Omron CJ1M-CPU Series Replacement Manual page 21

(2) Functional differences for Interrupt inputs
The following operation differences exist between CJ1M / CJ2M in the interrupt input function. If used,
check that the operation is not affected.
Interrupt Inputs
Update method for
interrupt counter SV
(Counter Mode)
Update method for
interrupt counter PV
(Counter Mode)
Updating timing for
interrupt counter PV
(Counter Mode)
Operation of interrupt
counter when interrupts
are disabled with DI
instruction
CJ1M
Updating interrupt
counter SV in Auxiliary
Area
･ Updating
with INI
instruction
･
Updating interrupt
counter PV in Auxiliary
Area
･Once per count
･When PRV instruction is
executed
Counter operation not
countinued
CJ2M
Updating interrupt
counter SV in Auxiliary
Area and then executing
MSKS again to enable
interrupts
Updating with INI
instruction
･Every cycle
･When count completion
interrupt occurs
･When PRV instruction is
executed
Counter operation
continued, but interrupt
will not occur at count
completion
Description
Add MSKS instruction, if
you use this operation.
Change to INI instruction,
if you use Auxiliary for
updating.
Make sure that it does
not affect operation.
If it is affected, it is
necessary to change the
program etc.
Make sure that it does
not affect operation.
If it is affected, it is
necessary to change the
program etc.
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