User manual

81505_MHW_450_03-2013_ENG

3 • FUNCTIONS

his section describes the use and functions of the displays, lighted indicators and buttons making up the

controller operator interface.

It therefore contains essential information for correct programming and configuration of the controllers.

Operator interface

“Raise” and “Lower” keys”

These keys are used for any operation that requires a numerical parameter to be raised or lowered. ••The speed of change is

proportionaltothetimethekeyispressed.••Theoperationisnotcyclic:oncethemaximum(minimum)limitisreached,therewillbeno

further increase (decrease) of the value, even if the key remains pressed.

Automatic/Manual setting selection

On only when PV display shows process variable

PV Display: Indication of process variable

Error Indication: LO, HI, Sbr, Err

LO= the value of process variable is < di LO_S

HI= the value of process variable is > di HI_S

Sbr= faulty sensor or input values higher than max.

limits

Err= PT100 third wire opened for PT100, PTC or

input values lower than min. limits (i.e.: TC wrong

connection)

Funktion key

Gives access to different configuration stages ••

Confirms any parameter changes

Indication of output states

OUT 1 (Main); OUT 2 (AL)

SV Display: displays control Setpoint

Function displays

Display instrument function mode

L1 MAN/AUTO = OFF (automatic control)

ON (manual control)

L2 AUTO-TUNING = ON (auto-tuning ON)

L3 SELF-TUNING/

SOFT-START= ON (during self-tuning or

soft-start).

450

ouT1

ouT2

8888

450