¡Descarga RTC40 Comunicación con PLC y más Guías, Proyectos, Investigaciones en PDF de Electrotecnia solo en Docsity!
RTC48 Communication Quick Start Guide
RS-
TWDXCAT3RJ TWDXCAT3RJ TWDXCAT3RJ TWDXCAT3RJ
Safety Information
Read these instructions carefully and look at the equipment to become familiar with the device before trying to install, operate, or maintain it. The following special messages may appear throughout this documentation or on the equipment to warn of potential hazards or to call attention to information that clarifies or simplifies a procedure.
Please Note Electrical equipment should be installed, operated, serviced, and maintained only by qualified personnel. No responsibility is assumed by Schneider Electric for any consequences arising out of the use of this material. This document is not intended as an instruction manual for untrained persons. A qualified person is one who has skills and knowledge related to the construction and operation of electrical equipment and its installation, and has received safety training to recognize and avoid the hazards involved.
Tap junction box (Line end adapter and Line Pre-polarisation)
The tap junction box TWDXCAT3RJ (sold separately) has a built-in line end adapter (RC 120 Ω, 1 nF). The junction box is Din Rail Mounting. This junction box is for easy set up of RJ45 terminal and for line end termination.
Step Action
Repeat the above step for each device. Use the switches of the TAP as integrated end line of the device for the end line of the last device.
Connect the coaxial cable on the port L1 of the Modbus TAP (TWDXCAT3RJ) junction. The port L2 is used to connect the temperature controller. The port L3 is used to connect the port L1 of the second Modbus TAP junction. Use the switches of the tap configure the end line impedance and polarization.
Item Name
1 Programmable logic controller 2 RTC48 Temperature controller (Can connect up to 31 RTC48 units in serial communication (Modbus))
CAUTION indicates a potentially hazardous situation, which, if not avoided, can result in injury or equipment damage.
CAUTION
1. Integration in a Network (Serial Communication)
RTC
No. 1
RTC
No. 2
RTC
No. 3
RTC
No. 4
RTC
No. 31
3. Configuration with PC (Console communication)
Item Name
1 RTC48 console port
Note: Console communication only allows 1 temperature controller to be connected at a time.
RTCCBL communication cable PC USB port
RTC48 bottom view
4. Parameters Setting Procedure
The following proceduce explains how to change the settings of each communication parameter. Step Action Remarks
Press the key for approx. 3 seconds while
pressing the key in the PV/SV display mode.
The display unit proceeds to Auxiliary function setting mode.
Use the keys to set the following communication protocol: : RTC protocol (Default) : Modbus ASCII mode : Modbus RTU mode.
4 Press the key, then use the keys to set the instrument number of the controller individually when communicating by connecting plural instruments. 0...95 (Default: 0).
Use the keys to set the communication speed equal to that of the host computer. : 2400 bps : 4800 bps : 9600 bps : 19200 bps (Default)
Press the key to confirm the setting and to return to PV/SV display mode.
Press the key, then use the keys to set the data bit and parity. : 8 bits/No parity : 7 bits/No parity : 8 bits/Even (Default) : 7 bits/Even : 8 bits/Odd : 7 bits/Odd
Press the key, then use the keys to set the stop bit. : 1 (Default) : 2
Press the key twice.
Controller
Terminal block pin
YA (-) YB (+) RTC48 16 17
SG
Specifications Description
Cable length
Communication line Communication method Communication speed
EIA RS
Half-duplex communication
2.2 Specifications
1.2 km (maximum) Cable resistance: 50 Ω or less (terminators are not necessary, but if used, use 120 Ω or more on one side.)
9600 bps (2400, 4800, 19200 bps) selectable by keypad Synchronization method Start-stop synchronization Code ASCII, Hexadecimal value Error correction LRC (Modbus ASCII), CRC-16 (Modbus RTU)
RJ
CAUTION
2. Wiring
If both sides of the shielded wire are connected to the SG terminal, the circuit is closed between the shielded wire and the ground. As a result, current will run through the shielded wire and this may cause noise. Be sure to ground the SG terminal.
