Transducer Block
March 2006
5-31
Shutdown Trigger
The Shutdown Trigger (SHUTDOWN_TRIGGER
[76.1]) permits enabling or disabling Self Test
Shutdown for the Drive Current, Program Memory,
Static Memory, Processor, I/O Processor and
Outblock Timeout electronic alerts. When enabled,
and the alert condition is present, the transducer
Actual mode is placed Out of Service. The instrument
will attempt to drive the valve to the Zero Power
Condition and will no longer execute transducer
control function.
Shutdown Recovery
Shutdown Recovery (SHUTDOWN_RECOVERY
[76.2]) permits enabling or disabling Automatic
recovery from Self Test Shutdown. When enabled, the
transducer block will return to Target mode when the
condition that caused Shutdown clears. If not enabled,
the transducer block will remain Out of Service until
power is removed and restored or the user changes
the transducer block target mode to Manual or Auto. In
any case, the target mode will remain Out of Service,
if the condition that caused the shutdown remains or
while until the shutdown trigger is disabled.
Drive Current Config
(TB > Detailed Setup > Alerts > Elect and Config >
Drive Current Config)
Drive Current
Drive Current (DRIVE_CURRENT [54]) displays the
measured Drive Current actually flowing through the
I/P converter in percent of maximum drive.
Drive Current Alrt Pt
The Drive Current Alert Point
(DRIVE_CURRENT_ALRT_PT [76.4]) is when the
absolute difference between the Drive Current and
Drive Signal exceeds the set threshold for greater than
the Drive Current Alert Time.
Drive Current Alrt Time
The Drive Current Alert Time
(DRIVE_CURRENT_TIME [76.5]) is the maximum
time that the Drive Current Alert Point can be
exceeded before the Drive Current Alert is active.
Drive Signal
The Drive Signal (DRIVE_SIGNAL [53]) displays the
commanded Drive Signal being sent to the I/P
converter as a percentage of the maximum drive.
Output Blk Timeout
The Output Block Timeout (OUTPUT_BLK_TIMEOUT
[76.3]) is the maximum time between updates from the
AO or DO block to the transducer block setpoint.
Alert Key
The Alert Key (ALERT_KEY [4]) is the identification
number of the plant unit. Devices in a loop or plant
section can be assigned with a common alert key to
aid the operator in determining location of alerts.
Sensor and Enviro
(TB > Detailed Setup > Alerts > Sensor and Enviro)
Sensor Active
Sensor Active (SENSOR_ACTIVE [74.2]) displays
which of the following sensor alerts are active:
Travel Sensor— Active if the Travel Sensor reading is
outside the functional range.
Port A Pressure Sensor—Active if the Port A Pressure
Sensor reading is outside the functional range.
Port B Pressure Sensor—Active if the Port B Pressure
Sensor reading is outside the functional range.
Supply Pressure Sensor—Active if the Supply
Pressure Sensor reading is outside the functional
range.
Temperature Sensor—Active if the Temperature
Sensor reading is outside the functional range.
Sensor Enable
Sensor Enable (SENSOR_ENABLE [75.2]) permits
enabling or disabling the Sensor Alerts shown above.
Shutdown Trigger
The Shutdown Trigger (SHUTDOWN_TRIGGER
[76.1]) permits enabling or disabling Self Test
Shutdown for the Travel Sensor and Port A Pressure
Sensor sensor alerts. When enabled, and the alert
condition is present, the transducer Actual mode is
placed Out of Service. The instrument will attempt to
drive the valve to the Zero Power Condition and will no
longer execute transducer control function.
Shutdown Recovery
Shutdown Recovery (SHUTDOWN_RECOVERY
[76.2]) permits enabling or disabling Manual recovery
from Self Test Shutdown. When not enabled, the
transducer block will return to Target mode when the
condition that caused Shutdown clears. If enabled, the
transducer block will remain Out of Service until power
is removed and restored or the user changes the
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