Rockwell Automation 1772-LP3 PLC - 2/30 Programmable Controller Programming and Operations Manual - Manual (Page 18)

Hardware Considerations
Chapter 2
2Ć2
Figure 2.1
PLCĆ2/30 Processor
Diagnostic
Indicators
Keylock Mode
Select Switch
When the memory write protect jumper (Figure 2.2) is removed from a
1772-LH processor interface module, data table values can be changed
between word addresses 010
8
and 377
8
. These values can be changed only
when the processor is in the program mode or in the run/program mode
using on-line data change.
2.2
Memory Write Protect