Yaskawa Ladder Works Programming Manual - Manual (Page 201)

9.8 Receive Message Function (MSG-RCV)
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■ Status (PARAM01)
Output the status of the transmission unit. See 5.5.1."Parameters" of "Status (PARAM01)" for
details.
■ Called Station # (PARAM02)
The station number of sending side is output.
■ Function Code (PARAM04)
Output the MEMOBUS function code received. Refer to Table 9.13.
Table 9.13 Function Codes
Function Code Setting
00H Unused ×
01H Read coil status ○
02H Read input relay status ○
03H Read contents of holding register ○
04H Read contents of input register ○
05H Change status of single coil ○
06H Write into a single holding register ○
07H Unused ×
08H Loop-back test ○
09H Read contents of holding register (expanded) ○
0AH Read contents of input register (expanded) ○
0BH Write into holding register (expanded) ○
0CH Unused ×
0DH Discontinuous readout of holding register (expanded) ○
0EH Discontinuous write into holding register (expanded) ○
0FH Change status of a multiple coil ○
10H Write into a plurality of holding register ○
11H to 20H Unused ×
21H to 3FH System reserved ×
40H to 4FH System reserved ×
50H to Unused ×
Note : The MB, MW, IB, and IW registers can be used respectively as the coil, holding register,
input relay, and input registers during slave operation.
■ Data Address (PARAM05)
The data address requested by the sending side is output.
■ Data Size (PARAM06)
The data size (number of bits or number of words) of the requested read or write is output.
■ Called CPU # (PARAM07)
The called CPU NO. is output.
■ Coil Offset (PARAM08)
Set the offset word address of the coil. This is valid in the case of function codes 01H, 05H, and
0FH.