Siemens SITRANS FC330, Руководство по эксплуатации, Страница: 135 / 280

Channel HW configuration
(fixed when ordering)
SW configuration
available to the user
4 Signal output
● Current (0/4-20 mA)
● Frequency or pulse
● Three-stage analog valve dosing control
● Discrete one or two-valve dosing control
● Operational and alarm status
Relay output
● Discrete one or two-valve dosing control
● Operational and alarm status
Signal input
● Dosing control
● Totalizer reset
● Remote zero adjust
● Force or freeze output(s)
8.2.6.1 Current output
All four channels can be configured as current output.
Current output configuration
The following process values can be assigned to the current output:
● Mass flow
● Volume flow
● Standard volume flow
● Density
● Temperature
● Fraction A (Volume flow or Mass flow)
● Fraction B (Volume flow or Mass flow)
● Fraction A %
● Fraction B %
● Control valve *
The process variable listed above with * is not available to be allocated to the 4 to 20 mA output
on Channel 1. All process variables are available through bus communication (SV, TV and QV
variables) and on all of Channels 2 to 4.
The accuracy specified for the analog output signal applies only within the range 4 to 20 mA.
Lower limit (4 mA) and upper limit (20 mA) can be assigned to any specific flow values.
Parameter assignment
8.2 Functions
SITRANS FC330
Operating Instructions, 01/2019, A5E44030648-AB
135