Parameter Name - Mitsubishi Electric MELSEC iQ-R Series User Manual

Precautions
■When "Detection Method" is set to "Level" and the interrupt condition is always met
If the sequence scan takes much longer than the link scan, since interrupt processing is activated in each link scan, sequence
scan time may greatly increase, resulting in a watchdog timer error of the CPU module.
When "Detection Method" is set to "Level" and the interrupt condition is always met, do not use interrupt settings and correct
the interrupt condition in the program.
■Before executing an interrupt program
Execute the EI instruction in a main routine program and enable an interrupt. ( MELSEC iQ-R CPU Module User's Manual
(Application))
■When multiple interrupts have simultaneously occurred
The operation may delay.
■Mode of a master/local module
The interrupt to the CPU module can be performed when the master/local module is in online mode. The interrupt cannot be
performed when the master/local module is in hardware test or offline mode.
■Starting an interrupt program by the rising/falling edge of the specified device
Do not start an interrupt program using instructions, such as PLS and PLF, that depend on the rising/falling edge of the
specified devices because changes in devices might not be read.
Ex.
A request for the interrupt is issued by turning on RX10.
U0\
Since change of RX10 may not be read,
PLS G225.0
this cannot be specified as interrupt condition.
■An interrupt cannot be generated
Changes in the interrupt condition device cannot be detected if the change is shorter than the transmission delay time.
■Using cyclic data in an interrupt program
When an interrupt program is executed, RX, RY, RWr, and RWw are not link refreshed to CPU module devices. Therefore,
directly access to the buffer memory of a master/local module by using Module access device (Un\G).
■At data link error
When data link is faulty, a request for the interrupt to a CPU module is not issued.

Parameter Name

Item
Parameter Name
Description
Set a name for the module parameter if desired.
Setting range
Up to 8 one-byte or two-byte
characters
(Default: Blank)
2 PARAMETER SETTINGS
2.4 Application Settings
2
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