Helios PD2-6080/PD2-6081 Modbus
®
Scanners
Instruction Manual
66
Low-Flow Cutoff (
CutofF
)
The low-flow cutoff feature allows the scanner to be
programmed so that the often unsteady output from a
differential pressure transmitter, at low flow rates,
always displays zero on the scanner. The cutoff value
may be programmed from 0.1 to 999999. When the
input data is below the cutoff value, the scanner will
display zero. Programming the cutoff value to zero
disables the cutoff feature. The cutoff can be disabled
to display negative values.
Analog Output Source
Programming (
aoutpr
)
The 4-20 mA analog outputs can be programmed for
source of data, overrange and underrange, absolute
maximum and minimum output, and communications
break values. They can also be recalibrated.
•
To calibrate the analog outputs, follow the
graphic above.
•
The overrange and underrange values are the
values that will be output when the display shows
an overrange or underrange condition. This
setting is common to all analog outputs.
•
The maximum and minimum values are the
absolute limits for the 4-20 mA output. This
setting is common to all analog outputs.
•
The communications break value determines the
mA output when a Slave fails to reply to a
command within the Response time.
Analog Output Value for Loss of
4-20 mA Input (Loop Break)
The AoutPr - Break menu is used to force the analog
output to go to a user-specified mA value if a break
condition is detected in the 4-20 mA input loop.
Selecting Ignore causes the mA output to go to the
minimum value.
