Honeywell ST700 - Function Block Faults; Table 32: Identifying Critical and Non-Critical Function Block Faults

Page 112 FOUNDATION Fieldbus ST 700 Pressure Transmitter User's Guide Revision 2.0
Function Block Faults
Checking the status and values of key block parameters helps in identifying the type of
function block fault whether it is critical or non-critical. Table 32 helps in identifying the
type of function block fault and provides corrective action to restore normal operation.
Table 32: Identifying Critical and Non-critical Function block faults
Block. Parameter Value Fault
Type
Action
AI.OUT =
Bad/sensor
failure
Critical
See AI.BLOCK_ERR for message.
See Table 3 for details on
BLOCK_ERR.
See BLOCK_ERR of all blocks in
device for message. See Table 34.
STATUS = Bad/device
failure
Critical
See AI.BLOCK_ERR for message.
See Table 3.
See BLOCK_ERR of all blocks in
device for message.
See Table 34
Good/constant
Uncertain
Non-
critical
See Table 33
AI.ALARM_SUM.
CURRENT =
Block alarm Critical/
Non-
critical
See BLOCK_ERR of all blocks in
the device in Table 3.
Process alarm Non-
critical
See Table 33.
All Blocks
BLOCK_ERR=
Block
Configuration
Error (1)
Non-
critical
Check the value of all configurable
parameters in the block and correct
if necessary. See Resolving the
block configuration errors.
See Table 3 for
description of
BLOCK_ERR
(messages)
Simulation
Active (3)
Non-
critical
Set "simulate jumper" to "N" on the
electronics board, and set the
ENABLE_DISABLE field to “1” of
the SIMULATE parameter. See
section 6.5.
Input
Failure/Process
Variable has
Bad Status (7)
Critical
Write Processor or (4) to RESTART
parameter of resource block. If
failure continues, replace the meter
body.
Memory Failure
(9)
Critical Set Resource block to OOS.
Lost Static Data
(10)
Critical Write Processor or (4) to RESTART
parameter.
Lost NV Data
(11)
Critical Wait for 10 seconds.