Function Parameter Reference Guide
126 UDC2300 Controller Product Manual 12/00
12.2.18 BLOCK (ALARM BLOCKING)
This prompt is part of the Alarms Set up group.
Prevent nuisance alarms when the controller is first powered up. The alarm is suppressed
until the parameter gets to the non-alarm limit or band. Alarm blocking affects both alarm
setpoints.
ATTENTION
When enabled on power up or initial enabling via configuration, the alarm will not activate unless
it has not been in alarm for one cycle (167 ms).
Selections Definitions
DIS
Disable Blocking
BK1
Blocks Alarm 1 only
BK2
Blocks Alarm 2 only
BK12
Blocks Alarm 1 and Alarm 2
12.2.19 BRNOUT (BURNOUT PROTECTION - SENSOR BREAK)
This prompt is part of the Input 1 Set up group.
BURNOUT PROTECTION (SENSOR BREAK) provides most input types with upscale
or downscale protection if the input fails. 1-5V, 0-10V, or 4-20 mA inputs require no
burnout or NONE selection.
Selections Definitions
NONE NO BURNOUT—Pre-configured Failsafe output applied if failed input is
detected (does not apply for an input out of range). Error message IN 1 FAIL
is flashed on the lower display intermittently every 10 seconds.
UP
UPSCALE BURNOUT —will make the PV signal increase to full scale,
+10 %, when a sensor fails, and flash IN 1 FAIL on the lower display
intermittently every 10 seconds.
The controller remains in Automatic control mode and adjusts the controller
output signal in response to the full scale PV signal developed by the
Burnout circuitry.
DOWN
DOWNSCALE BURNOUT —will make the PV signal decrease to the
lower range value, -10 %, when a sensor fails, and flash INPUT 1 FAIL on
the lower display intermittently every 10 seconds.
The controller remains in Automatic control mode and adjusts the controller
output signal in response to the zero percent PV signal developed by the
Burnout circuitry.
NOFS NO FAILSAFE —This selection does not provide input failure detection
and should only be used when an absolute accuracy is the most important
criteria. (For this selection, no burnout signal went to the sensor.)
To Next Page
Loading...
