Honeywell ST700 - Troubleshooting the Arithmetic Block; Table 28: Arithmetic Block

Page 106 FOUNDATION Fieldbus ST 700 Pressure Transmitter User's Guide Revision 2.0
Troubleshooting the Arithmetic block
Table 28: Arithmetic block
Problem Cause Things to check Recommended Action
Arithmetic 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.
Mode does not change
from OOS.
Configuration error.
BLOCK_ERR shows the Block
Configuration Error condition, since
ARITH_TYPE is not set.
Value of output is
incorrect
Error in configuration. Ensure that engineering units are
correct for the computation. If that
fails, see section 3.
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.