Rockwell Automation 1772-LS_LSP,D17726.8.6 PROG/OPER MANUAL-MINI PLC-2/05 User Manual
Page 58
Relay-type Instructions
Chapter 6
6Ć6
These instructions control a specific bit based on the rung condition. When its
rung conditions are:
True - Output Latch sets a specified bit.
True - Output Unlatch resets a specified bit.
False - No action is taken.
Keystrokes: You enter an Output Latch or Unlatch instruction by performing
the following steps.
1.
Press either -(L)- or -(U)- as required.
2.
Enter
.Important: You can initially condition the latch or unlatch instruction to on or
off by pressing 1 or 0, respectively.
Editing in a Completed Rung
You edit an Output Latch or Unlatch instruction by performing the
following steps.
1.
Position the cursor over the Output Latch or Unlatch instruction you want
to change.
2.
Press either -(L)- or -(U)- or any other output instruction type as required.
3.
Enter
.Important: If power is lost, all latch bits remain in their last state. When power
is restored, all outputs connected to latch bits are energized immediately.
Branching Instructions
Use branching instructions when you want several parallel sets of conditions to
make an output action possible. A program with branching says, “If this set of
conditions is true, or if that set of conditions is true, perform the following
action.” Branching allows two or more paths to reach the same
output destination.
True
C2
C1
A
False