8.2.8.2 Valve control configuration
Valve control dosing
Dosing is controlled with either one or two discrete valves or a single analog valve. The
transmitter provides up to three input/output channels which can be used for dosing control.
The selection of channels is fixed when ordering the system. The channels can be setup for
dosing functionality in parameter 2.5.1 "Dosing Mode" as shown in the table below. Allocation
of the output to a specific dosing sequence element is performed in the software configuration
as follows:
One on/off valve
Configuration of one valve (primary valve).
One of the following channels must be assigned to control the discrete primary valve.
Table 8-1 One on/off valve
Valve control Channel HW con‐
figuration
Output
channel
Channel SW configuration
Menu item Value
Discrete valve con‐
trol - Primary Valve
Signal output 2 2.4.2.1 "Operation Mode" Status Output
2.4.2.27 "Status Mode" Primary Valve Dosing
3 2.4.3.1 "Operation Mode" Status Output
2.4.3.29 "Status Mode" Primary Valve Dosing
4 2.4.6.1 "Operation Mode" Status Output
2.4.6.27 "Status Mode" Primary Valve Dosing
Relay output 3 2.4.4.1 "Status Mode" Primary Valve Dosing
4 2.4.7.1 "Status Mode" Primary Valve Dosing
Two on/off valves
Configuration of two valves (primary and secondary valves)
Parameter assignment
8.2 Functions
SITRANS FC330
148 Operating Instructions, 01/2019, A5E44030648-AB
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