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24 ATR 621 - User manual

- Recovery will start only for holding steps or rising steps in heating regula-

tion or for falling steps in cooling regulation.

- To exit manually from recovery mode press o .

8.5 Waiting step end

This function has been conceived to control kilns working cycles, whenever

the kiln cannot follow gradients programmed by the user. If at step end the

di erence between process and setpoint values is greater than the value on

parameter 37, controller starts with the next step only after waiting for the

time programmed on parameter 36

, or when this gap becomes lo-

wer than parameter 37  .

5FNQFSBUVSFt5FNQFSBUVSB

5JNFt5FNQP

SETPOINT

Step 1 Step 2

Attesa ne step P-36

Step end max. gap (P-37)

Dierenza massima ne step (P-37)

Step 3

PROCESS

PROCESSO

- To exit manually from step end waiting function press .

- To disable this function  x at 0 end step waiting time .

- During end step waiting red display shows .

8.6 Heating / Cooling PID

ATR621 is suitable also for applications requiring a combined heating-coo-

ling P.I.D. action.

Command output has to be con gured as heating PID ( =  and

   greater than 0), and one of alarms (, , ) has to be con gured

as . Command output must be connected to actuator responsible for

heating action, while alarm will control the cooling action.

Parameters to con gure for heating PID are:

 =  Command output action type (Heating)

   : Proportional band heating

 : Integral time Heating and cooling

 : Derivative time Heating and cooling

 : Cycle time Heating

Parameters to con gure for cooling PID are (example: action associated to

alarm 1):

Pixsys ATR 621 series User Manual

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