Emerson Rosemount OCX 8800 Reference Manual page 158

Foundation Fieldbus
Table 7-26: Troubleshooting
Symptom
Process and/or block alarms will not
work.
Value of output does not make sense.
Cannot set HI_LIMIT, HI_HI_LIMIT,
LO_LIMIT, or LO_LO_LIMIT values.
148
(continued)
Possible cause
2. Configuration error
3. Resource block
4. Schedule
1. Features
2. Notification
3. Status options
1. Linearization type
2. Scaling
1. Scaling
Corrective action
2. BLOCK_ERR shows the configura-
tion error bit set. The following are pa-
rameters that must be set before the
block is allowed out of OOS.
a. CHANNEL must be set to a valid val-
ue and cannot be left at the initial val-
ue of 0.
b. XD_SCALE.UNITS_INDX must
match the units in the transducer
block channel value.
c. L_TYPE must be set to Direct, Indirect,
or Indirect Square Root and cannot be
left at the initial value of 0.
3. The actual mode of the resource
block is OOS. See Resource Block Di-
agnostics for corrective action.
4. Block is not scheduled and there-
fore cannot execute to go to Target
mode. Schedule the block to execute.
1. FEATURES_SEL does not have alerts
enabled. Enable the Alerts bit.
2. LIM_NOTIFY is not high enough. Set
equal to MAX_NOTIFY.
3. STATUS_OPTS has Propagate Fault For-
ward bit set. This should be cleared to
cause an alarm to occur.
1. L_TYPE must be set to Direct, Indirect,
or Indirect Square Root and cannot be
left at the initial value of 0.
2. Scaling parameters are set incor-
rectly:
a. XD_SCALE.EU0 and EU100 should
match that of the transducer block
channel value.
b. OUT_SCALE.EU0 and EU100 are not
set properly.
1. Limit values are outside the OUT_
SCALE.EU0 and OUT_SCALE,EU100
values. Change OUT_SCALE or set val-
ues within range.
OCX 8800