Outline Of Protocol Macro Function - Omron SYSDRIVE 3G3JV User Manual

Communications
D RS-422A (4-wire)
Communications Board
Code Pin No.
RS-422A/
485
Interface
Frame
9-pin, D-sub connector
(Cable side: Male)
Note Be sure to set the terminal resistance of only the Inverter at each end to ON and that of any other
Inverter to OFF. Refer to 7-1-3 Names of Parts for details.

7-10-3 Outline of Protocol Macro Function

H Protocol Macro Function
• The protocol macro function makes it possible to customize a communications protocol in order to
create a macro according to the specifications of the serial communications port of the general-pur-
pose 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 commu-
nications 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 Mas-
ter.
7-36
B500-AL001 Link Adapter
Shielded line
Pin No. Code
Code
Pin No.
Shielded line
Code Pin No.
RS-422A
Interface
Shielded line
Chapter 7
3G3JV
Code
Control
circuit termi-
nal block
(commu-
nications
terminals)
3G3JV
Code
Control
circuit ter-
minal block
(commu-
nications
terminals)