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Rockwell Automation Publication 2080-UM002N-EN-E - November 2022
Appendix C User Interrupts
EII Function Status Information
EII Function status bits can be monitored either in the User Program, or in the Connected
Components Workbench software, in Debug mode.
EII User Interrupt Executing (EII0.EX)
The EX (User Interrupt Executing) bit is set whenever the EII mechanism detects a valid input
and the controller is scanning the EII POU. The EII mechanism clears the EX bit when the
controller completes its processing of the EII subroutine.
The EII EX bit can be used in the control program as conditional logic to detect if an EII
interrupt is executing.
EII User Interrupt Enable (EII0.Enabled)
The Enabled (User Interrupt Enable) bit is used to indicate the EII enable or disable status.
EII User Interrupt Lost (EII0.LS)
LS (User Interrupt Lost) is a status flag that represents an interrupt has been lost. The
controller can process 1 active and maintain up to 1 pending user interrupt conditions before it
sets the lost bit.
This bit is set by the controller. It is up to the control program to utilize or track, the lost
condition if necessary.
EII User Interrupt Pending (EII0.PE)
PE (User Interrupt Pending) is a status flag that represents an interrupt is pending. This status
bit can be monitored, or used for logic purposes, in the control program if you need to
determine when a subroutine cannot execute immediately.
This bit is automatically set and cleared by the controller. The controller can process 1 active
and maintain up to 1 pending user interrupt conditions before it sets the lost bit.
Sub-Element Description
Data Format
User Program Access
EX - User Interrupt Executing
binary (bit)
read only
Sub-Element Description
Data Format
User Program Access
Enabled - User Interrupt Enable
binary (bit)
read only
Sub-Element Description
Data Format
User Program Access
LS - User Interrupt Lost
binary (bit)
read/write
Sub-Element Description
Data Format
User Program Access
PE - User Interrupt Pending
binary (bit)
read only