Publication 1762-RM001C-EN-P
18-18 Using Interrupts
EII Function File Sub-Elements
EII Program File Number (PFN)
PFN (Program File Number) defines which subroutine is called (executed)
when the input terminal assigned to EII:0 detects a signal. A valid
subroutine file is any program file (3 to 255).
The subroutine file identified in the PFN variable is not a special file
within the controller. It is programmed and operated the same as any
other program file. From the control program perspective it is unique, in
that it is automatically scanned based on the configuration of the EII.
EII Error Code (ER)
Any ER (Error Code) detected by the EII sub-system is displayed in this
register. The table below explains the error codes.
EII User Interrupt Executing (UIX)
The UIX (User Interrupt Executing) bit is set whenever the EII mechanism
detects a valid input and the controller is scanning the PFN. The EII
mechanism clears the UIX bit when the controller completes its
processing of the EII subroutine.
The EII UIX bit can be used in the control program as conditional logic to
detect if an EII interrupt is executing.
Sub-Element Description Address Data Format Type User Program
Access
PFN - Program File Number EII:0.PFN word (INT) control read only
Sub-Element Description Address Data Format Type User Program
Access
ER - Error Code EII:0.ER word (INT) status read only
Table 18.13 EII Error Codes
Error
Code
Recoverable Fault
(Controller)
Description
1 Invalid Program File
Number
Program file number is less than 3, greater than 255, or does not
exist
2 Invalid Input
Selection
Valid numbers must be 0, 1, 2, 3, 4, 5, 6, or 7.
3 Input Selection
Overlap
EIIs cannot share inputs. Each EII must have a unique input.
Sub-Element Description Address Data Format Type User Program
Access
UIX - User Interrupt Executing EII:0/UIX binary (bit) status read only
To Next Page
Loading...
Need help?
General
