SSD 605C Product Manual - page 86

6-20  

Programming Your Application

605C Frequency Inverter

CURRENT LIMIT

This function block allows the user to set

the maximum level of line current or motor

load at which the Inverter is intended to

operate. If the measured level of current or

load exceeds the MOTOR I LIMIT value,

the Inverter attempts to shed motoring

current or load by reducing its output

frequency (reduce motor speed). Under

extreme conditions, the Inverter frequency can be reduced to zero.

If the measured level of current or load exceeds the REGEN I LIMIT, the Inverter attempts to

shed regenerating current or load by increasing its output frequency. Under extreme conditions,

the Inverter frequency can be increased up to the maximum speed setting. You can disable the

action of REGEN I LIMIT.

MMI Menu Map

1 SETUP PARAMETERS

2 FUNCTION BLOCKS

3 MOTOR CONTROL

4 CURRENT LIMIT

MOTOR I LIMIT

REGEN I LIMIT

FEEDBACK SOURCE

REGEN LIM ENABLE

CURRENT LIMITING

CURRENT LIMIT

LIMITING [370] – FALSE

150.00 % – [365] MOTOR I LIMIT

–

-150.00 % – [623] REGEN I LIMIT

–

CURRENT – [366] FEEDBACK SOURCE –

TRUE – [686] REGEN LIM ENABLE –

Parameter Descriptions

MOTOR I LIMIT

Range: 0.00 to 150.00 %

This parameter sets the level of motor current, as a % of FULL LOAD CALIB (refer to the

CURRENT FEEDBACK function block) at which the Inverter begins to reduce the Inverter

output frequency.

REGEN I LIMIT

Range: -150.00 to 0.00 %

This parameter sets the level of motor current, as a % of FULL LOAD CALIB (refer to the

CURRENT FEEDBACK function block) at which the Inverter begins to increase the Inverter

output frequency.

FEEDBACK SOURCE

Range: Enumerated - see below

This parameter determines the feedback source (measured value) for the current limit. The

feedback source determines the mode of current limit operation.

Enumerated Value : Feedback Source

0 : CURRENT

1 : LOAD

REGEN LIM ENABLE

Range: FALSE / TRUE

This parameter enables or disables REGEN I LIMIT.

LIMITING

Range: FALSE / TRUE

This diagnostic indicates whether the current limit is active (altering Inverter output frequency)

or inactive.