radio will wait to receive the minimum number of bytes before transmitting what is in the radio s buffer and set the number of times the radio will repeat a transmission that is not acknowledged before discarding the data 2000 2004 Cirronet ...

Page 14: ...s and thus will be an integer multiple of the Hop Duration The Maximum Base Packet can only be set in radios set as a base If the radio is a remote this value cannot be changed Maximum Base Packet base station only This command sets the amount of time allocated for transmission on each hop for the base station time slot in 4 byte increments If using a protocol mode attempting to send a packet with...

Page 15: ...signal faster at system startup and will generally decrease packet latency A larger value increases network capacity due to decreased overhead in channel switching This Set Hop Duration value only needs to be set in the base which broadcasts the parameter to all remotes However link time can be reduced if this value is also programmed into the remotes which use it as a starting value when scanning...

Page 16: ...rotocol Tab The Protocol tab brings up the configuration screen above On the next page are descriptions of the commands parameters that are available for modification 2000 2004 Cirronet Inc 12 M 910 0012 Rev A ...

Page 17: ...e radio operates in For 2 4GHz radios selecting one of the 802 11b bands in which to operate the HopNet radio can be used in locations with 802 11b networks without causing interference with those networks If there are no 802 11b networks present it is recommended that the radio be set to operate in the entire band which is the default For 900MHz radios there will only be two bands to select The R...

Page 18: ...perating as remote radios The radio must be linked with its base radio for the functions on this screen to work Range Optimization HopNet 10 Series only This command automatically applies an adjustment factor to the over the air timing of remotes to compensate for the effects of propagation delay at long ranges Simply click on the radio button opposite Range Optimization and the following screen w...

Page 19: ... between radios and click OK A bar will appear showing the progress of Range Optimization Once the process has completed the Range Optimization radio button will clear and the Done radio button will fill in indicating that adjustment factor has been applied 2000 2004 Cirronet Inc 15 M 910 0012 Rev A ...

Page 20: ...e Only percentage above 95 and the Bi Directional percentage above 90 These functions operate with the Automatic Retransmit Request ARQ disabled and as such provide an indication of link quality but do not provide an indication of how often data will get through since in normal operation ARQ is enabled and the radio automatically and transparently will resend data that was not received on the firs...

Page 21: ...vels between these two points will display yellow These points can be modified by editing the INIT INI file refer to Appendix A in the section on HNWizard s INIT INI file Under normal operation the received signal strength for each channel will fluctuate occasionally dropping to nothing indicating the hop was missed by the radio This display also shows multipath fading when a channel drops noticea...

Page 22: ...ly Settings button is clicked Modem Commands The HopNet is configured and controlled through a series of commands These commands are sent to the modem directly when the modem is in Control Mode or when the modem is in Data Mode if the escape sequence is enabled The command syntax is the same for either method a one or two letter command followed by one or more parameters The modem will respond wit...

Page 23: ...ction notification 03 08 reserved for future use 09 mode 01 during transmit transparent receive 0A mode 02 during transmit transparent receive 0C 10 reserved for future use 11 transparent transmit mode 01 during receive 12 transparent transmit mode 02 during receive Set Data Rate Divisor Sets the serial bit rate between the modem and the host This command takes effect immediately and will require ...

Page 24: ... desired by the application Remotes can operate in transparent mode even though the base station is operating in one of the nontransparent modes When using a protocol mode make sure to count in packet overhead when calculating network performance Refer to the section on Protocol Modes for details on each format 2000 2004 Cirronet Inc 20 M 910 0012 Rev A ...

Page 25: ...any hop pattern regardless of wn parameter wn 0 1f Set Hopping Pattern Network Number 0 default wp 0 1 2 Set Transmit Power 0 10mW 1 100mW default 2 500mW wr Read Receive Signal Strength remote only Set Transceiver Mode Sets modem operation as either base station or remote Default is remote Set Default Handle This handle will override the automatic handle assignment by the base station When specif...

Page 26: ...fferent frequencies Set Transmit Power The HopNet has three preset transmit power levels 10mW 10dBm 100mW 20dBm and 500mW 27dBm Control of the transmit power is provided through this command Default is 100mW Read Receive Signal Strength Indicator RSSI This command reports the relative signal strength averaged over the last 10 hops This command returns a one byte value that is proportional to recei...

