Automationdirect.com DirectLOGIC DL205 Series User Manual page 405

Chapter 5: Standard RLL Instructions - Interrupt
Interrupt Return (IRT)
1
When an Interrupt Return is executed in the interrupt routine, the
230
CPU will return to the point in the main body of the program from
240
which it was called. The Interrupt Return is programmed as the last
2
instruction in an interrupt routine and is a stand alone instruction
250-1
(no input contact on the rung).
260
3
Interrupt Return Conditional (IRTC)
The Interrupt Return Conditional instruction is a optional
4
230
instruction used with an input contact to implement a condtional
240
return from the interrupt routine. The Interrupt Return is required to
5
terminate the interrupt routine.
250-1
260
Enable Interrupts (ENI)
6
The Enable Interrupt instruction is programmed in the main body of
230
the application program (before the End instruction) to enable
240
hardware or software interrupts. Once the coil has been energized,
7
interrupts will be enabled until they are disabled by the Disable
250-1
Interrupt instruction.
260
8
Disable Interrupts (DISI)
The Disable Interrupt instruction is programmed in the main body of
9
230
the application program (before the End instruction) to disable both
240
hardware or software interrupts. Once the coil has been energized,
10
interrupts will be disabled until they are enabled by the Enable
250-1
Interrupt instruction.
260
11
12
13
14
A
B
C
D
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DL205 User Manual, 4th Edition, Rev. B
IRT
IRTC
ENI
DISI
DS Used
HPP Used