Allen-Bradley FLEX I/O 1794-OB8EP, Руководство по установке, Страница: 9 / 16

24V dc FLEX I/O Electronically Fused 8 Output Module 9
Publication 1794-IN020B-EN-P - May 2002
Image Table Mapping
Decimal Bits
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
IW F7 F6 F5 F4 F3 F2 F1 F0
Reserved (see note)
OW Not used FR O7 O6 O5 O4 O3 O2 O1 O0
OW2 Reserved
Where: IW = input word
OW = output word
F = overload fault bits - 1 = fault present; 0 = no fault
O = output data (O0 corresponds to output 0, O1 corresponds to output 2, etc.)
FR = fault reset bit - 1 = reset output; 0 = no change.
Note: The unused lower byte in read word 1 floats during operation. Do not use this byte for fault
status. See Programming" below.
Programming
If your program automatically checks for fault bits, bits 8 through 15 of
read word 1 must be masked. This is a sample program for a module at
rack address 1, group 0. Add similar rungs to your program.
MVM
MASKED MOVE
Source:
Mask:
Destination:
I:010
FF00
N9:0
CMP
Compare
Expression
N 9:0 < > 0
Out
(
)
O:000
This rung masked bits 8 thru 15.
This rung turns on output if a fault occurs.