Introduction
15
Doc No: UMAN\FL\0110
Rev. No.: 1.02B
RUN Position
Read
RUN/STOP
Switch
Turn On RUN Led
Clear non retentive PLC registers.
Execute Power-On Tasks.
Execute Power-Up ladder.
Enable User Timer Interrupt.
Initialize digital filter constant to
default 10 mSec.
Reset Power On system bit to ‘0’
HALT MODE
STOP Position
Self Diagnosis
ERROR MODE
Error Down
OK
Mode
check
RUN Mode or Switch position
change from Stop to RUN
Halt Mode
HALT MODE
Start counting Main Loop
Scan Time
Update PLC mode from software
Main Loop Start
HOLD
If power On System
bit is ‘1’
Hold Mode
Yes
No
B
Scan Local and
expansion inputs
C
D