Delta DVP-EX2 - Page 389

DVP-ES2/EX2/EC5/SS2/SA2/SX2/SE&TP Operation Manual - Programming
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Special register Function
D1038
Delay time of data response when PLC is SLAVE in COM2, COM3
RS-485 communication, Range: 0~10,000. (unit: 0.1ms).
By using EASY PLC LINK in COM2, D1038 can be set to send next
communication data with delay. (unit: one scan cycle)
D1109
COM3 (RS-485) communication protocol. Refer to the following table in
point 4 for protocol setting.
D1169
The specific end word to be detected for RS instruction to execute an
interruption request (I160) on COM3 (RS-485).
Supported c
ommunication instructions: RS
D1252
COM3 (RS-485) Communication time-out setting (ms). If users set up
time-out value in D1252 and the data receiving time exceeds the
time-out value, M1319 will be set ON and the error code K1 will be
stored in D1253. M1319 has to be reset manually when time-out status
is cleared.
D1253 COM3 (RS-485) communication error code
D1255 COM3 (RS-485) PLC communication address when PLC is Slave.
4. Corresponding table between COM ports and communication settings/status.
COM1 COM2 COM3 Function Description
Protocol
setting
M1138 M
1120 M1136 Retain communication setting
M1139 M1143 M1320 ASCII/RTU mode selection
D1036 D1120 D1109 Communication protocol
D1121 D1121 D1255 PLC communication address
Sending
request
- M
1161 - 8/16 bit mode selection
- M1121 - Indicate transmission status
M1312 M1122 M1316 Sending request
- M1126 -
Set STX/ETX as user/system defined. (RS)
RS)RSTX/ETX
- M1130 - Set STX/ETX as user/system defined. (RS)
- D1124 - Definition of STX (RS)
Sending
request
- D
1125 - Definition of ETX1 (RS)
- D1126 - Definition of ETX2 (RS)
D1249 D1129 D1252 Communication timeout setting (ms)
- D1122 - Residual number of words of transmitting data
- D1256 - Store the sent data of MODRW instruction.