Interrupt parameters

The supported interrupt parameters vary with the interrupt type.
Interrupt parameters
Interrupt Parameter
Description
Auto start
Determines whether a user interrupt function configuration is forced without using any ladder logic.
It is turned off by default. When turned on, the interrupt is forced without any ladder logic.
The interrupt parameter is available for the following interrupt types:
  • Event input interrupt (EII)
  • Selectable timed interrupt (STI)
  • Universal plug-in module (UPM) interrupt
  • High-speed counter (HSC) user interrupt
Embedded input
Lists the index number of the embedded inputs that are associated with a user interrupt function. Embedded input values for different controller types:
  • Fourteen embedded variables are available for 24-point controllers: from IO_EM_DI_00 through IO_EM_DI_13
  • Sixteen embedded variables are available for 48-point controllers: from IO_EM_DI_00 through IO_EM_DI_15
The interrupt parameter is available for EIIs.
Set point (STI)
Specifies the period between executions of the STI ladder subroutine.
If your program contains a large number of rungs for the STI Program Organization Unit and the STI value is small, the interrupts might consume a significant portion, if not all, of your CPU resources. The following problem might occur:
  • Program Scan exceeded the watchdog timeout value (0xD011).
  • The value is from 0 through 65535. The default value is 0.
  • The interrupt parameter is available for STIs.
Overflow mask (HSCO.MV)
Allows or prohibits an overflow interrupt from occurring. If the bit is clear (0), and an Overflow Reached condition is detected by the high-speed counter (HSC), the HSC user interrupt will not be executed.
The Overflow Mask (MV) bit is controlled by the user program and retains its value through a restart. The user program must set and clear the MV bit.
HSC modes: 0...9
The interrupt parameter is available for HSC user interrupts.
Underflow mask (HSCO.MN)
Allows or prohibits am underflow interrupt from occurring. If the bit is clear (0), and an Underflow Reached condition is detected by the HSC, the HSC user interrupt will not be executed.
The Underflow Mask (MN) bit is controlled by the user program and retains its value through a restart. The user program must set and clear the MN bit.
HSC modes: 2...9
The interrupt parameter is available for HSC user interrupts.
High preset mask (HSCO.MH)
Allows or prohibits a high preset interrupt from occurring. If the bit is clear (0), and a High Preset Reached condition is detected by the HSC, the HSC user interrupt will not be executed.
The High Preset Mask (MH) bit is controlled by the user program and retains its value through a restart. The user program must set and clear the MH bit.
HSC modes: 0...9
The interrupt parameter is available for HSC user interrupts.
Low preset mask (HSCO.ML)
Allows or prohibits a low preset interrupt from occurring. If the bit is clear (0), and a Low Preset Reached condition is detected by the HSC, the HSC user interrupt will not be executed.
The Low Preset Mask (ML) bit is controlled by the user program and retains its value through a restart. The user program must set and clear the ML bit.
HSC modes: 2...9
The interrupt parameter is available for HSC user interrupts.
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