Yaskawa Ladder Works Programming Manual Bedienungsanleitung PDF herunterladen (Seite 193)

9.7 Send Message Function (MSG-SND)

9-18

REQUEST

1 = Request

0 = Completion of receipt report

■ Called Station # (PARAM02)

Serial

1～254 : Message is sent to the station of designated device address.

■ Function Code (PARAM04)

The MEMOBUS function code to be sent is set. Refer to Table 9.9.

Table 9.9 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

(× : cannot be set, ○ :can be set)

Note : Only MW (MB) can be used as the sending/receiving register during master operation. The

MB, MW, IB, and IW registers can be used respectively as the coil, holding register, input

relay, and input registers during slave operation.

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