manualshive.com logo in svg

COMECO TC800, Operation Manual, Page: 26 / 28

Share
Download
COMECO TC800 Operation Manual Download Page 26

26

16. DEVICE APPLICATION

Depending on the programming of the alarms and the outputs assigned to them, TC800 may be used as

an indicator with multi-level signaling, as a two-state or three-state ON/OFF controller, or as a multistage

controller. The operator may program his TC800 controller to perform the functions of any of these devices.

16.1. Multi-level signaling and indication

Thanks to its large number of relay outputs and variety of available alarms, TC800 may be used in systems for

signaling of various events of measured variable variation, as well as a part of discrete logic control systems (Fig. 16.1).

Fig. 16.1

16.2. Two-state ON/OFF control

Some or all TC800 channels may be used for multi-channel ON/OFF control. An ON/OFF controller

measures input value, compares it with a predefined set-point value and accordingly switches a relay on or off.

A most common example is where electric-oven temperature is measured and the heater is switched on or off.

One ON/OFF channel controller consists of: 1 input, 1 high- or low-level type alarm, and 1 electromechanical

relay. In this way, up to 8 ON/OFF controllers may be programmed into one device.

The two-state ON/OFF control has the static characteristics shown on Fig. 16.2. This is the same as the one

of the alarms of chapters 8.5.1 and 8.5.2.

Fig. 16.2

                                                  Fig. 16.3

The relay is switched on and off at exceeding / falling below the set-point value. The switching is made

not exactly at the value of SP, but a little above SP (at SP + HYST/2) at input increase and a little below SP

(at SP + HYST/2) at input decrease. This is done in order to avoid frequent relay switching.

Please note that using ON/OFF control, the controlled (measured) value never settles exactly on set point,

but cycles periodically above and below it. ON/OFF control is used when no precision is required.

The structure of one channel of the control system is shown on Fig.16.3.

To program a channel to function as an ON/OFF controller, set the parameters of one of the alarms as follows:

AlL

SP

hYSt

HYST

tYPE

__g+

or

+7__

As the device has up to 8 inputs and programmable relay outputs, it can function as up to 8 two-state

ON/OFF controllers.

Summary of Contents for TC800

Page 1: ...C800 Operation manual Version 4 2 revised June 2012 Please read this manual BEFORE INSTALLATION COMECO Inc P O Box 378 4000 Plovdiv Bulgaria tel 359 32 646523 646524 fax 359 32 634089 e mail info comeco org www comecogroup com ...

Page 2: ...toring at power on Communication with PC via digital interface connection of several devices into one network 2 TECHNICAL SPECIFICATIONS Analog inputs up to 8 analog inputs SENSOR TYPE LINEARISED INPUT SIGNAL RANGE according to customer tables thermoresistance RTD Pt50 Pt100 Pt500 Pt1000 100 0 200 0 C thermoresistance RTD Cu50 Cu53 Cu100 0 0 200 0 C thermoresistance RTD Cu50 Cu53 Cu100 50 0 200 0 ...

Page 3: ...ft 0 005 from span for 1 C Cold junction compensation 1 C automatic software RTD line compensation software 3 MOUNTING Before starting any mounting and wiring operations please read carefully chapter Protection from electro magnetic disturbances The requirements stated are important for normal and trouble free device operation 3 1 Protection from electromagnetic disturbances For proper device func...

Page 4: ...tact life shortening To quieten the arc connect an RC network in parallel with the contact Fig 3 3 For circuits up to 3A 300 V the RC network should be made of a 47 Ω resistor in series with a 0 1 μF 1000 V capacitor In cases of voltages higher than 200 V add MOV in parallel Please note that at 230 V 50 Hz supply up to 7 mA current may flow through the network Fig 3 2 Fig 3 3 Fig 3 4 In parallel w...

Page 5: ...iscrete input according to Fig 3 7 To connect the outputs follow the diagram on Fig 3 8 Wire the digital interface as shown on Fig 3 9 the main power supply as shown on Fig 3 10 and the transmitter power supply according to Fig 3 11 Fig 3 6 Fig 3 7 Fig 3 8 Fig 3 9 Fig 3 10 Fig 3 11 WARNING Auxiliary supply load capability is max 40 mA ...

