Rockwell Automation 1761-HHP-B30 MicroLogix 1000 with Hand-Held Programmer (HHP) - Manual (Page 359)

After You’ve Entered Your Program
Chapter 18
18–38
Guide to Forcing External Output Circuits
The following occurs in the Run mode:
•
The program is scanned and control logic is applied.
•
Instruction state boxes are filled for true bit instructions.
•
Controller output LEDs go on and are maintained for all forced external
output circuits.
The table below shows the keys and key sequences involved with setting and
clearing forces. A confirmation screen appears following each of these.
Key or Key Sequence Operation
FOF
R
- If the controller is in RRUN, the bit is forced Off and the
output circuit remains forced until the force is removed. The
data file bit is unaffected.
FON
C
- If the controller is in RRUN, the bit is forced On and the
output circuit remains forced until the force is removed. The
data file bit is unaffected.
FON
C
-
FUN
FOF
R
-
FUN
or
Affects the cursored external output circuit. It removes the
set force. Other forces are unaffected.
5
MENU
I
ENT
Affects all forced external input bit addresses and external
output circuits. It removes set forces from all external input
bit addresses and output circuits.
The displays below show an example of setting a force while in Run mode.
R 0 0 1
O / 1 0
R 0 0 1
O / 1 1
R 0 0 1 F O N
O / 1 0
R 0 0 1 F O F
O / 1 0
Initial conditions.
Bit is Off.
No forces exist.
Bit is Off.
Force is Off.
Bit is On.
No forces exist.
Bit is Off. (Set forces do not
affect ouput data file bits.)
Force is On.