1 Master 2 Shielded twist per cable 3 Zelio Temperature Controller 4 RS485 Interface
UNINTENDED EQUIPMENT OPERATION
Connect only 1 side of the shielded wire (TWDXCAFJ010) to the Shielding Ground (SG) terminal so that current cannot flow to the shielded wire. Failure to follow this instruction can result in equipment damage.
2.1 Shielded wire
YA (+)
YA (–)
SG
Header (:)
Salve address
Function code
Data
Error check LRC
Delimiter (LF)
Delimiter (CR)
5. Communication procedure
Communication starts with command transmission from the host computer (Master) and ends with the response of the RTC48 (Slave).
- Response with data When the master sends the reading command, the slave responds with the corresponding set value or current status.
- Acknowledgement When the master sends the setting command, the slave responds by sending the acknowledgement after the processing is terminated.
- Negative acknowledgement When the master sends non-existent command or value out of the setting range, the slave returns the negative acknowledgement.
- No response The slave does not respond to the master in the following cases:
- Global address, Broadcast address (Modbus protocol) is set.
- Communication error (framing error, parity error)
- Checksum error (RTC48 protocol)
- LRC discrepancy (Modbus ASCII mode)
- CRC-16 discrepancy (Modbus RTU mode)
Master Slave Command Data
Command Acknowledgement
Command Negative Acknowledgement
Command
No response
Master side (Notice on programming) Set the program so that the master can disconnect the transmitter from the communication line within a 1 character transmission period after sending the command in preparation for reception of the response from the slave. To avoid the collision of transmissions between the master and the slave, send the next command after carefully checking that the master received the response.
Slave side When the slave starts transmission through the RS-485 communication line, the slave is arranged so as to provide an idle status (mark status) transmission period of 1 or more characters before sending the response to ensure the synchronization on the receiving side. The slave is arranged so as to disconnect the transmitter from the communication line within a 1 character transmission period after sending the response.
5.1 RS-485 communication timing
6.1 Transmission mode
There are 2 transmission modes (ASCII and RTU) in Modbus protocol.
6.2 ASCII mode
Hexadecimal (0 to 9, A to F), which is divided into high order (4-bit) and low order (4-bit) out of 8-bit binary data in command is transmitted as ASCII characters. Data format Start bit : 1 bit Data bit : 7 bits Parity : Even (No parity/Odd), Selectable Stop bit : 1 bit (2 bits), Selectable Error detection : LRC (Longitudinal Redundancy Check) Data interval : 1 second or less
(1) Message configuration ASCII mode message is configured to start by Header [: (colon)(3AH)] and end by Delimiter [CR (carriage return) (0DH) + LF (Line feed)(0AH)].
Slave address Slave address is an individual instrument number on the slave side and is set within the range 0 to 95 (00H to 5FH). The master identifies slaves by the slave address of the requested message. The slave informs the master which slave is responding to the master by placing its own address in the response message. Slave address 0 (00H, broadcast address) can identify all the slaves. However slaves do not respond.
6. Modbus protocol
1
2 3
The display unit proceeds to Communication protocol selection.
Press the key to confirm the setting.