Page 6: ...t is exceeded a corresponding LED is lit up TC800 signals for any system failure or unexpected emergency situation by displaying a message and activating relay output K9 When digital interface is ordered the device sends the required information at request over the interface Operation with the digital interface is described in the Communication Protocol section of this manual 5 OPERATION 5 1 Devic...

Page 7: ...uch input is configured but a password is assigned TC800 enters Manual mode only after the correct password has been entered see chapter 6 2 While the device is in Manual mode the sign Z blinks on the left of the input number on the upper display In Manual mode the device functions as a single channel indicator controller Only the currently displayed input is measured and only the alarms assigned ...

Page 8: ...ED changes may be made a closed contact means ACCESS DISABLED read only access The external access authorization contact has a priority to password i e if access authorization contact input is configured the password is disabled If the external contact is closed access disabled and an attempt to switch to Manual mode is made d2 Prot is displayed and the mode remains the same Similarly when alarm p...

Page 9: ...assword only once and use it for the whole programming and testing session 6 3 The tree arrangement of parameter groups The groups of parameters concerning configuration programming and information contain a large number of parameters Therefore these parameters are ordered in a tree like arrangement A group consists of subgroups Each subgroup may have its subgroups and so on A subgroup that has no...

Page 10: ...s is indicated by the blinking of the dot itself The acceptable allowed values for a parameter are defined either by a minimum to maximum range or a table of all acceptable values The blinking symbols may be changed by pressing or When a certain set of acceptable values is defined the key selects the next value and the key the previous value To select another digit for change i e change the blinki...

Page 11: ...controller memory To not loose all changes exit parameter group programming by pressing if no parameter value is shown on the display otherwise first finish parameter adjustment When the changing of parameter values is allowed at exiting the parameter group TC800 checks all values writes them into its permanent memory and starts using them The message Stor stays on the lower display during the sto...

Page 12: ...same combination of keys Changing the values of the parameters from the configuration parameter group is always possible and is NOT protected by a password or external access restriction contact 7 2 Main parameter tree of configuration cF yc Q1 Q s1 Fig 7 1 s2 the parameter yc is present only if the device has at least one thermocouple input denotes analog input number 1 8 it depends on the number...

Page 13: ...ure It is not available for alarms and is not displayed in normal mode default value no 7 4 Analog input configuration Each analog input must first be programmed as enabled to indicate that it will be used Q uSE Fig 7 2 7 4 1 Enabling disabling of analog inputs parameter uSE VALUE COMMENT YES Input enabled in use no Input disabled not in use nothing connected to it default value no If the paramete...

Page 14: ...ut the parameter Lo is used to specify the value corresponding to the lowest input current or voltage Similarly hi defines the value corresponding to the highest input current or voltage The parameter tree is Q uSE YES Lo Fig 7 5 hi Lower range limit of linear input PARAMETER MINIMUM MAXIMUM UNIT DEFAULT Lo 999 9999 selected by operator O Upper range limit of linear input PARAMETER MINIMUM MAXIMUM...

Page 15: ...ue is no the operator may still protect parameters from unauthorized access by using a password The password value is a number that is set by programming the value of the parameter PASS cF s2 no Fig 7 6 PASS The password is an integer positive number PARAMETER MINIMUM MAXIMUM DEFAULT PASS 0000 9999 0000 If the value is 0000 or a discrete input for unauthorized protection is configured the password...

Page 16: ...then waits for another alarm to be selected and its parameters reprogrammed 8 3 Alarm parameter tree general view uSE Fig 8 1 Depending on the value of the parameter uSE the alarm parameter tree may change automatically 8 4 Alarm parameter programming When an alarm is programmed first it should be either enabled or disabled via the uSE parameter parameter uSE VALUE MEANING no Alarm not used YES Al...

Page 17: ...red inputs from 1 to 8 8 6 Alarm type The parameter tYPE is used for defining alarm type parameter tYPE VALUE COMMENT __g Upper limit alarm type 7__ Lower limit alarm type _g7_ Window type alarm active between limits 7__g Inverted window type alarm active outside the limits 8 6 1 Upper limit alarm type When the parameter tYPE value is __g the parameter tree becomes uSE YES inP tYPE __g AlL hYSt ho...

Page 18: ... of the alarm output 8 6 1 4 Relay connected to alarm output parameter outP VALUE COMMENT nonE No relay is assined to alarm output only front panel LED is used rEL1 rEL8 Relay number Only the actually mounted relays are available Relay K9 if installed cannot be assigned to an alarm output but is used to signal system failure Be aware that it might be activated not only by the alarm but also becaus...

