Response Electronics CL6011B Dokumentacja Pobierz pdf (Strona 167)

4Ć85FST Configuration

Original Ć June 1990 CE4.2:CL6211

GCI GCI

INSTRUCTION NAME: GCI (gas chromatograph interface)

DESCRIPTION: This instruction performs a sample and hold operation on the SVA input

whenever the GCI data ready input (operand 3) makes a 0 to 1 transition. The GCI function will

enable integral control action for the length of time specified by operand 1 (controller time on) after

the GCI data ready input has made a 0 to 1 transition. The controller integral action is then held after

the controller time on has elapsed. During this time, there will be no change to the SVA output of

the CNTRL (control) function because the SVA output of the GCI function is also the SVA input to

the control block. When used, the feed forward function is active when the control algorithm is

being held by the GCI function. Therefore, the output from the station will change when there is a

change in feed forward control action.

If a new GCI data ready input is not received by the time the GCI function has timed out, the GCI

function sets the control loop to the manual mode and sets its SVD output to a logic 1 to indicate

timeout. A new data ready trigger will reset the SVD output to a logic 0, but will not automatically

switch mode. On power up, the SVA and SVD outputs are set to 0.

GRAPHIC REPRESENTATION: SYMBOLIC REPRESENTATION:

INPUT

OUTPUT

SVA

OPERAND 3

OPERAND 2

TIMERS/H

CONFIGURATION FORMAT: GCI (

Controller time on >>

GCI timeout time >>

GCI data ready >>

Comment >>

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