Appendix G MSG-SND/MSG-RCV Functions (Ethernet)
G.1 Message Transmit Function (MSG-SND)
A-79
( 3 ) Status (PARAM01)
Outputs status of the communication section (communication device).
The following figure illustrates bit assignment. Bit assignment details are listed in the table below.
( a ) REQUEST (request)
Outputs whether MSG-SND function is requesting a process.
( b ) RESULT (result)
Outputs an execution result of the MSG-SND function
( c ) COMMAND (command)
Outputs a process command for the MSG-SND function. The executed process contents can be found according to the
command.
FEDCBA9876543210
Bit Fit
(a) REQUEST
Bits C to E
(b) RESULT
Bits 8 to B
(c) COMMAND
BIts 0 to 7
(d) PARAMETER
Bit State Contents
1 Requesting processing
0 The acceptance of process request is completed
Code Abbreviation Meaning
0 CONN_NG In Ethernet communications, transmit error or connection error is complete
1 SEND_OK Normal transmission complete
2 REC_OK Normal reception complete
3 ABORT_OK Forced abort complete
4 FMT_NG Parameter format error
5 SEQ_NG Command sequence error
6 RESET_NG Reset state
7 REC_NG Data reception error (error detected in the lower layer program)
Code (Hex) Abbreviation Meaning
1 U_SEND General-purpose message transmission
2 U_REC General-purpose message reception
3 ABORT Forced abort
8 M_SEND
MEMOBUS command transmission: Complete when response is received
(for MEMOBUS protocol)
9 M_REC
MEMOBUS command reception: Accompanies a response transmission
(for MEMOBUS protocol)
C MR_SEND MEMOBUS response transmission (for MEMOBUS protocol)
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