Honeywell ST700 - Page 127

Revision 2.0 FOUNDATION Fieldbus ST 700 Pressure Transmitter User's Guide Page 113
Block. Parameter Value Fault
Type
Action
Readback
Check Failed
(12)
Critical See Critical Fault NOTE.
Out-of-Service
(15)
Non-
critical
Write proper mode to MODE_BLK
parameter.
Unable to write
values to valid
device
parameters.
Configur
ation
Error
See “Resolving the block
configuration errors”.
ATTENTION
Depending on the fieldbus interface application, device operating status and
parameter values may appear as text messages. The text in the table is
typical of values or messages seen when using the NI-FBUS configurator.
Critical Fault
In the case of a critical fault due to Memory Failure, NV/Static data loss or the
readback check failure, writes to the RESTART parameter twice, for the
transmitter to fully recover from the fault condition. Therefore:
1. Write “4” or “restart processor” to RESTART parameter of resource
block.
2. Wait until communication is established.
3. If the fault occurs again, repeat the write to the RESTART parameter.
4. If the fault occurs again, replace the transmitter electronics module.
Note that if a ROM error (Memory Failure) occurs in the resource block, it
may take up to 10 seconds for the fault to reappear.