Basic Operation; Operation - External Analogue Control - Siemens COMBIMASTER CM12 Operating Instructions Manual

R314 can be accessed by removing the
right-hand gland hole cover (see Fig. 2 & 3).
Analogue input type is selected by jumpers
JP300 and JP301. JP300 closed selects
current input, JP301 closed (default) selects
voltage input. These jumpers can only be
accessed when the cover is removed (see
Fig. 2 & 3).

Basic Operation

There are two basic modes of operation for
the inverter.
1 Using the internal potentiometer only:
a For forward rotation, ensure that a link
is fitted between DIN1 (pin 5) and
P10+ (pin 1) on PL800/PL700 (see
Fig. 4). For reverse rotation, connect
the link to DIN2 (pin 6) instead of
DIN1.
b Apply mains power. The green and
yellow LEDs will illuminate to show
that power is applied. Turn
potentiometer R314 fully counter-
clockwise, otherwise the
COMBIMASTER cannot be started.
c Turn the potentiometer clockwise until
the yellow LED extinguishes. This
indicates that power is now applied to
the motor. Continue turning clockwise
to increase the speed of the motor.
d Turn the potentiometer counter-
clockwise to reduce the speed of the
motor. Turning the potentiometer fully
counter-clockwise causes the motor to
slow to a complete stop. Check that
both LEDs are illuminated (STANDBY
mode).

Operation - External Analogue Control

1 Connect a 4.7 kΩ potentiometer to the
control terminals as shown in Fig. 4 or
apply a 0 - 10 V signal between pin 2
(0V) and pin 3 (AIN+). In both cases,
position jumper JP304 to connect 0V to
AIN-.
2 Ensure that a link is fitted between pin 5
(DIN1) and pin 1 (P10+).
3 Check that voltage input is selected by
ensuring that the jumper is fitted to
JP301.
4 Refit the cover, tighten the cover screws
to the correct torque and then apply
mains power to the inverter.
© Siemens plc 1999 | G85139-H1731-U400-D2
If the motor is run unloaded (e.g. for test
purposes) and vibration or trip conditions
occur, change P077 from 0 to 3 (requires
OPm2).
2 Using a combination of the internal
potentiometer and a run/stop switch:
a Connect a run/stop switch between
DIN1 (pin 5) and P10+ (pin 1) on
PL800 (see Fig. 4) if forward rotation
is required. If reverse rotation is
required instead, connect the switch to
DIN2 (pin 6) instead of DIN1.
IMPORTANT: Remove the link, if fitted,
between pins 5 and 1 before the run/stop
switch is fitted.
b Apply mains power. The green and
yellow LEDs will illuminate to show
that power is applied.
c Set the external run/stop switch to
ON.
d Turn potentiometer R314 clockwise to
set the required motor speed.
e Stop the motor by setting the external
on/off switch to OFF. When the switch
is set to ON again, it will run at the
speed previously set using the
potentiometer.
5 Turn the external potentiometer (or
adjust the analogue control voltage) until
the desired frequency is achieved. The
unit will not switch on until a minimum of
2 V has been applied.
Note: The frequency set by the external
voltage is added to the frequency set by the
internal potentiometer.
As with Basic Operation (2), a run/stop
switch can be used to start and stop the
motor, or the direction of rotation can be
changed by connecting the link to DIN2
instead of DIN1.
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