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9.11 Interrupt Pointer(I)
(1) Definition
The interrupt pointer (I) is used as a label at the start of an interrupt program, and can be used in any programs.
(2) Number of available points
The number of points available for the interrupt pointer is 256 (I0 to I255).
(3) Interrupt factors
Interrupt factors are listed in Table9.10.
*1: For available interrupt modules, refer to the following.
QCPU User's Manual (Hardware Design, Maintenance and Inspection)
*2: Applicable when using the Universal model QCPU and motion controller that support the multiple CPU high speed transmission.
*3: This module can be a serial communication module, MELSECNET/H module, Ethernet module, or high-speed counter module.
For details, refer to the manual for each module.
To use the intelligent function module interrupt ( Section 6.22), the intelligent function module setting (interrupt pointer
setting) is required in the "PLC system" tab of the PLC parameter dialog box.
Figure 9.91 Interrupt pointer
Table9.10 Classification of interrupt factors
Interrupt factor Interrupt pointer No. Description
Interrupt by an interrupt module
*1
I0 to I15 Interrupt input from an interrupt module
Interrupt by the internal timer I28 to I31 Fixed scan interrupt by the internal timer of the CPU module
Multiple CPU synchronous interrupt
*2
I45
Fixed scan interrupt to execute synchronized control with the
operation cycle of a motion controller
Intelligent function module interrupt I50 to I255
Interrupt from an intelligent function module
*3
Interrupt pointer (interrupt program label)
Interrupt program
IRET
I