INST.No.INE-863B KR2S
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Communication Interface
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Instruction Manual
-38-
7-6
Process during abnormality
The followings are responses when there is an error in the message content from the master.
7-6-1
No response
In the following cases, the message is ignored and no response is performed.
1) When a transmission error (overrun, framing, parity, CRC, or LRC) is detected in the message
2) When the slave address in the message is not ones own address
3) When the data interval of the message is long
RTU mode... 28 bits hour or more
ASCII mode … 1 second or more
4) When the transmission parameter does not match
5) When the received message exceeds 512 bytes
*When the slave address is “0” in the writing function, if there is no error in the message, the
message is performed but no response is performed.
7-6-2
Error message response
When the following error is detected in the message content not having any error shown in Para. 7-6-1
from the master, the code showing its error content is responded as the “Error message”.
The format of the error message is as follows.
Slave address
Function code
Function code + 80H
Function code + 80H
02
82H
Error code
03
83H
CRC (L)
04
84H
CRC (H)
06
86H
08
88H
16
90H
Summary of Contents for KR2S
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