1747-6.22, Backup Scanner User Manual

5-72 Scanner Configuration and Programming
M0 File - RIO Device
Inhibit Control
Logical Rack 0 Device Inhibit Word 8
Logical Rack 1Device Inhibit Word 9
Logical Rack 2 Device Inhibit Word 10
Logical Rack 3 Device Inhibit Word 11
Publication 1747-6.22
G File
Bit Number (decimal)
Device Address, Word 1
MO (Control) File
Bit Number (decimal)
Logical Rack 0 Device Inhibit Word 8
Logical Rack 1Device Inhibit Word 9
Logical Rack 2 Device Inhibit Word 10
Logical Rack 3 Device Inhibit Word 11
M0 Words 8 through 11 - you use these words to command the
scanner to stop scanning logical racks 0, 1, 2, and 3. Bits 0 - 3 in each
word correspond to I/O group locations within logical racks 0, 1, 2,
and 3.
To stop scanning (inhibit) a device listed in the configuration (G) file,
set the bit corresponding to the starting group address of the device to
1. Setting bits that do not correspond to the device logical starting
group address does not inhibit the device. To resume scanning a
device, reset the bit (which corresponds to the starting group address
of the device) to 0.
Inhibiting a device does not affect the current settings of the Device
Fault Status (words 12 - 15 of the M1 file). Inhibited devices
eventually time out and either return to their last state or reset
(depending on the device’s last state setting).
Default: When the processor enters the Run mode, the scanner
automatically inhibits any device not configured in the G file (bit set
to 1). Attempting to inhibit an unconfigured device has no effect.
15
x
x
x
x
MO (Control) File Words 8 through 11
14
x
x
x
x
13
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
Example of Device Inhibit Control
x
x
x
x
The 1747-BSN Scanner inhibits (sets to 1) the bits in M0:e.8 through
M0:e.11 (by default) wherever there are no configured devices
present. The illustration below compares the configured devices
(G file word 2) to the groups that the scanner automatically inhibits.
RIO Logical Rack 3
Starting Group
6
1
15
x
x
x
x
4
1
14
x
x
x
x
2
1
13
x
x
x
x
12
0
0
12
x
x
x
x
Not Defined Starting Group
11
11
10
10
9
RIO Logical Rack 2
Starting Group
6
0
x
x
x
x
x
x
x
x
e = slot number of the SLC rack containing the scanner
x = not used/defined
4
1
2
1
9
x
x
x
x
8
0
0
8
x
x
x
x
7
7
x
x
x
6
x
x
x
x
6
x
x
x
5
x
x
x
x
RIO Logical Rack 1
Starting Group
6
1
x
4
1
x
2
1
5
x
x
x
x
4
x
x
x
x
0
1
4
x
x
x
x
6
3
0
0
1
0
6
1
3
0
0
1
0
4
2
1
0
0
0
4
0
2
1
0
0
0
1
2
1
0
0
0
RIO Logical Rack 0
Starting Group
2
0
1
1
0
0
0
0
0
0
0
1
1
0
1
0
0
0
1
1
M0 File
M0:e.8
M0:e.9
M0:e.10
M0:e.11
M0 File
M0:e.8
M0:e.9
M0:e.10
M0:e.11