2.7 Communications with a Mitsubishi PLC (QnA-compatible 3E Frame Protocol)
Message Functions
2-178
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.
Code (Hex) Abbreviation Meaning
1 U_SEND General-purpose message transmission (for no-protocol communications)
2 U_REC General-purpose message reception (for no-protocol communications)
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.
84
hex 4
Circuit number set-
ting error
The circuit number is out of range. Check the circuit number
(Cir-No) in the MSG-RCVE function.
85
hex 5
Channel number set-
ting error
The channel number for the communications buffer is out of
range. Check the communications buffer channel number
(Ch-No) in the MSG-RCVE function.
86
hex 6
Connection number
error
The connection number is out of range. Check PARAM10
(Connection Number).
Continued on next page.
To Next Page
Loading...
