Rockwell Automation 1747-PT1, D1747NP002 Hand-Held Terminal - Manual (Page 262)

Instructions
Chapter 18
I/O Message and Communication
18–16
MASK: Specify a Hex constant or register address. Refer to appendix B for
information regarding masks and hexadecimal numbering.
Immediate Output with Mask IOM Output Instruction
(IOM)
IOM
IMMEDIATE OUT w MASK
Slot
O:3.0
Mask FF00
F1 F2 F3 F4 F5
ZOOM on IOM –(IOM)– 2.0.0.0.1
NAME: IMMEDIATE OUTPUT w/ MASK
SLOT: O0:3.0 0000 0000 0000 0000
MASK: FF00 FF00
EDT_DAT
HHT Ladder Display:
HHT Zoom Display:
Ladder Diagrams and APS Displays:
(online monitor mode)
This instruction updates outputs before the normal output scan. When the
IOM instruction is enabled, the program scan is interrupted to transfer data to
a specified I/O slot through a mask. The program scan then resumes with the
instruction following the IOM instruction.
This instruction operates on the physical outputs assigned to a particular
word of a slot (16 bits maximum). For the mask, a 1 in the output bit
position passes data from the output data file to the physical output slot. A 0
inhibits the data from passing from the source to the destination.
Entering Parameters
SLOT: Specify the slot number and the word number pertaining to the slot.
A slot can have up to 8 words for fixed and SLC 5/01 and 32 words for SLC
5/02.
O:0.0 Outputs of slot 0, word 0 (fixed I/O controller)
O:1.0 Outputs of slot 1, word 0
O:2.0 Outputs of slot 2, word 1
Specification of slot/word numbers for the modular controller is similar
(except that slot 0 is not applicable).
Immediate Output with
Mask (IOM)