4–36

Using Intelligent Input Terminals

The figure below shows the operation during an overload restriction event. The overload restriction level is set by B022 and B025. The overload restriction constant is the time to decelerate to 0Hz from maximum frequency. When this function operates, the acceleration time will be longer than the normal acceleration time.

Output

frequency

B022 / B025

B022 / B025

Overload

restriction level

Deceleration rate

at overload restriction

Maximum A004

frequency F001

Target frequency

 

 

 

 

 

t

 

 

Deceleration rate at overload restriction

 

B023 / B026

NOTE: The Overload Advance Notice function for intelligent outputs is related to Overload

Restriction operation, discussed in “Overload Advance Notice Signal” on page 4–46.

Operations and Monitoring