Interrupt Pointer(I) - Mitsubishi Electric melsec q00ujcpu User Manual

9.11 Interrupt Pointer(I)

(1) Definition
The interrupt pointer (I) is used as a label at the beginning of an interrupt program, and can be used in all
programs that are being executed.
(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.
Interrupt factor
Interrupt by an interrupt module
Interrupt by the internal timer
Multiple CPU synchronous interrupt
Intelligent function module interrupt
*1: For available interrupt modules, refer to the following.
QCPU Userís 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 (
setting) is required in the "PLC system" tab of the PLC parameter dialog box.
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Interrupt pointer (interrupt program label)
I
Figure 9.90 Interrupt pointer
Table9.10 Classification of interrupt factors
Interrupt pointer No.
*1
I0 to I15
I28 to I31
*2
I45
I50 to I255
Interrupt program
IRET
Description
Interrupt input from an interrupt module
Fixed scan interrupt by the internal timer of the CPU module
Fixed scan interrupt to execute synchronized control with the
operation cycle of a motion controller
Interrupt from an intelligent function module
Section 6.22), the intelligent function module setting (interrupt pointer
*3