User`s manual

ManualsBrandsSharp ManualsNetwork CardJW-21MN

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7-36

After receiving this command, the PLC02 will return a response as follows:

: : 0 2 # 5 S R R 0 0 7 0 3 0 2 5

0 2 ? 5 S R R 0 0 7 0 3 0 1

Command detail

Response time: 50 ms

Slave station number

…

Sum all the bytes of data from the slave station number until the end

of the command details as ASCII codes. Then take the 2's complement

of that number. This is the checksum.

A command sent from a host computer (to specify the area for checksum)

The host computer receives this response and adds all the bytes of data

from the slave station number until the end of the response data as ASCII

codes. Then, it adds the checksum in this case 25(H) to the data. If the

lower two digits are 00(H) (300(ASCII Hex)), the host computer will

determine that the response is appropriate.

+ Checksum code

Checksum

code

Then, the command will be as follows:

: : 0 2 ? 5 S R R 0 0 7 0 3 0 1 D 8

Checksum code

ASCII code

[Complement of 2]

Invert all binary bits (0 -> 1, 1 -> 0), and add 1. This is the 2's

complement number. 28

(H)

→ 00101000

↓ Bit inversion

11010111

↓ Add 1

11011000 → D8

(H)

…

[Ex.] To set relay 007030 on the PLC02 (response time: 50 ms)

30(H)

328(H)

↓

28(H)

↓

D8(H)

30(H)

2DB(H)

25(H)

300(H)

Complement of 2