03H/06H OUT1 high limit 001CH OUT1 low limit value...100%
03H/06H OUT1 low limit 001DH 0...OUT1 low limit value %
03H/06H OUT1 ON/OFF hysteresis 001EH 0.1...100.0 °C, Vdc voltage 1...1000, current input, Decimal point ignored
0000H: Air cooling 0001H: Oil cooling 0002H: Water cooling
03H/06H (^) OUT2 cooling mode 001FH
03H/06H OUT2 high limit 0020H OUT2 low limit value...100%
03H/06H OUT2 low limit 0021H 0...OUT2 low limit value %
03H/06H OUT2 ON/OFF hysteresis 0022H 0.1...100.0 °C, Vdc voltage 1...1000, current input, Decimal point ignored
Modbus Function Code
Parameter Names
Description Relative Address
Holding Register
Setting Range
03H/06H Alarm 1 type 0023H
03H/06H Alarm 2 type 0024H
03H/06H Alarm 1 hysteresis 0025H 0.1...100.0 °C, Vdc voltage 1...1000, current input, Decimal point ignored
The same as Alarm 1 type
03H/06H Alarm 2 hysteresis 0026H 0.1...100.0 °C, Vdc voltage 1...1000, current input, Decimal point ignored
03H/06H Alarm 1 delay time 0029H 0...10000 s
03H/06H Alarm 2 delay time 002AH 0...10000 s
0000H: No alarm action 0001H: High limit alarm 0002H: Low limit alarm 0003H: H/L limits alarm 0004H: H/L limit range 0005H: Process high alarm 0006H: Process low alarm 0007H: High limit w/standby 0008H: Low limit w/standby 0009H: H/L limits w/standby
03H/06H Indication when output OFF 0032H
03H/06H SV rise rate 0033H Set value, Decimal point ignored
03H/06H SV fall rate 0034H Set value, Decimal point ignored
03H/06H Auto/Manual control 0038H
03H/06H Manual control MV 0039H
0000H: OFF indication 0001H: No indication 0002H: PV indication 0003H: PV+ Alarm action
03H/06H Alarm 1 Energized/ 0040H De-energized
03H/06H
oLH oLL HYS
cAcT
oLH oLL HYSb
AL1T
AL2T
A1HY
A2HY
A1dY A2dY PSV
RATU
RATd
MANU
A1LM
A2LM Alarm 2 Energized/ 0041H De-energized
0000H: Automatic control 0001H: Manual control
Set value 0000H: Energized 0001H: De-energized
40066 0000H: Energized 0001H: De-energized
When a carry is generated as a result of the shift, XOR is calculated by X of 3 and the fixed value (A001H). This is assumed as X. If a carry is not generated, go to step 5.
Step Action 1 Initialize the CRC-16 data (assumed as X) (FFFFH). 2 3 4 5 6 7 8 9 Calculate exclusive OR (XOR) with the 1st data and X. This is assumed as X. Shift X one bit to the right. This is assumed as X.
Repeat steps 3 and 4 until shifting 8 times. XOR is calculated with the next data and X. This is assumed as X. Repeat steps 3 to 5. Repeat steps 3 to 5 up to the last data. Set X as CRC-16 to the end of the message in sequence from low order to high order.
7. Data Address Mapping
A request message from the master is composed of data item, number of data and setting data. A response message from the slave is composed of number of bytes, data and exception codes in negative acknowledgement. The number of data to be dealt with in one message is “1”. Therefore the number of data is fixed as 0001H. The number of response byte is 02H. Effective range of data is -32768 to 32767 (8000H to 7FFFH). Error check : 16-bit data to detect communication errors. Refer to (2) Error check of RTU mode.
(2) Error check of RTU mode After calculating CRC-16 (Cyclic Redundancy Check) from the slave address to the end of data, the calculated 16-bit data is appended to the end of message in sequence from low order to high order. How to calculate CRC- In the CRC-16 system, the information is divided by polynomial series. The remainder is added to the end of the information and transmitted. The generation of polynomial series is as follows. (Generation of polynomial series: X^16 + X^15 + X^2 + 1) :
Modbus Function Code
Parameter Names
Description Relative Address
Holding Register
Setting Range
03H/06H SV 0001H Set value, Decimal point ignored 03H/06H AT/Auto-reset 0003H 0000H: Cancel 0001H: Perform 03H/06H OUT1 proportional band 0004H 0...1000 °C (32...1832 °F) Decimal point ignored 03H/06H OUT2 proportional band 0005H 0...1000 °C (32...1832 °F) Decimal point ignored 03H/06H Integral time 0006H 0... 03H/06H Derivative time 0007H 0... 03H/06H OUT1 proportional cycle 0008H 1... 03H/06H OUT2 proportional cycle 0009H 1... 03H/06H Alarm 1 value 000BH Set value, Decimal point ignored 03H/06H Alarm 2 value 000CH Set value, Decimal point ignored 03H/06H Set value lock 0012H
-100.0...100.0 °C Vdc voltage, current input: -1000...
