Honeywell 900U02-0100 - Table 34 - Bad I;O Channel Diagnostics

204 ControlEdge HC900 Process & Safety Controller User and Installation Manual Revision 10
May 2019
Number
of
Strobes
Failure
Description
UIO
AI
AO
DI
DO
PFQ
User Action
Contact
AC
DC
Relay
AC
DC
5
+24 V




1. Remove the module and
check for a bent pin, then
reinsert the module
2. Measure power supply
voltage. If not correct, replace
power supply.
3. Replace module
4. Replace rack
6
FACTORY
CAL
CRC failure of primary
and backup factory
calibration


Replace module.
7
FIELD CAL
CRC failure of field
calibration values


1. Remove/reinsert module.
2. Replace module.
8
HARDWA
RE
General Hardware
Failure (AI=convertor
not working)

Replace module.
9
HW/SW
Key
The software residing
on the module does
not match the module
type. This diagnostic
should only result in
the factory.





Replace module
11
Shift
Register
The loopback test of
the shift register failed.






Replace module
Bad I/O Channel Diagnostics
Individual channels on I/O modules indicate their diagnostics by 6 flashes on the Scanner and CPU; the
channel’s LED does not indicate a diagnostic. Table 34 is a list of conditions that can cause a bad channel
diagnostic.
Table 34 – Bad I/O Channel Diagnostics
Channel
Type
Failure message
indicated on Honeywell
OI or Honeywell
HCDesigner/Utilities
function block monitor
Description
User Action
AI
Burnout Failure
The sensor – T/C, RTD, or mV source -- is
failing burnout checks.
Check terminal block
connections
Replace source element
Replace module.
Under range
The signal at the terminals is less than
10% below the range of the sensor.
Check the signal level being
applied to the terminals.
Replace module.
Over range
The signal at the terminals is more than
10% over the range of the sensor.
Check the signal level being
applied to the terminals.
Replace module.