Allen-Bradley MicroLogix 1200 Reference Manual page 217

IIM - Immediate Input
with Mask
IIM IIM
Immediate Input w/Mask
Slot I:0.0
Mask N7:0
Length 1
1
Input and Output Instructions
The input and output instructions allow you to selectively update data
without waiting for the input and output scans.
Instruction
IIM - Immediate Input with Mask Update data prior to the normal input scan.
IOM - Immediate Output with
Mask
REF - I/O Refresh
Instruction Type: output
This instruction is used for embedded I/O only. It is not
NOTE
designed to be used with expansion I/O.
Table 17.1 Execution Time for the IIM Instruction
Controller
MicroLogix 1200
MicroLogix 1500
Used To:
Update outputs prior to the normal output scan.
Interrupt the program scan to execute the
I/O scan (write outputs, service
communications, read inputs)
When Rung Is:
True False
26.4 µ s 0.0 µ s
22.5 µ s 0.0 µ s
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Chapter
Page
17-1
17-3
17-4
Publication 1762-RM001C-EN-P