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F
Fieldbus
™
OUNDATION
December 2022
Table 8-27: Troubleshooting
Symptom
Mode sheds from RCAS to AUTO.
Mode sheds form ROUT to MAN
Process and/or block alarms will
not work.
Mode will not leave out of service (OOS)
See
Mode will not leave out of service
Mode will not leave IMAN
Potential cause
The link is not configured; the status shows Not connected.
Recommended action
Configure the BKCAL_IN link to the downstream block.
192
(continued)
Possible causes
2. Cascade input
1. Remote cascade value
2. Shed timer
1. Remote output value
2. Shed timer
1. Features
2. Notification
3. Status options
Corrective action
2. CAS_IN
a. The link is not configured (the
status would show
connected
CAS_IN link to the block.
b.The upstream block is sending
back a Quality of
Not Invited
appropriate upstream block
diagnostics for corrective action.
1. Host system is not writing
RCAS_IN with a quality and status
of
good cascade
time (see 2 below).
2. The mode shed timer,
SHED_RCAS, in the resource block
is shed too low. Increase the value.
1. Host system is not writing
ROUT_IN with a quality and status
of
good cascade
time (see 2 below).
2. The mode shed timer,
SHED_RCAS, in the resource block
is shed too low. Increase the value.
1. FEATURES_SEL does not have
Alerts enabled. Enable the Alerts bit.
2. LIM_NOTIFY is not high enough.
Set equal to
3. STATUS_OPS has Propagate
Fault Forward bit set. This should
be cleared to cause an alarm to
occur.
(OOS).
Manual
00809-0500-4880
Not
). Configure the
or a Status of
Bad
. See the
within shed
within shed
.
MAX_NOTIFY
Emerson.com/Rosemount
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