SSD 605C Product Manual - page 107

Programming Your Application 

6-41

605C Frequency Inverter

MINIMUM SPEED

The minimum speed block is used to

determine how the Inverter will follow a

reference. There are two modes

1.  Proportional : minimum limit

2.  Linear : between min and max.

Functional Description

There are two operating modes for the MINIMUM SPEED block:

Proportional with Minimum

In this mode the MINIMUM SPEED block behaves like a

simple clamp. The minimum value has the valid range

-100% to 100% and the output is always greater than or

equal to the minimum value.

Linear

In this mode the MINIMUM SPEED block

first clamps the input to zero then rescales

the input such that the output goes linearly

between minimum and 100% for an input

that goes from 0 to 100%.

Note the constraints:-

min >= 0

input >= 0

max = 100%

MMI Menu Map

1 SETUP PARAMETERS

2 FUNCTION BLOCKS

3 SETPOINT FUNCS

4 MINIMUM SPEED

MIN SPEED INPUT

MIN SPEED

MIN SPEED MODE

MIN SPEED OUTPUT

MINIMUM SPEED

OUTPUT [335] – 0.00 %

0.00 % – [336] INPUT

–

-100.00 % – [337] MINIMUM

–

PROP. W/MIN. – [338] MODE

–

Parameter Descriptions

INPUT

Range: -300.00 to 300.00 %

The input for this block.

MINIMUM

Range: -100.00 to 100.00 %

This parameter determines the minimum output value from this block

MODE

Range: Enumerated - see below

This parameter represents the operating mode of the block. There are two modes:

Enumerated Value : Operating Mode

0 : PROP. W/MIN.

1 : LINEAR

OUTPUT

Range: xxx.xx %

The output is determined by the MODE selected, see below.

Min

0

100%

100

-100

input

output

100

Min

0

100%

output

input

200%

max = 300.00% – (2 x min)