Rosemount Oxymitter 5000, Instruction Manual

Page: 209 / 214

Instruction Manual
IM-106-350C, Rev 2.2
July 2008
E-17
Hazardous Area Oxymitter 5000
Mode sheds
from RCAS to
AUTO 1. Remote Cascade Value
2. Shed Timer
1. Host system is not writing RCAS_IN with a
quality and status of “good cascade” within shed
time (see 2 below).
2. The mode shed timer, SHED_RCAS in the
resource block is set too low. Increase the value.
Mode sheds
from ROUT to
MAN 1. Remote output value
2. Shed timer
1. Host system is not writing ROUT_IN with a
quality and status of “good cascade” within shed
time (see 2 below).
2. The mode shed timer, SHED_RCAS, in the
resource block is set too low. Increase the value.
Process and/or
block alarms
will not work 1. Features
2. Notification
3. Status Options
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 Forward
bit set. This should be cleared to cause an alarm
to occur.
Symptom Possible Causes Corrective Action