Specifications

Using programmable controllers Checking operation
2 - 26
● Executing the program
 Tilt the "RESET/STOP/RUN" switch on the front of the CPU module towards "RUN".
 If the "RUN" LED turns on green, the program is running normally.
2.8.2 Using switches and lamps to check the operation
Check the program operation by turning the switches and lamps ON/OFF.
If all of the switches (X6, X7, and X8) are off right after the execution of the program, the output lamp
Y0 stays off and the output lamp Y6 and the output lamp Y7 stay on due to the instructions from the
created program.
● Operation check step 1
Turn on the switch X6.
The output lamp Y0 stays off and the output lamps Y6 and Y7 stay on.
● Operation check step 2
Turn on the switch X7.
The output lamp Y0 turns on.
● Operation check step 3
Turn on the switch X8.
The output lamps Y6 and Y7 turn off.
LS90012
Fig. 2-49: Executing the program
NOTE Do not use pointed tools such as a screwdriver when operating the switch.
They may damage the switch.
NOTE The described results of each step of the operation check are only valid, if the switch status of the
step before is kept at the current step.


LED display during the STOP status
LED display during the RUN status
MODE: Green (ON)
RUN: OFF
MODE: Green (ON)
RUN: Green (ON)