Hardware reference guide

I/O Modules
35013379 02 October 2007 705
State of output point, Status bits, LEDs and Fault Bit for the three operating states
are as follows:
YES: Module outputs that fault during the ON state are controlled by a thermal
protection mechanism. At shutdown the appropriate fault/status indications will be
present.
After shutdown, the output device will cool and try to turn itself back on. If the fault
has been removed, the output will function normally and fault/status indications will
be removed. If the fault is still present. the point will again shut down and repeat the
cycle until the fault is removed or the point is commanded off.
When a faulted point is commanded off, all fault indications will no longer be present
because the miscompare will no longer exist.
Mode Fault Occurs (Point
commanded ON
shuts OFF)
Off command sent On command sent
(After fault is
removed)
Verified health Output point=OFF
Status bit=0
Output LED=OFF
Fault LED=ON
Group fault flag=1
Output point=OFF
Status bit=0
Output LED=OFF
Fault LED=ON
Group fault flag=1
Output point=ON
Status bit=1
Output LED=ON
Fault LED=OFF
Group fault flag=0
Verified fault Output point=OFF
Status bit=1
Output LED=OFF
Fault LED=ON
Group fault flag=1
Output point=OFF
Status bit=1
Output LED=OFF
Fault LED=ON
Group fault flag=1
Output point=ON
Status bit=0
Output LED=ON
Fault LED=OFF
Group fault flag=0
Actual Output point=OFF
Status bit=0
Output LED=OFF
Fault LED=ON
Group fault flag=1
Output point=OFF
Status bit=0
Output LED=OFF
Fault LED=ON
Group fault flag=1
Output point=ON
Status bit=1
Output LED=ON
Fault LED=OFF
Group fault flag=0
Possible Safety Hazard
When choosing "YES", the use of thermally protected output devices with the
140DVO85300 module can produce safety concerns.
In the event of an enabled output sensing an overcurrent condition, the output will
disable, until the overcurrent condition is removed. The output will then re-enable
itself, if still set ON in the logic program.
Failure to follow these instructions can result in death, serious injury, or
equipment damage.
WARNING
This document provided by Barr-Thorp Electric Co., Inc. 800-473-9123 www.barr-thorp.com