Filter
Top Products
Instruction Manual
IM-106-880C, OI
September 2009
Hazardous Area OCX 8800
7-26
Figure 7-6. Analog Input
Function Block Schematic
Figure 7-7. Analog Input
Function Block Timing Diagram
Filtering The filtering feature changes the response time of the device to smooth
variations in output readings caused by rapid changes in input. You can adjust
the filter time constant (in seconds) using the PV_FTIME parameter. Set the
filter time constant to zero to disable the filter feature.
Signal Conversion You can set the signal conversion type with the Linearization Type (L_TYPE)
parameter. You can view the converted signal (in percent of XD_SCALE)
through the FIELD_VAL parameter.
Analog
Measurement
Access
Analog
Meas.
CHANNEL
SIMULATE
OUT_SCALE
XD_SCALE
FIELD_VAL
L_TYPE
IO_OPTS
PV_FTIME
MODE
STATUS_OPTS
HI_HI_LIM
HI_LIM
LO_LO_LIM
LO_LIM
ALARM_HYS
ALARM_TYPE
OUT_D
OUT
PV
Convert
Cutoff
Status
Calc.
Alarm
Detection
NOTES:
OUT = block output value and status.
OUT_D = discrete output that signals a selected alarm condition.
LOW_CUT
38740080
Filter
PV_FTIME
63% of Change
OUT (mode in man)
OUT (mode in auto)
PV
FIELD_VAL
38740081
Time (seconds)