Eurotherm 3116 PID User's Guide download pdf (Page 38)

3100/3200 Series

36 Part No HA028651 Issue 3.0 Mar-06

Note 1

Home Display Configuration

The upper display always shows PV, the lower display is

configurable.

Std In automatic control the lower display shows

setpoint. In manual mode output power is shown.

OP Output power is shown in both automatic and manual

modes.

Timer time remaining

ELAP

Timer elapsed time.

AL1

First configured alarm setpoint

CT current

CLr

Blank display

Tmr

The display shows setpoint while the timer is not

running and time remaining when the timer is active.

t.sp The display shows target setpoint so that the target for

a ramp may be viewed rather than the current working

setpoint

no.pv The upper display is blank

Stby The upper display blanks when the controller is in

standby mode.

Note 2

Edit keys locked

. Parameters cannot be changed but

viewed only. However, it is possible to run, hold and reset

timer and acknowledge alarms.

Note 3

Mode key locked. Timer run, hold, reset and Auto/Manual

cannot be operated from the Mode key.

The following sections in this handbook describe the

parameters associated with each subject. The general format

of these sections is a description of the subject, followed by

the table of all parameters to be found in the list, followed

by an example of how to configure or set up parameters.

Note 4

Meter Configuration

HEAT

The meter shows a representation of the heat output

being applied by the control loop to the load. It is scaled

between 0 and 100% full scale deflection.

Op The meter displays the current Control Output setting

scaled between the low and high output power limits. In a

motorised valve controller (option VC or VP) this is the

‘inferred’ position of the valve

COOL The meter shows a representation of the cool output

being applied by the control loop to the load. It is scaled

between 0 and 100% full scale deflection.

C.OP The meter displays the current output power setting

scaled between -100 and 100%, so that a value of zero is

centred in the display. This indicates whether the controller

is currently applying heating or cooling.

w.sp The meter shows a representation of the current

working setpoint, scaled between the setpoint high and low

limits. It may be used to indicate at what point in the

setpoint range the instrument is currently operating.

PV The meter displays the current Process Variable

scaled between the range high and low values. Provides an

indication of the current temperature relative to the range of

a process.

Err The meter displays the process error (i.e. the

difference between the current temperature and the setpoint),

scaled between +10 degrees and -10 degrees. This provides

a visual indication of whether the process is close to

setpoint.

Amps The meter shows a representation of the

instantaneous current through a load monitored using a

current transformer, scaled between 0 Amps and the

configured range of the Current Transformer. It may be

used to visually indicate the health of the heating elements,

since in normal use it will tend to flick from a low reading

when the heating is off, to a higher reading when the heating

is on. If the needle does not return to a low value, the SSR

may be conducting regardless of the logic signal driving it.

If the needle does not reach the expected level it is likely

that one or more of the heater elements has burned out.

Lcur The meter displays a representation of the On State

Current in a load monitored by the current transformer

option. In normal operation it will tend to remain static and

provides an alternative means of monitoring the health of a

heating element to the 'Amps' option.

Note 5

Feature Passcodes These parameters were added in

controllers with software versions 2.09 (PID controller) and

2.29 (VP controller) and above. They allow the controller

to be field upgraded with additional chargeable features. To

upgrade, contact Eurotherm and provide the existing number

codes. ‘Pass2’ is read only and is required to provide

Eurotherm with the current instrument features. You will be

given a numeric code to enter as the new ‘PassC’ parameter.

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Eurotherm 3116 PID User's Guide Page 38

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