Page 19: ...6 outP The parameters hYSt hoLd and outP have the same meaning as for upper and lower limit alarm Fig 8 7 The following parameters are to be programmed 8 6 3 1 Lower alarm window limit parameter LOL PARAMETER MIN MAX UNIT DEFAULT LOL 999 9999 depending on the selected input in inP 0000 8 6 3 2 Upper alarm window limit parameter hIL PARAMETER MIN MAX UNIT DEFAULT hIL 999 9999 depending on the selec...

Page 20: ...r values rnfL alarm limit is lower than the lowest measurable input value Increase the AlL or LOL value rnfH alarm limit is higher than the highest measurable input value Decrease the AlL or LOL value HYSt alarm limits are inside the measurable range but the hysteresis value is outside the input measurement range Decrease hysteresis value or change an alarm limit 9 PROGRAMMING OF THERMOCOUPLE COLD...

Page 21: ...ed in Auto mode 6 To hide display the dot of the current channel press while operating in Pseudo manual mode The inputs that are set to be skipped on the display in Auto mode are still measured and the alarms assigned to them continue to function as usual 12 EXTERNAL SWITCHING OF DISPLAYED DEVICE INPUT Discrete input 1 is used for easier remote displayed input change If the device is in Auto mode ...

Page 22: ...ia and When the device is still capable of some operation and the failure does not concern Configuration the failure message may be temporarily suppressed by pressing After that the display may be used in the normal way Five minutes after the last key pressing the failure message will reappear if failure is still present To display the failure message again press the same key that hides it Relay K...

Page 23: ... the first message hits to line or sensor break while the second message suggests line or sensor insulation failure If the failure message is for an input that is not used no sensor connected this input may be disabled in the configuration see 7 4 1 14 4 Message type Er This message may appear only while programming is exited see 6 12 14 5 Message type FL This message may appear only while program...

Page 24: ...0 information about an input in1 in2 FF FF no such input FF FE out of the ADC range FF FD ADC overflow FF FC ADC underflow x1 x2 measured input value x1 MSB х2 LSB v x1 x2 4 if v 9999 then v 10000 v measured value v 0 1x2 mod 4 15 2 ASCII communication protocol 15 2 1 RS485 Baud rate 4800 Data bits 8 Parity control bit even Stop bits 1 15 2 2 Commands and answers command format x1 t pr data cs CR ...

Page 25: ...04 ADC underflow 05 data overflow 14 invalid command format 15 bad data IC invalid combination type parameter data data 000p commands for reading measured value of analog input sddd answers tocommands forreadingmeasuredvalueofanaloginput 0000 commands for reading relay state 00hh command for changing state of all relays 00hh answers to commands for reading changing state of all relays 000n command...

Page 26: ... channel controller consists of 1 input 1 high or low level type alarm and 1 electromechanical relay In this way up to 8 ON OFF controllers may be programmed into one device The two state ON OFF control has the static characteristics shown on Fig 16 2 This is the same as the one of the alarms of chapters 8 5 1 and 8 5 2 Fig 16 2 Fig 16 3 The relay is switched on and off at exceeding falling below ...

Page 27: ...y in the middle of DB The structure of one channel of a duplex ON OFF control system is shown on Fig 16 5 Fig 16 5 When duplex ON OFF is needed 2 relay outputs have to be assigned to 2 alarms and both alarms have to be assigned to 1 measurement input Set alarm parameters in order to achieve the necessary values for SP DB HYST1 and HYST2 bearing in mind the following dependencies ALL1 SP DB 2 ALL2 ...

Page 28: ...PARAMETER PROGRAMMING 16 9 PROGRAMMING OF THERMOCOUPLE COLD JUNCTION TEMEPERATURE DEFAULT VALUE 21 10 PROGRAMMING OF THE DURATION EACH INPUT STAYS ON THE DISPLAY 21 11 SKIPPING INPUTS IN THE AUTO MODE DISPLAYING SEQUENCE 21 12 EXTERNAL SWITCHING OF DISPLAYED DEVICE INPUT 21 13 DEVICE INFORMATION 21 14 FAILURE MESSAGES 22 15 COMMUNICATION PROTOCOL 23 16 DEVICE APPLICATION 26 ...

Reviews:

No comments