Siemens SITRANS FC430, Руководство по эксплуатации

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Table 8-4 Parameter settings for Two on/off valves valve control
Valve control parameter config‐
ured in each recipe
Default values Description
Stage 1 Primary Open 0.00 % of Amount The quantity or percent of the Amount at
which the primary valve will open
Stage 1 Primary Close 80.00 % of Amount The quantity or percent of the Amount at
which the primary valve will close
Stage 2 Secondary Open 20.00 % of Amount The quantity or percent of the Amount at
which the secondary valve will open
Stage 2 Secondary Close 100.00 % of Amount The quantity or percent of the Amount at
which the secondary valve will close
Either Stage 1 Primary Open or Stage 2 Secondary Open must be set to 0. For controlling the
valves via the outputs, two of channels 2, 3 and 4 must be assigned to Primary Valve Dosing
Control and Secondary Valve Dosing control, respectively.
Either Stage 1 Primary Close or Stage 2 Secondary Close must be set to Amount.
In the examples below the primary valve, the secondary valve, and the flow are indicated as
follows:
)&
①
Primary valve
②
Secondary valve
Examples of valve control configuration
Example 1: Open primary valve at 0 %; close primary valve before closing secondary valve
configured in recipe 1
Parameter configuration:
Menu 2.5 Dosing
- 2.5.1 Dosing Mode = Two on/off valves
Menu 2.5.5.6 Valve Control
- 2.5.5.6.1 Stage Setup Format = Relative
- 2.5.5.6.2 Stage 1 Primary Open = 0 %
- 2.5.5.6.3 Stage 1 Primary Close = 66 %
- 2.5.5.6.4 Stage 2 Secondary Open = 33 %
- 2.5.5.6.5 Stage 2 Secondary Close = 100 %
Functions
8.8 Dosing
FC430 (From firmware 4.0)
174
Operating Instructions, 06/2017, A5E39789392-AA