Delta DVP-ES2/EX2/SS2/SA2/SX2/SE Manual

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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) 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)

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