PCU12005 datasheet(43/96 Pages) REDLION

43 / 96 page

Print Options (PoPt)

Selecting YES for the print options allows the operator to scroll through

the available options using the PAR button. The up and down arrow keys

toggle between “yes” and “no” with “yes” enabling the option to be printed

when a print function occurs.

INP

Print Input Process Value

SEt

Print Setpoint Value

OPr

Print % Output Power Value

Pbd

Print % Proportional Band Value

INt

Print Integral Time Value

dEr

Print Derivative Time Value

AL1

Print Alarm 1 Value

AL2

Print Alarm 2 Value

dEv

Print Deviation From Setpoint Value

OFP

Print % Output Power Offset Value

r-P

Print Setpoint Ramp Rate Value

Crg

Print Relative Gain Value

Cdb

Print Deadband Value

OSt

Print Output Status

rAt

Print Remote Setpoint Ratio

bIA

Print Remote Setpoint Bias

rSP

Print Remote Setpoint Reading

IN2

Print Second Input Reading

Pb2

Print Proportional Band #2

It2

Print Integral Time #2

dt2

Print Derivative Time #2

SP2

Print Internal Cascade Directed Setpoint

SECOND ANALOG INPUT MODULE (7-2N) (OPTIONAL)

The Second Analog Input can be configured as a Remote Setpoint Input or

as a Secondary Input for Internal Cascade control. As a Remote Setpoint, the

controller can operate as an External Cascade controller, Setpoint Slave

controller and as a Ratio controller. See

Cascade Control, page 56, for an

overview of cascade control.

Operation mode (OPEr)

The Second Analog Input must be configured for either Remote Setpoint

Operation or Internal Cascade Operation (single controller cascade).

rSP

Remote Setpoint

CSCd -

Internal Cascade

Square Root Linearization (root)

In some cases it may be necessary to linearize the Second Analog input by

use of the square root function.

Selection of ‘yES’ results in the square root linearization of the Second

Analog Input(only). Selection of ‘NO’, results in linear scaling. The square

root linearization exhibits a 3% low cut point (17% of scaled reading) to

eliminate reading jitter at low flow rates. The following example illustrates

the scaling of the Second Analog Input with square root linearization.

Example: It is necessary to square root linearize the output of a differential

pressure transmitter to indicate and control flow. The defining equation is

= 278 D p, where D P=0-500PSI, transmitted linearly bya4-20mA

transducer. At full flow rate (

D P = 500 PSI), the flow is 6216 ft3/hr. The

following scaling information is used with the controller:

dPt2

root

yES

dSP1

0 Ft

3/hr

INP1

4.00 mA

dSP2

6216 Ft

3/hr

INP2

20.00 mA

-35-

PCU12005 Datasheet(PDF) 43 Page - Red Lion Controls. Inc

PCU12005 Datasheet(HTML) 43 Page - Red Lion Controls. Inc

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