Allen-Bradley MicroLogix 1200 Reference Manual

Publication 1762-RM001C-EN-P
Using Interrupts 18-9
UID - User Interrupt
Disable
Instruction Type: output
The UID instruction is used to disable selected user interrupts. The table
below shows the types of interrupts with their corresponding disable bits:
To disable interrupt(s):
1. Select which interrupts you want to disable.
2. Find the Decimal Value for the interrupt(s) you selected.
3. Add the Decimal Values if you selected more than one type of
interrupt.
4. Enter the sum into the UID instruction.
For example, to disable EII Event 1 and EII Event 3:
EII Event 1 = 32, EII Event 3 = 4
32 + 4 = 36 (enter this value)
UID
User Interrupt Disable
Interrupt Types 5
UID
Table 18.4 Execution Time for the UID Instruction
Controller When Rung Is:
True False
MicroLogix 1200 0.8
µ
s0.0
µ
s
MicroLogix 1500 0.8
µ
s0.0
µ
s
Table 18.5 Types of Interrupts Disabled by the UID Instruction
Interrupt Element Decimal
Value
Corresponding
Bit
EII - Event Input Interrupts Event 0 64 bit 6
EII - Event Input Interrupts Event 1 32 bit 5
HSC - High-Speed Counter HSC0 16 bit 4
EII - Event Input Interrupts Event 2 8 bit 3
EII - Event Input Interrupts Event 3 4 bit 2
HSC - High-Speed Counter
(1)
(1) The MicroLogix 1200 has one HSC Interrupt, HSC0. The MicroLogix 1500 has two, HSC0 and HSC1.
HSC1 2 bit 1
STI - Selectable Timed Interrupts STI 1 bit 0
Note: Bits 7 to 15 must be set to zero.

Allen-Bradley MicroLogix 1200 Specifications

General

Brand	Allen-Bradley
Model	MicroLogix 1200
Category	Control Unit
Language	English