Appendix A System Functions
A.1.3 Parameter Details
A-4
A.1.3 Parameter Details
Processing Result (PARAM00)
The processing result is output to the higher-place byte of PARAM00. The lower-place byte
is for system analysis.
• 00: Processing in progress (BUSY)
• 10: Processing completed (COMPLETE)
• 8: Error occurred (ERROR)
Status (PARAM01)
PARAM01 contains the status of the communications unit.
1. Bit Assignments
Error
Code
Error Details
81 Function code error An attempt was made to send an undefined func-
tion code, or an undefined function code was
received.
82 Address setting error The data address, coil offset, input relay offset,
input register offset, or holding register offset
setting is outside the allowable range.
83 Data size error The size of the sent or received data is outside
the allowable range.
84 Line number setting error The line number setting is outside the allowable
range.
85 Channel number setting
error
The channel number setting is outside the allow-
able range.
86 Station address error The station number setting is outside the allow-
able range.
88 Communications unit error An error response was returned from the com-
munications unit. See Status (PARAM01)
below.
89 Device selection error An unavailable device was selected.
PARAMETER
COMMAND
RESULT
REQUEST
F 9 8 65432107ABCDE
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