2.7 Communications with a Mitsubishi PLC (QnA-compatible 3E Frame Protocol)
Message Functions
2-164
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.
* An error response received from the remote device will be formatted in PARAM00 (Processing Result) as follows.
Processing Result (PARAM00): 72 hex (where is the error code)
contains the sum of the completion code sent from the Mitsubishi PLC and 80 hex.
Refer to the following manual for details on completion codes.
Ethernet Unit Manual from Mitsubishi Electric Corporation
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 sent or received.
Check PARAM12 (Function Code).
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 (Remote Station Data Address)
PARAM20 and PARAM21 (Local Station Data Address)
83
hex 3 Data size error
The data size for sending or receiving is out of range. Check
PARAM17 (Data Size).
84
hex 4
Circuit number set-
ting error
The circuit number is out of range. Check the circuit number
(Cir-No) in the MSG-SNDE function.
85
hex 5
Channel number
setting error
The channel number for the communications buffer is out of
range. Check the communications buffer channel number (Ch-
No) in the MSG-SNDE function.
86
hex 6
Connection number
error
The connection number is out of range. Check PARAM10 (Con-
nection Number).
88
hex 8
Communications
device error
An error response was received from the communications
device. Check the connections to the device. Also check to see if
the remote device is ready to communicate.
89
hex 9 Device select error
A device that cannot be used was selected. Check the communi-
cations device type (Dev-Typ) in the MSG-SNDE function.
C245 hex
−
Local station regis-
ter type error
The register type for the local station is out of range. Check
PARAM22 (Local Station Register Type).
8072 hex to
FF72 hex
Remote device
error
∗
An error response was received from the remote station. Check
the error code and remove the cause.
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