Allen-Bradley MicroLogix 1100 Instruction Set Reference Manual

Publication 1763-RM001C-EN-P - October 2009
Using Interrupts 277
EII Error Detected (ED)
The ED (Error Detected) flag is a status bit that can be used by the control
program to detect if an error is present in the EII sub-system. The most
common type of error that this bit represents is a configuration error.
When this bit is set, look at the specific error code in parameter EII:0.ER
This bit is automatically set and cleared by the controller.
EII Edge Select (ES)
The ES (Edge Select) bit selects the type of trigger that causes an Event
Interrupt. This bit allows the EII to be configured for rising edge
(off-to-on, 0-to-1) or falling edge (on-to-off, 1-to-0) signal detection. This
selection is based on the type of field device that is connected to the
controller.
The default condition is 1, which configures the EII for rising edge
operation.
EII Input Select (IS)
The IS (Input Select) parameter is used to configure each EII to a specific
input on the controller. Valid inputs are 0 to 7, which correspond to
I1:0.0/0 to I1:0.0/7.
This parameter is configured with the programming device and cannot be
changed from the control program.
Sub-Element Description Address Data Format Type User Program
Access
ED - Error Detected EII:0/ED binary (bit) status read only
Sub-Element Description Address Data Format Type User Program
Access
ES - Edge Select EII:0/ES binary (bit) control read only
Sub-Element Description Address Data Format Type User Program
Access
IS - Input Select EII:0.IS word (INT) control read only
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Allen-Bradley MicroLogix 1100 Specifications

General

Brand	Allen-Bradley
Model	MicroLogix 1100
Category	Controller
Language	English