Outline Of Protocol Macro Function - Omron SYSDRIVE 3G3MV User Manual

Communications
D RS-422 (4-wire)
Communications Board
Code Pin No.
RS-422/485
Interface
Frame
9-pin, D-sub connector
(Cable side: Male)
Note Turn the terminal resistance of all the Inverters to ON for RS-422 communica-
tions. Refer to page 2-18, Selecting RS-422/485 Termination Resistance for
details.

7-9-3 Outline of Protocol Macro Function

H Protocol Macro Function
·The protocol macro function makes it possible to customize a communications proto-
col in order to create a macro according to the specifications of the serial communica-
tions port of the general-purpose peripheral device.
·The protocol macro function is mainly used for the following jobs.
Creation of message communications frame.
Creation of Send & Recv procedures for message communications frame.
Note This manual uses the terms "message, DSR message, and response" to express
the communications data exchanged.
S Message: A DSR message or response.
S DSR Message: A message sent by the Master for instructions to the Inverter.
S Response: A message that the Inverter returns in compliance with a DSR message
from the Master.
D Creating a Message
·The message can be created according to the communications specifications of the
general-purpose peripheral device (Inverter) as a counterpart.
7-38
B500-AL001 Link Adapter
Shielded line
Pin No. Code
Code
Pin No.
Code Pin No.
RS-422
Interface
Shielded line
Chapter 7
3G3MV
Shielded line
Code
Control
circuit termi-
nal block
(commu-
nications
terminals)
3G3MV
Code
Control
circuit ter-
minal block
(commu-
nications
terminals)