Omron SYSMAC C Series User Manual page 86

Instruction words
This instruction can be used to perform test runs of each completed
circuit. To do this, place the END instruction at the end of each circuit in
the series. After testing the circuit, delete the END instruction and test the
next circuit in a similar manner.
Coding chart
INTERLOCK (IL) and
l A A
Symbol Function
Branches circuit to OUT instructions
Ladder diagram Remarks
more than one OUT instruction. If the IL and ILC instructions are not used
0004 in pairs, an error results during program check.
All relay coils between these two instructions are set or reset depending
on the current status of the relays.
When the interlock flip-flop (ILF) in the CPU is 0, the contents of the result
register are fixed to 0. Consequently, as long as the ILF is set to 1, the
It output relay remains OFF
instruction
ILF
ILC if
instruction
R
Coding chart
ILC (03)