Rockwell Automation 1772-LV Mini-PLC - 2/15 Programmable Controller (Series B) Programming and Operations - Manual (Page 26)

Mini-PLC-2/15 System:
An Overview
Chapter 3
3Ć7
Off indicates that the outputs are de-energized when a fault is detected.
WARNING: Switch number 1 should be set to OFF for most
applications. This allows the processor to turn controlled devices
OFF when a fault is detected. If this switch is set ON, machine
operation can continue after fault detection and damage to
equipment and/or injury to personnel could result.
NOTE: Use the tip of a ballpoint pen to set the switch.
Data Highway Compatibilities
Purpose: To provide communication between two or more processors or other
computerized equipment.
Connections: With the optional Communication Adapter Module (cat. no.
1771-KA) the processors can be connected to the Allen-Bradley Data Highway
System.
WARNING: Do not use the on-line programming feature
when the industrial terminal is connected to a series A
Communication Adapter Module (cat. no. 1771-KA).
Unpredictable machine operation could result and cause
damage to your equipment and/or injury to your personnel.
Optional Features