Interrupt Function - Mitsubishi Electric MELSEC iQ-R Series User Manual

1.11

Interrupt Function

This function executes an interrupt program of the CPU module when an interrupt factor such as alert output or disconnection
is detected.
For a temperature input module, the maximum number of interrupt pointers available is 16 per module.
Operation
■Detecting an interrupt factor
When an interrupt factor occurs, an interrupt request is sent to the CPU module at the same time as 'Interrupt factor detection
flag [n]' (Un\G4 to Un\G19) turns to Interrupt factor (1).
■How to reset an interrupt factor
When Reset request (1) is set to 'Interrupt factor reset request [n]' (Un\G156 to Un\G171) corresponding to the interrupt factor,
the specified interrupt factor is reset and 'Interrupt factor detection flag [n]' (Un\G4 to Un\G19) changes to No interrupt factor
(0).
Setting procedure
To use the interrupt function, set "Condition target setting", "Condition target channel setting", "Interrupt factor transaction
setting", and "Interrupt pointer" in the engineering tool. After completing the settings, write the project to enable the settings.
[Navigation window]  [Parameter]  [Module Information]  Module model name  [Interrupt setting]
Item
Condition target setting
Condition target channel setting
Interrupt factor transaction setting
Interrupt pointer
■Condition target setting
Select a factor of the condition target setting for the interrupt detection.
Setting value
Disable
Error flag
Warning output flag (Process alarm)
Warning output flag (Rate alarm)
Disconnection detection flag
Conversion completed flag
Logging hold flag
Logging read
*1 For the thermocouple input module, power-on with the cold junction compensation resistor disconnected results in an interrupt being
detected since conversion of every channel is complete.
■Condition target channel setting
Select a target channel when the condition target setting for the interrupt detection is channel specification.
■Interrupt factor transaction setting
Set an interrupt request for when the same interrupt factor occurs during the interrupt factor detection.
• With "Interrupt reissue requests", if the same interrupt factor occurs during the interrupt factor detection, an interrupt
request is sent to the CPU module again.
• With "No interrupt reissue request", if the same interrupt factor occurs during the interrupt factor detection, an interrupt
request is not sent to the CPU module.
Description
The interrupt detection is not executed.
The rise (OFF to ON) of 'Error flag' (XF) is detected.
The rise (OFF to ON) of Alert output flag (Process alarm) is detected. (The channel must be specified.)
The rise (OFF to ON) of Alert output flag (Rate alarm) is detected. (The channel must be specified.)
The rise (OFF to ON) of Disconnection detection flag is detected. (The channel must be specified.)
The ON state of Conversion completed flag is detected. (The channel must be specified.)
The rise (OFF to ON) of Logging hold flag is detected. (The channel must be specified.)
The logging completion of data amount equivalent to logging read points is detected. (The channel must be specified.)
Description
Select a factor of the target for the interrupt detection.
Select a target channel when the condition target setting for the interrupt
detection is channel specification.
Set an interrupt request for when the same interrupt factor occurs during the
interrupt factor detection.
Specify the number of an interrupt pointer that is initiated at the detection of an
interrupt factor.
*1
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1.11 Interrupt Function
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