Omron CJ - REFERENCE MANUAL 02-2010 Reference Manual page 225

Operation of Differentiated Instructions in an MILR(518) Interlock
If there is a differentiated instruction (DIFU, DIFD, or instruction with a @ or % prefix) between
MILR(518) and the corresponding MILC(519), that instruction will not be executed after the interlock is
cleared even if the differentiation condition of the instruction was established.
In the same way, a differentiated instruction will not be executed if its execution condition is established
at the same time that the interlock is started or cleared.
Example
When a DIFFERENTIATE UP (DIFU(013)) instruction is being used and the input condition is OFF
when the interlock starts and ON when the interlock is cleared, DIFU(013) will not be executed when
the interlock is cleared.
0.00
MILR
0
1. When CIO 0.00 is OFF (interlock starts), the DIFU's CIO 0.01 input condition is OFF.
2. The DIFU's CIO 0.01 input condition goes from OFF to ON while CIO 0.00 is OFF (DIFU interlocked),
3. When CIO 0.00 goes from OFF to ON (interlock cleared), DIFU is not executed even though CIO 0.01 is still ON.
0.01
DIFU
10.00
MILC
0
Controlling Interlock Status from a Programming Device
An interlock can be engaged or released manually by force-resetting or force-setting the Interlock
Status Bit (specified with operand D of MILH(517) and MILR(518)) from a Programming Device. The
forced status of the Interlock Status Bit has priority and overrides the interlock status calculated by
program execution.
Force-set: Releases the interlock.
OFF
MILH
n
100.00
CIO 100.00 is OFF when the interlock is engaged.
Program section
If CIO 100.00 is force-set (ON), the interlock is released.
controlled by interlock
MILC
n
CS/CJ/NSJ Series Instructions Reference Manual (W474)
Timing chart
Not interlocked Interlocked
ON
0.00
OFF
ON
ON
0.01
OFF
OFF
MILR(518) interlock
ON
10.00
OFF
Force-reset: Engages the interlock.
ON
MILH
n
100.00
CIO 100.00 is ON when the interlock is not engaged.
Program section
If CIO 100.00 is force-reset (OFF), the interlock is engaged.
controlled by interlock
MILC
n
3. Instructions
Not interlocked
DIFU(013) is not executed.
3
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