03H/06H Sensor correction 0015H
0000H: Unlock 0002H: Lock 2 0001H: Lock 1 0003H: Lock 3
03H/06H Overlap/Dead band 0016H -100.0...100.0 °C Vdc voltage, current input: -1000... 03H/06H Scaling high limit 0018H -2000...10000 °C, Decimal point ignored 03H/06H Scaling low limit 0019H -2000...10000 °C, Decimal point ignored 03H/06H Decimal point place 001AH
03H/06H 0.0...10.0 s, Decimal point ignored
SV
AT
P
P
I
d c c A A LocK
So
db
STLH
STLL
dP
FILT (^) PV filter time constant 001BH
0000H: xxxx 0002H: xx.xx 0001H: xxx.x 0003H: x.xxx
Step Action 1 Create a message in RTU mode. 2 3 4 5 6
Add all the values from the slave address to the end of data. This is assumed as X. Make a complement for X (bit reverse). This is assumed as X. Add a value of 1 to X. This is assumed as X. Set X as an LRC to the end of the message. Convert the whole message to ASCII characters.
Exception Code Contents 1 (01H) Illegal function (Non-existent function) 2 (02H) Illegal data address (Non-existent data address) 3 (03H) Illegal data value (Value out of the setting range) 17 (11H) RTC48 error code 4 (Staus unable to be set, for example, AT is performing) 18 (12H) RTC48 error code 5 (During setting mode by keypad operation)
3.5 idle characters
Salve address
Function code Data Error check CRC-
3.5 idle characters
6.3 RTU mode
8-bit binary data in command is transmitted as it is. Data format Start bit : 1 bit Data bit : 8 bits Parity : Even parity (default), No parity, and Odd parity (Selectable) Stop bit : 1 bit (2 bits), Selectable Error detection : CRC-16 (Cyclic Redundancy Check) Data interval : 3.5 characters transmission time or less (1) Message configuration RTU mode is configured to start after idle time is processed for more than 3.5 character transmissions and end after idle time is processed for more than 3.5 character transmissions.
Slave address : The same as that of ASCII mode. Function code : The same as that of ASCII mode. Data : Data depends on the function code.
Function code is used to discern whether the response is normal (acknowledgement) or if any error (negative acknowledgement) has occurred when the slave returns the response message to the master. When acknowledgement is returned, the slave simply returns the original function code. When negative acknowledgement is returned, the MSB of the original function code is set as 1 for the response. For example, when the master sends request message setting 10H to the function code by mistake, slave returns 90H by setting the MSB to 1, because the former is an illegal function. For negative acknowledgement, the exception codes below are set to the data of response message and returned to the master in order to inform it of what kind of error has occurred.
Function code The function code is the command code for the slave to undertake the following action types.
