Rockwell Automation 1772-LV,D17726.6.1 A and I MNL MINI-PLC-2/15 PROCESSO - Manual (Page 83)

Maintenance and Troubleshooting
Chapter 5
5Ć13
CAUTION: When removing the Mini–PLC–2/15 Processor
from the I/O Chassis, always remove system power and I/O
power first. This will avoid damage to the Processor Module’s
circuitry.
1. Turn Mode Select Switch to the PROG position.
2. Connect an external battery pack to the Processor (Figure 4–4).
3. Remove AC power and I/O power.
4. Remove the Processor from the I/O Chassis and remove the EPROM.
5. Install a blank EPROM in the Processor (Section titled EPROM
Installation, chapter 3). If a blank EPROM is not available, erase the
existing one and reinstall it. See Publication 1770–915 for erasing details.
6. Install the Processor in the I/O Chassis.
7. Restore AC power.
8. Disconnect the external battery pack from the Processor.
9. Connect the 1770–T3 Industrial Terminal and correct the run–time error.
10. Verify proper operation.
11. Program the EPROM (Section 4.3.2).
Mini-PLC-2/15 Processor Replacement
If the Processor is the suspected source of a fault, perform the following steps to
replace it:
CAUTION: when removing the Mini–PLC–2/15 Processor from the
I/O Chassis, always remove system power and I/O power first. This
will avoid damage to the Processor Module’s circuitry.
1. Turn the Mode Select Switch to the PROG position.
2. Verify that a copy of the User Program is stored on an EPROM or
magnetic tape.
3. Remove AC power and I/O power.