Omron CS1G/H-CPUxx-EV1 Programming Manual page 214

Interrupt Tasks
External Interrupts (CS
Series Only)
List of Interrupt Tasks
Type Task Execution condition
No.
I/O Inter- 100 to Input from the Interrupt
rupts 131 Input Unit ON on the
00 to 31 CPU Rack (See note 1.)
Scheduled 2 and 3 Scheduled (fixed inter-
Interrupts vals)
0 and 1
Power OFF 1 When power turns OFF
Interrupt (After the default power
OFF detection time +
power OFF detection
delay time)
External 0 to When requested by an
Interrupts 255 Special I/O Unit or CPU
0 to 255 Bus Unit on the CPU
Rack or by an Inner
Board (CS Series only)
(See note 2.)
Note
178
Note The execution time for the power OFF task must be less than 10 ms – (Power
OFF delay detection time).
An external interrupt task will be executed when an interrupt is requested by
an Special I/O Unit, CPU Bus Unit, or Inner Board (CS Series only). The Spe-
cial I/O Unit or CJ Bus Unit, however, must be on the CPU Rack to request
execution of an external interrupt task.
Setting procedure
Use the MSKS (SET INTER-
RUPT MASK) instruction to
assign inputs from Interrupt
Input Units on the CPU Rack.
Use the MSKS (SET INTER-
RUPT MASK) instruction to
set the interrupt interval. See
Scheduled Interrupt Time
Units in PLC Setup.
See Power OFF Interrupt
Task and Power OFF Detec-
tion Delay Time in PLC
Setup.
None (always valid)
1. The Interrupt Input Unit must be mounted to the CPU Rack. For CJ1-H
CPU Units, the Unit must be connected as one of the five Units next to the
CPU Unit (slots 0 to 4). For CJ1M CPU Units, the Unit must be connected
as one of the three Units next to the CPU Unit (slots 0 to 2). I/O Interrupt
Units mounted elsewhere cannot be used to request execution of I/O inter-
rupt tasks
2. The Special I/O Unit or CPU Bus Unit must be mounted to the CPU Rack.
For CJ1-H CPU Units, the Unit must be connected as one of the five Units
CPU Unit
Interrupt
Pro-
Power OFF
gram
Special I/O Unit,
CS1 CPU Bus Unit
or Inner Board
CPU Unit
Pro-
gram
Number of
interrupts
32 points
2 points
1 point
256 points
Section 4-3
Application examples
Increasing response
speed to specific inputs
Monitoring operating sta-
tus at fixed intervals
Executing emergency
processing when power
shuts OFF.
Performing processing
required by Special I/O
Units, CPU Bus Units,
and the Inner Board.