Siemens MICROMASTER 411 Operating Instructions Manual page 57

Issue 03/01
In order to provide the unit with a Frequency Setpoint the user can either:
1. Turn the control potentiometer.
2. Fit an external potentiometer, or apply an external analog control voltage across
the terminals 6 & 7 AIN.
NOTE
When using the analog input only, the control potentiometer should be turned fully
anti-clockwise to ensure that the control potentiometer is de-activated.
3.4.2 Operation using "Pot = Run" Jumper
With the "Pot = Run" jumper fitted, the control potentiometer provides the ON/OFF
command source.
In order to provide the unit with a Run command the Control Potentiometer must be
turned in a clockwise direction. To switch the unit OFF, turn the Control
Potentiometer fully anti-clockwise (OFF position).
WARNING
If the unit is powered up when the Control Potentiometer is not in the OFF
position, the unit may automatically restart and ramp-up to the frequency setpoint
(Auto-restart function is active by default).
FREQUENCY SETPOINT
Setpoint addition: Control potentiometer and Analog input (P1000 = 27).
In order to provide the unit with a Frequency Setpoint the user can either:
1. Turn the control potentiometer.
2. Fit an external potentiometer, or apply an external analog control voltage
across the terminals 6 and 7 AIN.
NOTES
The 'Internal' frequency setpoint set by the Control Potentiometer is ADDED
to the external frequency setpoint (set by either external potentiometer or
control voltage).
On mains break or fault, the inverter will automatically re-start on power-up
(Auto restart P1210 = 6 – default).
MICROMASTER 411 & COMBIMASTER 411
6SE6400-5CA00-0BP0
Operating Instructions
3 Commissioning
57