Functions - gefran 400 Installation And Operation Manual

This 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
Indication of output states
OUT 1 (Main); OUT 2 (AL1); OUT 3 (AL2)
Deviation indicator
On if deviation is <0.25% f.s.
Deviation indicator
On if deviation is between 0.25 and 5% f.s.
Flashes if deviation is >5% f.s.
Automatic/Manual setting selection
In Manual, corresponds to flashing of deviation
indicator
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.
8
3 • FUNCTIONS
"Raise" and "Lower" keys:
LED flashes during software shutdown
Display
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)
LED on during Self-tuning or Softstart;
LED flashes during Auto-tuning
Function key
Gives access to different configuration stages ••
Confirms any parameter changes
81503D_MHW_400-401_12-2010_ENG