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2.6 Communications with a Mitsubishi PLC (A-compatible 1E Frame protocol)
Message Functions
2-132
COMMAND
These bits indicate the processing command of the MSG-RCVE function.
* MR_SEND is executed after M_REC is executed.
PARAMETER
When RESULT is 4 (FMT_NG: parameter formatting error), these bits will indicate an error code from the
following table. For any other value, the bits will contain the connection number.
Detail Error Code (PARAM02 and PARAM03)
These parameters give the detail error code.
7
REC_NG
A data reception error (error detected in the lower-layer program)
occurred.
Code (Hex)
Abbreviation
Meaning
1
U_SEND
General-purpose message transmission (for no-protocol communi-
cations)
2
U_REC
General-purpose message reception (for no-protocol communica-
tions)
3
ABORT
Forced abort
8
M_SEND
MEMOBUS command transmission: Completed when response is
received.
9
M_REC
∗
MEMOBUS command reception
C
MR_SEND
∗
MEMOBUS response transmission
RESULT
Code (Hex)
Meaning
When RESULT = 4 (FMT_NG:
Parameter Formatting Error)
00
No error
01
Connection number out of range
02
Watchdog error for MEMOBUS response
03
Error in number of retries setting
04
Error in cyclic area setting
05
CPU number error
06
Data address error
07
Data size error
08
Function code error
Others
Connection Number
Processing
Result Value
(PARAM00)
Detail
Error
Code
Error Description
Description
81
hex
1
Function code error
An unused function code was received.
Check the function code of the remote station.
82
hex
2
Address setting error
The setting of one or more of the following parameters is out
of range. Check the settings.
PARAM14 and PARAM15 (Data Address)
PARAM20 and PARAM21 (Coil Offset)
PARAM26 and PARAM27 (Hold Register Offset)
83
hex
3
Data size error
The data size for receiving is out of range.
Check the data size at the remote station.
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Code
Abbreviation
Meaning