6
FUNCTIONS
6.22 High Speed Interrupt Function
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(1) Compatible CPUs
(2) Specifications of high speed interrupt function
To set the high speed interrupt function, choose "PLC system" - "System interrupt
settings" - "High speed interrupt setting" on the PLC parameter screen.
(3) Detailed items of high speed interrupt function
POINT
Since the high speed interrupt function need to pick up interrupts at very short
intervals of 0.2ms to 1.0ms with the interrupt pointer I49, please do not run the
interrupt programs, which use the other interrupt pointers and fixed scan
execution type programs.
If any of the interrupt and fixed scan execution type programs is executed,
interrupt cannot be made at the cycle intervals set for the high speed interrupt
function.
Refer to Section 6.22.4 for other restrictions.
Table6.43 CPU modules compatible with high speed interrupt function
Compatible CPU
modules
Remarks
Q02HCPU, Q06HCPU,
Q12HCPU, Q25HCPU
There are restrictions on CPU module versions (Appendix 4.2(2))
Table6.44 Specifications of high speed interrupt function
Item
Description
Remarks
Interrupt cycle interval
0.2 to 1.0ms
0.1ms units
Number of interrupt
programs
1
Interrupt pointer I49
Table6.45 Detailed items of high speed interrupt function
Item
Description
Remarks
Interrupt program
execution
Runs the interrupt program created with I49.
High speed I/O refresh
Updates I/O signals between the I/O, intelligent
function modules and CPU module at interrupt
cycle intervals.
High speed buffer transfer
Updates data between the intelligent function
module buffer memories and CPU module
devices at interrupt cycle intervals.
