2.7 Communications with a Mitsubishi PLC (QnA-compatible 3E Frame Protocol)
Message Functions
2-163
Status (PARAM01)
This parameter gives the status of the communications device.
The following figure shows the bit assignments and it is followed by a detailed description of each assign-
ment.
REQUEST
This bit gives the status of the processing request for the MSG-SNDE function.
RESULT
These bits give the execution results of the MSG-SNDE function.
COMMAND
These bits indicate the processing command of the MSG-SNDE function.
* MR_SEND is executed after M_REC is executed.
Bit Status Meaning
1 Processing is being requested.
0 Processing request has ended.
Code Abbreviation Meaning
0 CONN_NG
The message send failed or connection ended with an error in Ethernet communi-
cations.
1 SEND_OK The message was sent normally.
2 REC_OK The message was received normally.
3 ABORT_OK The request to abort execution was completed.
4 FMT_NG A parameter formatting error occurred.
5 SEQ_NG A command sequence error occurred.
6 RESET_NG A reset occurred.
7 REC_NG A data reception error (error detected in the lower-layer program) occurred.
Code 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
FEDCBA9876543210
Bits 0 to 7:
PARAMETER
Bits 8 to B:
COMMAND
Bits C to E:
RESULT
Bit F:
REQUEST
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