Yaskawa MP920 Communications Module - Manual (Page 137)

6.6 217IF Communications Protocols
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6.6 217IF Communications Protocols
The 217IF Module supports Yaskawa’s standard MEMOBUS communications protocol, as well
as various other communications protocols.
As standard functions, the MELSEC communications protocol is provided for connection with
controllers manufactured by Mitsubishi Electric Corporation, and the OMRON communications
protocol is provided for connection with Programmable Controllers manufactured by OMRON
Corporation.
6.6.1 MEMOBUS Communications
MEMOBUS communications are message transmissions using the MEMOBUS protocol.
The following table shows the correspondences between the MEMOBUS commands and
registers.
* 1. MEMOBUS Reference No.
This is the leading number used by a standard Yaskawa MEMOBUS
protocol message. The leading number in the above range is allocated
to coils, input relays, input registers, and holding registers. The first
digit is the register type, and the remaining digits is the leading num-
ber beginning from 1.
* 2. MEMOBUS Command
This is the command number set in the MEMOBUS protocol.
* 3. Leading No.
This is the leading number used by the MP900. All numbers start from
0 (zero).
* 4. Register No.
This is the number of each register corresponding to the leading num-
ber. Register number offsets can be specified for coils, input relays,
input registers, and holding registers by the MSG-SND and MSG-
RCV system functions.
For example, with Yaskawa MP-series:
Table 6.7 Correspondences between MEMOBUS Reference and Register Numbers
Type MEMOBUS
Reference No. *1
MEMOBUS
Command *2
MP9††
Leading No. *3 Register No. *4
Coil 000001 to
0††††† 01H, 05H, 0FH 000000 and
higher MB000000 and
higher
Input Relays 100001 to
1††††† 02H 00000 and higher IB00000 and
higher
Input Registers 300001 to
3††††† 04H 00000 and higher IW0000 and
higher
Holding Registers 400001 to
4†††††
03H, 10H 00000 and higher MW00000 and
higher