Chapter 14 RS-422/485C function of K200S MASTER-K
14-6
14.7 Communication status flag
The D4400 ~ D4454 (55 words) are reserved for special register and they contain the error code,
error count, and error information.
14.7.1 Error code (D4400 ~ D4415)
The error code of all stations (32 stations) are stored in the D4400 ~ D4415 (16 words).
Each error code occupies 1 byte, and 1 word contains 2 error codes. See the chapter
13.8 for the detail information.
Station number Device Station number Device Remark
0, 1 D4400 16, 17 D4408
2, 3 D4401 18, 19 D4409
4, 5 D4402 20, 21 D4410
6, 7 D4403 22, 23 D4411
8, 9 D4404 24, 25 D4412
10, 11 D4405 26, 27 D4413
12, 13 D4406 28, 29 D4414
14, 15 D4407 30, 31 D4415
Odd number :
upper byte
Even number :
lower byte
14.7.2 Error count (D4416 ~ D4431)
The CPU has a error counter that counts how many times error occur in each station
number. The error count is stores at the special device (D area) as following table.
Station number Device Station number Device Remark
0, 1 D4416 16, 17 D4424
2, 3 D4417 18, 19 D4425
4, 5 D4418 20, 21 D4426
6, 7 D4419 22, 23 D4427
8, 9 D4420 24, 25 D4428
10, 11 D4421 26, 27 D4429
12, 13 D4422 28, 29 D4430
14, 15 D4423 30, 31 D4431
Odd number :
upper byte
Even number :
lower byte
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