DVP-ES2-EX2-SS2-SA2-SX2-Operation Manual

DVP-ES2/EX2/SS2/SA2/SX2/SE Operation Manual - Programming
6. When RS instruction is applied for communication between PLC and peripheral devices on
COM2 RS-485, usually STX (Start of the text) and ETX (End of the text) have to be set into
communication format. In this case, b8~10 of D1120 should be set to 1, so that users can set
up STX/ETX as user-defined or system-defined by using M1126, M1130, and D1124~D1126.
For settings of M1126 and M1130, please refer to the following table.
M1126
0
1
M1130
0 1
D1124: user defined
D1124: H 0002
D1125: user defined
D1125: H 0003
D1126: user defined
D1126: H 0000(no setting)
D1124: user defined
D1124: H 003A(’:’)
D1125: user defined
D1125: H 000D(CR)
D1126: user defined
D1126: H 000A(LF)
7. Example of setting communication format in D1120:
Communication format:
Baud rate: 9600, 7, N, 2
STX : “: “
ETX1 : “CR”
ETX2 : “LF”
Check to the table in point 4 and the set value H788 can be referenced corresponding to the
baud rate. Set the value into D1120.
b15
b0
D1120 0 0 0 0 0 1 1 1 1 0 0 0 1 0 0 0
0
N/A
7 8 8
M1002
MOV H788 D1120
When STX, ETX1 and ETX2 are applied, care should be taken on setting the ON/OFF status
of M1126 and M1130.
8. D1250(COM1)、D1253(COM3) communication error code:
Value
H0001
H0002
H0003
H0004
Error Description
Communication time-out
Checksum error
Exception Code exists
Command code error / data error
3-220