Emerson Rosemount OCX 8800, Instruction Manual

Page: 125 / 306

Instruction Manual
IM-106-880C, OI
Section 7: Foundation
Fieldbus
April 2017
PWA
Simulate
99
Line Input Out
of Range
Inter Board
Communicatio
n Failure
Simulate
Active
Transducer
Block:
1) Line
Frequency
Error
2)
Line Voltage
Low
3)
Line Voltage
High
Transducer
Block:
Inter Board
Communicatio
n Failure
Device
Alerts
FF/
Device
Alerts
FF/
Device
Alerts
This alert
indicates that
the line input
power to the
device is
outside the
proper
operating
limits.
This alert
indicates a
communicatio
n failure
between the FF
board and the
device.
This alert
occurs when
the PWA
simulate mode
is active.
Check line input
power for proper
voltage and
frequency.
Verify device is
powered. Check
the installation of
the Fieldbus
Output Board on
its carrier board. If
the above are OK,
replace the carrier
board and/or
Fieldbus Output
Board.
The device power supply continuously
monitors the line input. Measured variations
in the line input power are used to
compensate the sensor heater control and
check for faulty line conditions. Refer to
Section 8, Overview page 165 for details.
There is no communication possible between
the Fieldbus Output Board and the device’s
computer board.
The PWA active parameters can now be
written. The resource block detailed status
parameters and the internal alerts in the
Transducer Block where the PWA active
alarms originate can also be written.
7.7.3 PWA Simulate
Setting PWA_SIMULATE to ON allow simulating the PWA parameters, FAILED_ACTIVE,
MAINT_ACTIVE and ADVISE_ACTIVE. “Allowing Simulating” means that these parameters get
write permission and the host’s written value is the only one which is used for parameter’s read
back value. The data which comes from the Hazardous Area OCX 8800 is not used in this case.
What does
AMS the alert
Alerts Alarms Tab indicate?
Recommended
Action Description