Logical device fault status -27, Logical device fault status, Important – Rockwell Automation 1747-SN Remote I/O Scanner User Manual
Page 71: M1 (status) file - w ord 5
Publication 1747-UM013B-EN-P - January 2005
Scanner Configuration and Programming 4-27
Logical Device Fault Status
Words 12 through 15, bits 0 to 7 - indicate the device fault status for
logical racks 0, 1, 2, 3, 8, 9, 10, and 11. Bits 0 through 3 are for
primary/normal devices and bits 4 through 7 are for complementary
devices. Each bit corresponds to a quarter logical rack location. If a
device is not responding to communications, has gone off line, or is
configured to an incorrect logical rack size, all bits corresponding to
the device will be set to 1. This is highlighted in the example below.
IMPORTANT
When a primary device is inhibited, its
complementary device is also inhibited. A
complementary device cannot be exclusively
inhibited.
0
RIO Rack 8
Starting Group
0
2
4
6
RIO Rack 9
Starting Group
0
2
4
6
RIO Rack 10
Starting Group
0
2
4
6
RIO Rack 1 1
Starting Group
0
2
4
6
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
M1 File
Complementary Logical Device Address, Word 3
M1:e.3
Complementary Logical Image Size, Word 4
M1:e.4
Complementary Active Device Status, Word 5
M1:e.5
1
1
0
0
1
0
0
0
0
1
0
0
0
1
0
0
1
0
1
1
1
1
1
0
1
1
0
0
1
1
1
1
0
0
1
1
0
0
0
0
1
0
0
0
0
0
0
A 0 indicates that the device is
inhibited, not responding to
communications, or configured to
an incorrect logical rack size.
M1 (Status) File - W ord 5
Bit Number (decimal)
A 1 indicates that the configured
device is active.