<p>We have installed a UDC 2300 for controlling a Single I/P - 2 O/P system. The I/P is a 4-20 ma signal varying for a value between PV 1.00 to 2.00.

<p>Set Point is a value in the range of the I/P value (1.00 to 2.00).

<p>The O/Ps are 4-20 mA signals following the characteistics.

<p>When PV>SP o/p1 should be increased (4 - 20 mA signal in PID Control) while o/p2 should remain 4mA. <br>
When PV<SP o/p2 should be increased (4 - 20 mA signal in PID Control) while o/p1 should remain 4mA.

<p>We lost the initial configuration parameters in a reset. Based on the documentation we have fed in the parameters as follows.
<pre>
UDC2300 Set Up

Timer Timer Disabled

Tuning PB 5.00
Rate T 2.00
I min 3.00
PB 2 9.96
Rate2 T 2.06
I2 min 4.83
Secur 0.00
Lock None
Automatic Enable
A Tune Enable
RnHld Dis
SP-Sel Dis

SP Ramp SP Ramp Dis
SP Rate Dis

Atune Fuzzy Enable
Tune Tune
At Err None

Algor CtrAlg PID A
OutAlg CURD
4-20RG 100.00

Input1 Dec 88.88
Units None
In1typ 20-Apr
XMITR1 Linear
In1Hi 2.00
In1Lo 1.00
Ratio1 1.00
Bias1 0.00
Filtr1 5.00
Brnout Up
Freq 5.00
Lang Engl

Control LSP's One
SPTrk None
Pwr Up Man
SP Hi 2.00
SP Lo 1.00
Action Dir
Out Hi 100.00
Out Lo 0.00
Dband 2.00
FailSF 0.00
FSMode NOL
PB or GN PB
MinRpm Min

Option AuxOut Out
0Pct 2.00
100Pct 1.00

Com Com Dis

Alarms A1S1VA 1.91
A1S1TY Proc
A1S2TY None
A2S1TY None
A1S1HL High
ALHYST 0.10
ALARM1 NO
BLOCK Dis
</pre>
<p>Could anybody who is familiar with this Controller confirm whether the settings are correct for the system or please suggest alternatives.

<p>Best Regards

<p>Parag Bhadra<br>
Metso Minerals<br>
6th Floor DLF Gateway Towers<br>
DLF City Phase III<br>
Gurgaon<br>
Haryana

 

Pharag bhadra,

you cannot have a constant value for your second o/p. because as you can see it can be a retransmission of i/p1 or i/p2 or sp or pv or deviation or local sp or output.
since you have selected output as the aux output, you will be getting only the replication of first control o/p.

satheesh.s