Revision 2.0 FOUNDATION Fieldbus ST 700 Pressure Transmitter User's Guide Page 97
6.3 Troubleshooting blocks
Non-functioning blocks
Device block objects may not be running (executing their function block schedules) or the
blocks may be in Out of Service (OOS) mode due to block configuration error. For
example, if the AI function block is in OOS mode, the block does not provide updated
output values, although the AI block may be running. While troubleshooting a non-
functioning block objects, it is recommended to start with the resource block. For example,
if the resource block is in OOS mode, all other blocks in the device are also in the OOS
mode.
Troubleshooting block configuration errors
The block configuration errors prevent a device block from leaving the OOS mode. The
BLOCK_ERR parameter (bit 1) shows whether a block configuration error is present. The
following section explains the troubleshooting for all the function blocks:
Troubleshooting the Resource block
Table 19: Resource block
Problem cause Things to check Recommended action
Resource block mode is OOS
mode and is not going 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.
Resource block is not running.
Check BLOCK_ERR for errors.
See Table 3 for details on
BLOCK_ERR.
Incorrect revision level of the
device firmware.
Read REVISION_ARRAY
See section 6.2.
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.
Field diagnostics alarms are
not reporting.
Check Field Diagnostics MASK. If the alarms are MASKED, then the
alarms do not report. Unmask the
alarms.
Check Field Diagnostics Priority. If the priority is zero alarms do not
report. For information on how set the
priority, see Table 4.
Check Field Diagnostics MAP. If alarms are not mapped, then Map
alarms to any of the Field Diagnostics
alarm parameters.
To Next Page
Loading...