Data Data depends on the function code. A request message from the master is composed of data item, number of data and setting data. A response message from the slave is composed of number of bytes, data, and exception code in negative acknowledgements. The number of data to be dealt with in one message is “1”. Therefore, the number of data is fixed as (30H) (30H) (30H) (31H). Effective range of data is -32768 to 32767 (8000H to 7FFFH). Error check : 2-character data to detect communication errors. Refer to (2) Error check of ASCII mode below. (2) Error check of ASCII mode After calculating LRC (Longitudinal Redundancy Check) from the slave address to the end of data, the calculated 8-bit data is converted to two ASCII characters and are appended to the end of message. How to calculate LRC
Function code Contents
03 (03H) Reading the set value and information from slaves 06 (06H) Setting to slaves
www.schneider-electric.com © 2013 Schneider Electric. All rights reserved. HRB7810101-
Relative Address
Holding Register
Modbus function code
Parameter Names
Setting Range
Direct/Reverse action
0000H: Reverse action 0001H: Direct action AT bias Set value ARW Set value OUT rate-of-change
Backlight 0000H: All are backlit 0001H: PV display backlit 0002H: SV display backlit
0003H: Action indicators backlit 0004H: PV+SV displays backlit 0005H: PV+Action indicators backlit 0006H: SV+Action indicators backlit 03H/06H
03H/06H
03H/06H
03H/06H
03H/06H
03H/06H
PV color 0000H: Green 0001H: Red 0002H: Orange 0003H: When Alarm ON: Green Red
0004H: When Alarm ON: Orange Red 0005H: PV continuous change 0006H: PV continuous change+ Alarm ON, Red 03H/06H PV color range^ Set value, Decimal point ignored 03H/06H Backlight time 0... 06H Key operation change flag clearing
0000H: No action 0001H: Clear all 03H PV (Process Variable)
Current PV (Process variable), Decimal point ignored 03H OUT1 MV OUT1 MV, Decimal point ignored 03H OUT2 MV OUT2 MV, Decimal point ignored 03H SV (When SV rises or falls)
Current SV (Desired value), Decimal point ignored 03H Status flag
0051H
0052H
0053H
0070H
0080H
0081H
0082H
0083H
0085H
03H/06H
coLR
coNT
AT_b ARW oRAT
dPTM
cLRG dPTM
SENS Input type (^) 0000H: K -200...1370 °C 0001H: K -200.0...400.0 °C 0002H: J -200...1000 °C 0003H: R 0...1760 °C 0004H: S 0...1760 °C 0005H: B 0...1820 °C 0006H: E -200...800 °C 0007H: T -200.0...400.0 °C 0008H: N -200...1300 °C 0009H: PL- 0...1390 °C 000AH: C(W/Re5-26) 0...2315 °C 000BH: Pt100 -200.0...850.0 °C 000CH: JPt100 -200.0...500.0 °C 000DH: Pt100 -200...850 °C 000EH: JPt100 -200...500 °C
000FH: K -320...2500 °F
0010H: K -320.0...750.0 °F
0011H: J -320...1800 °F
0012H: R 0...3200 °F
0013H: S 0...3200 °F
0014H: B 0...3300 °F
0015H: E -320...1500 °F
0016H: T -320.0...750.0 °F
0017H: N -320...2300°F
0018H: PL- 0...2500°F
0019H:
C(W/Re5-26) 0 to 4200 °F 001AH: Pt100 -320.0...1500.0 °F 001BH: JPt100 -320.0...900.0 °F 001CH: Pt100 -320...1500 °F 001DH: JPt100 -320...900 °F 001EH: 4...20 mA 001FH: 0...20 mA 0020H: 0...1 V 0021H: 0...5 V 0022H: 1...5 V 0023H: 0...10 V
0044H 40069
0045H 40070
0047H 40072
0048H 40073
004AH 40075
0050H 40081
40134 2 0 : OUT
21 : OUT
22 : Alarm 1 output 23 : Alarm 2 output 26 : Heater burnout alarm output 28 : Overscale 29 : Underscale 210 : Control output OUT/OFF 211 : During AT/Auto-reset 212 : OUT/OFF key function
214 : Auto/Manual control 215 : Change in key operation 24 , 2^5 , 2^7 , 2^13
0: OFF, 1: ON
(DC current output: Not fixed) 0: OFF, 1: ON 0: OFF, 1: ON 0: OFF, 1: ON 0: OFF, 1: ON (When sensor burnout, 0: OFF) 0: OFF, 1: ON 0: OFF, 1: ON 0: ON, 1: OFF 0: OFF, 1: During AT/Auto-reset 0: OUT/OFF function 1: Auto/Manual control 0: Auto, 1: Manual 0: No, 1: Yes Not used, Always 0
Description
03H/06H dIIN Control OUT/OFF function 0037H 0000H: Control output ON 0001H: Control output OFF
