Rockwell Automation 1761-HHP-B30 MicroLogix 1000 with Hand-Held Programmer (HHP) - Manual (Page 357)

After You’ve Entered Your Program
Chapter 18
18–36
Guide to Forcing External Input Data File Bits
The following occurs in the Run or Test mode:
•
Forcing of input data file bits and resultant data changes appear in the
data file displays.
•
The ladder program is scanned and ladder logic is applied.
•
Instruction state boxes are filled for true bit instructions.
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, RCSN, or RSSN, the bit is forced
Off and the data file bit remains forced until the force is
removed.
FON
C
- If the controller is in RRUN, RCSN, or RSSN, the bit is forced
On and the data file bit remains forced until the force is
removed.
FON
C
-
FUN
FOF
R
-
FUN
or
Affects the cursored external input address. It removes the
set force from the data file, if applicable. 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 or Test
mode.
R 0 0 0
I / 6 0
R 0 0 0
I / 6 1
R 0 0 0 F O N
I / 6 1
R 0 0 0 F O F
I / 6 0
Initial conditions.
Bit is Off.
No forces exist.
Bit is Off.
Force is Off.
Bit is On.
No forces exist.
Bit is On.
Force is On.