Rockwell Automation 1772-LV Mini-PLC - 2/15 Programmable Controller (Series B) Programming and Operations - Manual (Page 21)

Mini-PLC-2/15 System:
An Overview
Chapter 3
3Ć2
Figure 3.1
MiniĆPLCĆ2/15 Programmable Controller
18404
System Status Indicators
These indicators are located on the front panel of the controller and power
supply. They indicate error conditions and are labeled as:
Processor
Indicator:
red
State: On indicates that the processor is unable to scan the program and I/O.
Off indicates no error.
Response: The processor will cease to operate and outputs will either be
disabled or held in their last state in accordance with the I/O chassis switch
setting.
Memory
Indicator: Red
State: On indicates errors in either:
Memory data
Parity
EPROM
Off indicates no error.
Blinking indicates an error in EPROM.
Response: The processor will halt all operations and disable all outputs.