Flowserve StarPac II Control Valves - Manual (Page 24)

ISA Dn Stream Press - Current compensated downstream line
pressure (defined as six pipe diameters downstream of the
valve).
ISA Delta Pressure - Current differential pressure using the
pressure definitions above.
Process Temperature - Current process temperature.
Gas Flow - Current gaseous flow rate.
Auxiliary 4-20 Input - Re-transmits the 4-20 mA signal from
analog in No. 2.
Register Number - Allows the selection of any internal register
value as an output. If a string register is selected, zero will be
displayed in the data field.
Analog Out 2 - This option configures the second analog output
channel. Select a variable from the list using the NEXT and
PREVIOUS function keys on the menu. You will then be asked for a
full scale output value in your selected user units. (This is the
process value that corresponds to 20 mA.) The last step is to enter
the offset or zero output value in your selected user units. (This is
the process value that corresponds to 4 mA.) Available output
variables are:
Valve Position - Current valve position.
Liquid Flow - Current liquid flow rate.
ISA Up Stream Press - Current compensated upstream line
pressure (defined as two pipe diameters upstream of the valve).
ISA Dn Stream Press - Current compensated downstream line
pressure (defined as six pipe diameters downstream of the
valve).
ISA Delta Pressure - Current differential pressure using the
pressure definitions above.
Process Temperature - Current process temperature.
Gas Flow - Current gaseous flow rate.
Auxiliary 4-20 Input - Re-transmits the 4-20 mA signal from
analog in No. 2.
Analog Command - This option sets up the first analog input
(analog No. 1) in the StarPac II system. This analog channel is
reserved as a control input. The signal is used either as a valve
position command, if the StarPac II is in Manual mode, or as the
controller setpoint if the StarPac II is in Auto mode. (The source of
the command or setpoint is selected in the T
UNE menu after it has
been configured here.) When this option is selected you are first
prompted for the interpretation of the analog signal. The signal can
be interpreted as Normal (4-20 mA = 0-100%), which means that 4
mA will indicate the 0 percent signal, or as Reverse (4-20 mA = 100-
0%), which then interprets 20 mA as the 0 percent signal.
Next, you are prompted for the hold time (in seconds) that you want
the system to hold the last command if the 4-20 mA signal should be
lost (defined as having the signal drop below 3 mA). The last prompt
requests a ramp rate that the system will use to fail the valve if the
signal has been lost and the hold time has expired. A negative value
will ramp the valve closed at the selected rate, and a positive value
StarPac II User Interface Manual 18