Omron SYSDRIVE 3G3MV SERIES - Outline of Protocol Macro Function

7-34
D RS-422 (4-wire)
Communications Board
RS-422/485
Interface
Code Pin No.
Frame
9-pin, D-sub connector
(Cable side: Male)
3G3MV
Code
3G3MV
Code
Control
circuit termi-
nal block
(commu-
nications
terminals)
Control
circuit ter-
minal block
(commu-
nications
terminals)
B500-AL001 Link Adapter
Pin No.
Code
RS-422
Interface
Code
Pin No.
Shielded line
Shielded line
Shielded line
Code
Pin No.
Note Turn the terminal resistance of all the Inverters to ON for RS-422 communications. 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 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.
Communications Chapter 7