SMC Networks HRL100-A, Руководство по эксплуатации

Страница: 37 / 56

HRX-OM-W069
Chapter 3 Serial communication
HRL Series 3.10 Checksum calculation method
3-11

Calculation example
Example) Change circulating fluid set temperature 23.4 ° C
Sending data 0106004000EA
○
Slave Address : No.1
○
Function : No.06
○
Writing address : 0040h
○
Writing data : 00EAh
Data No. 1st value 2nd value 3rd value 4th value 5th value 6th value
Data
contents
0001h 0006h 0000h 0040h 0000h 00EAh
No Classification Contents Result
1
CRC
message for
calculation
0106000B00FE -
2
Calculation
Perform (1) to (4) for the 1st value (0001h) and then,
perform (5).
807Eh
3 Perform (6) for 2nd value (0006h) and then, perform (5). 2280h
4 Perform (6) for 3rd. value (0000h) and then, perform (5). A023h
5 Perform (6) for 4th value (0040h) and then, perform (5). 29E0h
6 Perform (6) for 5th value (0000h) and then, perform (5). 8828Eh
7 Perform (6) for 6th value (00EAh) and then, perform (5).
9109h
(CRC)
8
Addition to the
sent message
0106004000EA0991

1
-

1
When incorporating it into the message, set it in order of low byte and high byte.