Siemens COMBIMASTER 411 Getting Started Manual page 12

In the following table the behaviour of the Jumpers for ramp times are
explained:
Table 3
Status before action(s)
• No jumper fitted
• Ramp times have
arbitrary setting
• At least 1 jumper is
fitted
• Ramp times have
arbitrary setting
• At least 1 jumper is
fitted
• Ramp times have
arbitrary setting
2.2.2 Control Circuit Jumpers
Control Jumpers are provided for the following functions (fit the
jumpers to enable the function). Jumpers can only be accessed when
the cover is removed:
Pot = Run: Enables the control potentiometer as the Command
Source (auto restart is enabled).
24 V Analog input: to change analog input range from 0-10V to 0-
24V.
DC Brake: to change Stop function from OFF1 to DC Brake.
Fan/Pump: M~n2: to change V/f curve from Linear to Quadratic
curve.
60Hz operation: to change motor default settings from 50Hz to 60
Hz.
Figure 9
WARNING
With the DC Brake Jumper set, when stopping the inverter, DC
Braking is applied for a period proportional to the Ramp Down Time.
Frequent use of long periods of DC injection braking can cause the
motor and inverter to overheat.
12
MICROMASTER 411 & COMBIMASTER 411
Getting Started Guide – 07/05
Ramp Time Jumpers
Action(s)
• Power down
• Fit jumper(s)
• Power up
• Cycle power
• Power down
• Remove
jumper(s)
• Power up
Control Circuit Jumpers
Reaction(s) of the inverter
• Inverter uses the ramp times
defined by the current
jumper setting
• Inverter uses the ramp times
defined by the current
jumper setting
• Inverter uses the ramp times
that were used before
removing the jumper(s)