Rockwell Automation 1764-xxxx MICROLOGIX 1500 PROGRAMMABLE CONTROLLERS - Manual (Page 70)

Publication 1764-UM001B-EN-P - April 2002
4-2 Communication Connections
For more information about communications, see Understanding
Communication Protocols on page E-1.
Communications Toggle
Push Button The Communications Toggle Push Button is located on the processor.
You must remove processor door or DAT to access the
Communications Toggle Push Button.
Use the Communications Toggle Push Button to change from the
user-defined communication configuration to the default
communications configuration and back. The Default
Communications (DCOMM) LED operates to show when the
controller is in the default communications mode (settings shown on
page 4-1).
TIP
The default configuration is present when:
•
The controller is powered-up for the first time.
•
The communications toggle push button specifies
default communications (the DCOMM LED is on).
•
An OS upgrade is completed.
TIP
The Communication Toggle Push Button must be
pressed and held for two seconds to activate.
The Communication Toggle Push Button only affects
the communication configuration of Channel 0.
DC INPUTS COMMS
24V SINK/SOURCE
DC/RELAY OUT
24V SOURCE