4–17Scanner Configuration and Programming
Publication
17476.6 - July 1996
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.
Default:
When the processor enters Run or Test mode, the scanner
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 File
0123456789101112131415
Bit Number (decimal)
M0
(Control) File Words 24 through 27
Logical Rack 0 Remote Output Reset Word 24
M0:e.24
M0:e.25
M0:e.26
M0:e.27
Logical Rack 1 Remote Output Reset Word 25
Logical Rack 2 Remote Output Reset Word 26
Logical Rack 3 Remote Output Reset Word 27
e = slot number of the SLC rack containing the scanner
x = not used/defined
Not Defined
Starting Group
0246
1001xxxxxxxxxxxx
1000xxxxxxxxxxxx
0100xxxxxxxxxxxx
0100xxxxxxxxxxxx
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