M0 File - Remote Output Reset Control - Allen-Bradley 1747-SN User Manual

Bit Number (decimal)
Logical Rack 0 Remote Output Reset Word 24
Logical Rack 1 Remote Output Reset Word 25
Logical Rack 2 Remote Output Reset Word 26
Logical Rack 3 Remote Output Reset Word 27
Scanner Configuration and Programming

M0 File - Remote Output Reset Control

M0 Words 24 through 27 – you use these words to command a
logical device to reset all of its outputs when the SLC processor
leaves the Run mode and enters the Test, Program, or Fault mode
(regardless of the device's Hold Last State setting).
Resetting the bit (corresponding to the starting address of a device)
to 0 allows the Hold Last State switch on the logical device to
determine output operation when the SLC processor leaves the Run
mode. Setting the bit to 1 will command all outputs off (regardless
of the device's Hold Last State setting).
Only the device's logical starting address bit matters. Setting other
bits has no effect. Bits 0 – 3 correspond to I/O group locations
within logical racks 0, 1, 2, and 3.
When the processor enters Run or Test mode, the scanner
Default:
sets the starting address bit of each device configured in
the G file to 1.
ATTENTION: The use of the device's Hold Last
State switch can result in its outputs remaining
!
energized when not under control of the SLC
processor. We recommend the use of this function only
by experienced SLC programmers.
M0 (Control) File Words 24 through 27
Not
15 14 13 12 11 10
x x x x x x
x x x x x x
x x x x x x
x x x x x x
e = slot number of the SLC rack containing the scanner
x = not used/defined
Defined
9 8 7 6 5 4
x x x x x x
x x x x x x
x x x x x x
x x x x x x
4–17
Starting Group
6 4 2 0
3 2 1 0
M0 File
M0:e.24
1 0 0 1
M0:e.25
0 0 0 1
M0:e.26
0 0 1 0
M0:e.27
0 0 1 0
Publication 1747 6.6 - July 1996