Page 27: ...s pr 00 ff Set Packet Attempts Limit 10H default FFH Infinite retry RF flow control point to point only pt 00 ff Set Data Transmit Delay 00H default pv 0 1 base only Set Slot Assignment Mode 0 default dynamic slot assignment 1 static slot assignment pw 00 2f base only Set Base Slot Size 08H default 32 bytes px 0 1 Set ARQ mode 0 ARQ enabled default 1 ARQ disabled redundant transmission Note Incorr...

Page 28: ... remote By reading this parameter and dividing by the hop duration the remote s data rate capacity can be determined Attempting to send protocol mode packets longer than maximum data length will result in the packet being discarded without being sent See the section on the tradeoffs between hop duration and data length Set Maximum Number of Remotes base only This parameter limits the number of rem...

Page 29: ... sure maximum number of remotes is correctly set Otherwise remote transmit performance will suffer as transmit time will be reserved for remotes that may not exist The dynamic assignment mode will generally be preferred however the static assignment mode will result in a static maximum data length parameter Set Base Slot Size base station only Sets the amount of time allocated for transmission on ...

Page 30: ...ay of the banner string and revision code automatically at power up May be disabled to avoid being mistaken for data by the host Set Escape Sequence Mode Enables or disables the ability to use the in data stream escape sequence method of accessing Control Mode by transmitting the string wit2410 When this mode is set to 1 the escape sequence only works immediately after reset this is the default Wh...

Page 31: ...ws reduced power consumption by having a remote wake up only every 2N hops to receive and transmit Power consumption is roughly proportional to the duty cycle selected For example if N 2 the remote will wake up every fourth hop Power consumption will be roughly the consumption as when N 0 This parameter must be set to the appropriate value when more than 16 remotes are in use 2000 2004 Cirronet In...

Page 32: ...s the HopNet to its factory default state This is useful for testing purposes or if there is a problem in operation of the system and the configuration is suspect Use the Store Memory command afterwards if you wish the factory default settings to be remembered the next time you cycle power or reset the radio Recall Memory Useful for restoring the power on settings after experimenting with temporar...

Page 33: ...Maximum Data Length pn 01 3e Set Maximum Number of Remotes base only pk 00 d4 Set Minimum Data Length pr 00 ff Set Packet Attempts Limit pt 00 ff Set Data Transmit Delay remote only pv 0 1 Set Slot Assignment Mode base only pw 00 2f Set Base Slot Size base only px 0 1 Set ARQ Mode Status Commands zb 0 1 Banner Display Disable zc 0 2 Set Escape Sequence Mode zh Read Factory Serial Number High Byte ...

Page 34: ...through a repeater See the illustration of a point to point application on the next page Point to Multipoint This common application consists of a central host and remote terminal units or other data collection devices The automatic repeat requests ARQ and acknowledgments inside the radio are transparent to the computer system HN 591 HN 591 HN 591 2000 2004 Cirronet Inc 30 M 910 0012 Rev A ...

Page 35: ...HN 591 Point to Point A point to point application as shown below provides a communication data link between two locations HN 591 HN 591 2000 2004 Cirronet Inc 31 M 910 0012 Rev A ...

Page 36: ...s to it If the base station has problems the entire network will be compromised This chapter provides troubleshooting information for your HopNet products Transceiver Requirements For proper operation all transceivers in the network must meet these basic requirements Adequate and stable power Secure connections Power RF and Data Proper programming especially Hop Duration and Network Address 2000 2...

Page 37: ...ntenna feedline connectors and reflective power 3 If remote unit is in synchronization but performance is poor it may indicate antenna problems Check for properly aligned antenna headings 4 Verify proper programming of the system parameters Interference is suspected 1 Verify that the system has a unique network address Nearby systems with same address will cause interference problems 2 If Omni dir...

Page 38: ...its Proper antenna selection data access and feedline cabling Guidelines for Avoiding Terrain Obstructions The HopNet transceivers operate in the 900MHz frequency band While this band offers many advantages it is prone to signal attenuation from obstructions such as terrain foliage buildings and anything else in the transmission path Use the following guidelines to avoid terrain obstructions A lin...

