Troubleshooting The Arithmetic Block; Table 29: Arithmetic Block - Honeywell SLG 700 Option Manual

Troubleshooting the Arithmetic block

Problem Cause
Arithmetic block mode
is in OOS and does
not change to AUTO
mode.
Mode does not
change from OOS.
Value of output is
incorrect
Block alarms are not
reported.
Page 188
Table 32: Arithmetic block
Things to check
Read
MODE_BLOCK.PERMITTED
Read MODE_BLOCK.
ACTUAL of Resource block.
Configuration error.
Error in configuration.
Read FEATURE_SEL.
Read LIM_NOTIFY.
FOUNDATION Fieldbus Option User's Guide
Recommended Action
Add AUTO mode to
MODE_BLOCK.PERMITTED.
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.
BLOCK_ERR shows the Block
Configuration Error condition,
since ARITH_TYPE is not set.
Ensure that engineering units are
correct for the computation. If
that fails, see section 3.
Reports are not selected in
FEATURE_SEL. If features do
not include reports then the host
must poll for alarms.
Set LIM_NOTIFY to a value
higher than zero, but not higher
than MAX_NOTIFY.
Rev. 3.0