Omron CJ2 CPU UNIT User Manual page 66

1 Overview
Function
Interrupt Scheduled Interrupts
Resetting and restarting with
*7
MSKS(690)
Reading present value of internal timer
with MSKS(690)
Power OFF Interrupts
I/O Interrupts
External Interrupts
Input Interrupt Function
Input Interrupts
High-speed Counter Interrupts
High-speed Interrupt Function
Clock Clock Function
Operation Start Time Storage
Operation Stop Time Storage
Startup Time Storage
Power Interruption Time Storage
Total Power ON Time Calculation
Power ON Clock Data Storage
User Program Overwritten Time Storage
Parameter Date Storage
*7 Supported only by the CJ2M CPU Units.
*8 Pulse I/O Modules are supported only by CJ2M CPU Units with unit version 2.0 or later.
*9 Supported only by CJ2H CPU Units with unit version 1.1 or later.
1-24
A task is executed at a specified interval.
When MSKS(690) is executed, the internal timer is restarted and the time to
first interrupt is set to a fixed value.
MSKS(690) can be used to read the time that has elapsed until the scheduled
*7 interrupt is started or since the previous scheduled interrupt.
A task can be executed when CPU Unit's power turns OFF.
A task can be executed when an input signal is input to an Interrupt Input Unit.
A task can be executed when interrupts are requested from a Special I/O Unit
or a CPU Bus Unit.
*8 A task is started for an interrupt input from a Pulse I/O Module or for a high-
speed counter input.
Interrupt tasks are executed when the interrupt input turns ON or turns OFF.
Direct Mode: An interrupt task is executed each time an input signal changes.
Counter Mode: Changes in the input signal are counted up or down and the
interrupt task is executed when the counter counts out. (The maximum
response frequency is 3 kHz.)
An interrupt task is executed when preset comparison conditions for a high-
speed counter are met.
Target-value comparison: The interrupt task is executed when the count
matches a specified value.
Range comparison: The interrupt task is executed when the count enters or
leaves a specified range of values.
*9 Improves performance for executing interrupt tasks with certain restrictions.
Clock data is stored in memory.
Accuracy (Accuracy depends on the temperature.)
Ambient temperature of 55°C: −3.5 to +0.5 min error per month
Ambient temperature of 25°C: −1.5 to +1.5 min error per month
Ambient temperature of 0°C: −3 to +1 min error per month
The time when operating mode was last changed to RUN mode or MONITOR
mode is stored.
The last time a fatal error occurred or the last time the operating mode was
changed to PROGRAM mode is stored.
The time when the power was turned ON is stored.
The time when the power is turned OFF is stored.
The total time that the PLC has been ON is stored in increments of 10 hours.
A history of the times when the power was turned ON is stored.
The time that the user program was last overwritten is stored.
The time when the Parameter Area was overwritten is stored.
Description
CJ2 CPU Unit Hardware User's Manual