Rockwell Automation 1772-LV Mini-PLC - 2/15 Programmable Controller (Series B) Programming and Operations - Manual (Page 122)

Programming Applications
Chapter 9
9Ć5
Figure 9.3
Program Control Instructions
110
17
MCR
Rung 1
110
16
Rung 2
011
15
MCR
Rung 3
110
17
ZCL
Rung 1
110
16
Rung 2
011
15
ZCL
Rung 3
Master Control Reset
Using the MCR instruction, rung logic would denote:
If address 11017 is true, then address 01115 will work normally.
If address 11017 is false, then address 01115 will be reset.
Using the ZCL instruction, rung logic would denote:
If address 1117 is true, then address 01115 will work normally.
If address 11017 is false, then address 01115 will be held in its last state.