Page 104 FOUNDATION Fieldbus ST 700 Pressure Transmitter User's Guide Revision 2.0
Troubleshooting the Input Selector block
Table 26: Input Selector block
Problem Cause Things to check Recommended Action
Input Selector block mode
is in OOS and does not
change to AUTO mode.
Read
MODE_BLOCK.PERMITTED.
Add AUTO mode to
MODE_BLOCK.PERMITTED.
Read MODE_BLOCK. ACTUAL of
Resource block.
If necessary, Set
MODE_BLOCK.TARGET to AUTO.
NOTE: If the mode is set to OOS for
maintenance then do not change the
mode to AUTO.
Schedule Block is not scheduled and therefore
cannot execute to go to Target Mode.
Schedule the block to execute.
Input Selector block mode
is in OOS mode with
Block configuration Error.
Check SELECT_TYPE SELECT_TYPE must be set to a valid
value and cannot be left at 0.
Status of output is Bad. Check Inputs Make sure at least one input has status
as good.
Check OP_SELECT OP_SELECT is not set to 0 (or it is
linked to an input that is not used), and it
points to an input that is Bad.
Check MIN_GOOD
Make sure that value entered in
MIN_GOOD is greater or equal to actual
number of Good inputs.
Block alarms are not
reported.
Read FEATURE_SEL.
Reports are not selected in
FEATURE_SEL. If features do not
include Reports then the host must poll
for alarms.
Read LIM_NOTIFY. Set LIM_NOTIFY to a value higher than
zero, but not higher than MAX_NOTIFY.
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