Delta DVP-ES2 - Manual (Page 581)

3 . I n s t r u c t i o n S e t
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Points to note:
Relative flags and special D registers of COM2/COM3 :
COM2 COM3 Function Description
M1120 M1136 Retain communication setting
M1143 M1320 ASCII/RTU mode selection
D1120 D1109 Communication protocol
Protocol
setting
D1121 D1255 PLC communication address
M1122 M1316 Sending request Sending
request D1129 D1252 Communication timeout setting (ms)
Receiving
completed
M1127 M1318 Data receiving completed
- M1319 Data receiving error
- D1253 Communication error code
M1129 - Communication timeout setting (ms)
M1140 -
COM2 (RS-485) MODRD/MODWR/MODRW
data receiving error
M1141 -
MODRD/MODWR/MODRW parameter error
(Exception Code exists in received data)
Exception Code is stored in D1130
Errors
D1130 -
COM2 (RS-485) Error code (exception code)
returning from Modbus communication