Communications Protocols And Message Communications - YASKAWA MP920 User Manual

3.1.2

Communications Protocols and Message Communications

There are two message communications modes: The MEMOBUS message mode for com-
mand-response communications, and a general-purpose message mode for one-way commu-
nications.
The various communications protocols belong to either of these message communications
modes.
Message
Communications Mode
MEMOBUS Message
Mode
General-purpose
Message Mode
3.1 Overview of Communications Protocols
Communications
Protocols
Extended MEMOBUS
MEMOBUS
MELSEC-A
OMRON
No protocol
(Through mode)
3-3
Remarks
Command-response commu-
nications
One-way communications 3