Delta DVP-SS2

DVP-ES2/EX2/EC5/SS2/SA2/SX2/SE&TP Operation Manual - Programming
4-14
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)
BF
END 1
0D (Hex)
END 0
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)
CD
Data (Coils Y043…Y034)
6B
Data (Coils Y053…Y044)
B2
Data (Coils Y063…Y054)
0E
Data (Coils Y070…Y064)
1B
Error Check (LRC)
E5
END 1
0D (Hex)
END 0
0A (Hex)