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7 .4 run switching i/o selections – KROHNE Summit 8800 Vol 2 User Manual

Page 128

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128

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08/2013 - MA SUMMIT 8800 Vol2 R02 en

SUMMIT 8800

RUN SWITCHING

07

Figure 129 Stream run switching valve control

Control run flow valve

If the flow control valve is to be controlled – yes or no

Run flow control reverse

If the flow control valve is permitted to work with reverse

flow

Run flow control keypad setpoint

User defined setpoint for flow

Run flow control Pband

Time based on present error

Run flow control Iaction

Accumulation of past errors

Run flow control Daction

Prediction of future errors

Run flow control minimum output level

Minimum flow output limit from valve

Run flow control maximum output level

Maximum flow output limit from valve

7 .4 Run switching I/O selections

Figure 130 Run switching digital input selection

Inputs required

Local > stream n > run switching > inlet / outlet / prover inlet valve

Run inlet open feedback

Open status received from the valve.

Run inlet close feedback

Closed status received from the valve.

Run inlet failure feedback

Failure indication received from the valve

Run inlet automatic feedback

Mode selection received from the valve