Page 39: ...o the factory The following telephone numbers are available for assistance Phone 678 684 2000 Fax 678 684 2001 Factory Repairs If return of equipment is necessary you will be issued a Return Material Authorization number RMA The RMA will help expedite the repair so that equipment can be returned as quickly as possible Please be sure to include the RMA number on the outside of the shipping box and ...

Page 40: ...ata Communications Equipment A device that receives data in the form of digital signals at its input The modem side of a computer to modem connection DCD Data Carrier Detect DTE Data Terminal Equipment A device that provides data in the form of digital signals at its output The computer side of a computer to modem connection EIRP Effective Isotropic Radiated Power ISM Industrial Scientific or Medi...

Page 41: ...ork Protocol ARQ E TDMA TX Power Output 27 dBm Receive Sensitivity 104 dBm for 10 5 BER RF Bandwidth 172KHz Modulation Type GMSK Output Impedance 50 Ω Antenna Connector Reverse SMA RF Jack Input Power at Connector 5 VDC Operating 200 mA Typical 750 mA surge 5 Ground 9 Not Used 4 Not Used 8 Clear to Send CTS 3 Transmit Data TX 7 Request to Send RTS 2 Receive Data RX 6 Data Set Ready DTR 1 Data Carr...

Page 42: ... Metal Size 5 in x 3 5 in x 1 in 127mm x 89mm x 25mm Weight 0 5 lb 227 g Data Connector DB 9 Receptacle Environmental Specification Value Temperature Range 0 to 40 C Humidity 95 at 40 C Non condensing 2000 2004 Cirronet Inc 38 M 910 0012 Rev A ...

Page 43: ...RSSIPoor the bars will be red in color FullShow 0 1 2 This changes the number of options that are viewable 0 default Shows minimum amount of options 1 Adds all other options 2 Adds WinCom AutoDetect 1 1 Auto detects radio 0 User defined inputs The parameters below should not be changed as they are specific to different radios These parameters will come from the factory set for your radio 40dBm 125...

Page 44: ...ed Com Port and Baud Rate will need to be set manually NOTE In order to display the banner you will need to press the F1 key twice toggling the DTR which resets the radio and causes a new banner to display WinCOM de asserts and re asserts the DTR line to the radio which resets the radio causing the sign on banner to be displayed as shown below The banner indicates the radio firmware version whethe...

Page 45: ...line in the COM port The radio is normally in data mode data that is sent to it from the PC is transmitted over the wireless connection When the WinCOM window is active keys typed on the keyboard will be sent to the radio and will be transmitted Unless the Echo box is checked the typed data will not be displayed in the WinCOM window of the sending radio To change configuration parameters the radio...

Page 46: ...o the Configuration Commands section below for details on all the configurable parameters When the radio is linked to another radio a communications test can be run by clicking on the Transmit button or pressing the F6 key Whatever ASCII string is in the Transmit String window will be transmitted as shown below If the other radio is sending data the received data will be displayed in the WinCOM wi...

Page 47: ... to next higher value Value is displayed in status line Useful when WinCOM is used to change the interface data rate WinCOM can communicate at new data rate without having to exit and re enter WinCOM PgDn Sets data rate of PC serial port to next lower value Value is displayed in status line Recover When the Wizard program is opened it reads the parameters of the HopNet radio connected to the PC Th...

Page 48: ...sed that prevent the Wizard from detecting that a radio has been disconnected from the computer running the Wizard If a radio is disconnected from the computer and the Wizard does not detect it the Restart button should be clicked when it or another radio is connected Note that clicking the Restart button will not change the parameter values stored for use by the Recover button 2000 2004 Cirronet ...

Page 49: ...wer failure No suit or action shall be brought against Seller more than twelve 12 months after the related cause of action has occurred Buyer has not relied and shall not rely on any oral representation regarding the goods sold hereunder and any oral representation shall not bind Seller and shall not be a part of any warranty THE PROVISIONS OF THE FOREGOING WARRANTY ARE IN LIEU OF ANY OTHER WARRAN...

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