24 ATR 421 - User manual
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
w.t.S.e., or when this gap becomes lo-
wer than parameter 37
M.G.S. e..
5FNQFSBUVSFt5FNQFSBUVSB
5JNFt5FNQP
SETPOINT
Step 1 Step 2
Attesa ne step P-36
Attesa ne step P-36
Step end max. gap (P-37)
Dierenza 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 w.t.S.e.
- During end step waiting red display shows wait.
8.6 Special functions for Gas kilns
ATR421 integrates gas kilns control functions. For a correct operation it is ne-
cessary to check the following settings.
8.6.1 Gas - Outputs selection
• Valve selection. Select
c.uaL.
on parameter 1
c.out
. Q1 becomes com-
mand valve. N.O. and N.C. contacts of this output are activated indepen-
dentely from each other: this allows to connect valve “open” command
between pins 3 and 5, while “close” command has to be connected to pins
4 and 5.
• Burners selection. Select burn on one of the parameters for alarm selec-
tion. Ex.: setting burn on parameter 45 AL.1 burner function is assigned to
alarm 1.
• Fans selection. Select fa ns on one of the parameters for alarm selection.
Ex.: setting fans on parameter 52 AL.2 fans function is assigned to alarm 2.
Referring to table of parameter 1 (description of the available options for
c.out
) it is possible to check alarm-output match.
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