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2-5
IM 34M06P15-03E 2nd Edition: Jan. 31, 2012-00
2.5
Response Error Code
This section describes the response error codes.
z
If Error Response is Returned
This module returns a response as shown below if there is a mismatch in the PDU
during a request or an error during processing.
F020501.VSD
(PDU at Faulty Completion)
Function Code
Data
XX
1-byte
Error Code
1-byte
Figure 2.5.1 PDU at Faulty Completion
The request function code +$80 value is inserted in the function code (XX).
z
Response Error Code
Table 2.5.1 Response Error Code
Error Code
Meaning
Cause
$01
Function Code Error
There is no function code.
$02
Address Error
Out-of-range address was specified.
$03
Amount Error
Out-of-range amount was specified.
$04
Processing Error
Write protect is specified.
$0A
CPU Number Error
Unit ID that is not from 1 to 4 was specified.
$0B
Timeout
CPU specified by the unit ID does not exist.
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