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

DVP-ES2/EX2/SS2/SA2/SX2/SE Operation Manual - Programming
4.5.2 Command Code: 02, Read Status of Contact (Input point X is included)
Example: Read status of contact Y024~Y070 from Slave ID#01
PC→PLC “: 01 02 05 14 00 25 BF CR LF”
Sent message:
Field Name
ASCII
STX :
Slave Address 01
Command code 02
Starting Address Hi 05
Starting Address Lo 14
Number of Points Hi 00
Number of Points Lo 25
Error Check (LRC)
END 1
END 0
BF
0D (Hex)
0A (Hex)
Assume Number of Points in sent message is n (Dec), quotient of n/8 is M and the remainder is N.
When N = 0, Bytes Count in feedback message will be M; when N≠0, Bytes Count will be M+1.
PLC→PC “: 01 01 05 CD 6B B2 0E 1B E5 CR LF”
Feedback message:
Field Name
ASCII
STX :
Slave Address 01
Command code 02
Bytes Count 05
Data (Coils Y033…Y024)
Data (Coils Y043…Y034)
Data (Coils Y053…Y044)
Data (Coils Y063…Y054)
Data (Coils Y070…Y064)
Error Check (LRC)
CD
6B
B2
0E
1B
E5
END 1
END 0
0D (Hex)
0A (Hex)
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