Process Value Monitoring - Fisher DPR900 User Manual

Controls and Indicators 3-3
3.2.1
3.2.2
3.2.3
3.2.4
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DPR91c-89
Process Value
During normal operation the process value is displayed with the
proper engineering unit.
Setpoint
When either of the green increase/decrease buttons is pressed, the
setpoint is shown on the digital display. SP will be displayed on the
left. After 5 seconds, the display returns to the process value.
Alarms
A flashing H or L indicates that a high or low alarm limit has been
reached. High-high and low-low alarm limits are indicated by a faster
flashing rate. Alarm indications are displayed until the alarm
condition is corrected.
Fault Codes
The types of fault codes displayed are:
n
Wrong button error
n
Warning
n
Fatal error.
An attempt to perform an improper operation by pressing one of the
controller buttons (attempting to switch in computer control when it
has not been configured), will cause Error to appear on the display
for a few seconds.
A flashing E indicates a warning. Press the PROG button to check
the type of warning condition present (refer to fault codes in
Appendix A).
The fault can be acknowledged by pressing the SET button or saved
by pressing the PROG button. If several faults are present, they are
displayed by pressing the green increase/decrease buttons.
The display may be returned to the process value by pressing the
PROG button twice.
May 1991
UM6.7:DPR900:9102