Eliwell RGF 312 - Page 49

RGF 300
49/53
“SLAVE” CONFIGURATION with control in mA / Vdc
With this configuration, once the
P4, P5
and
P6
reference parameters have been defined, the regulator
carries out speed changes on the basis of the control values which are transmitted by the external controller,
without
needing further calibration.
In the case where you wish to change from
MASTER
to
SLAVE
configuration and therefore reprogram the
type of regulator control, you should check the layout of the configuration jumpers shown and adjust the
value of
P2
which determines
100%
of the fan control.
QUESTION ANSWER HOW TO PROCEED
What should you do to change from
the
MASTER
to
SLAVE
configuration?
only from
MASTER M
and
V
to:
-
SLAVE
M
for 0-20mA
-
SLAVE
V
for 0-10 Vdc
First, check the jumper layout (
fig.
19 > 21 (for M) & fig. 20 > 22 for
V
).
Then calibrate the scale limit value
(100% of the supply to the fan)
when the control value is at
10Vdc
or
20mA
Generate the maximum control
value (
20mA
or
10Vdc
) and,
starting from position ‘
m
’, turn
P2
clockwise until 400 VAC can be
read on the output terminals.
•
Note : for versions X and Y, with NTC sensor, no changes can be made in regard to:
- configuration (from NTC to mA or Vdc control)
- temperature scale (from version X to version Y and viceversa).
In this case too, all calibration operations described can be easily carried out using the
HELP
I
portable work parameter display module that allows the operator to see and set
values with the calibration trimmers even if the rgf300 is being supplied on the workbench