IS620P User Manual                                                                      Chapter 4 Running and Commissioning
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3. Speed reference limit
The speed references in the speed control mode can be limited.
 
•
H06-07 species the limit of speed references. The forward or reverse speed references 
must not exceed the limit. If speed references exceed the limit value, the servo drive 
outputs the limit value.
 
•
H06-08 species the forward speed threshold. If the speed reference of the forward 
direction exceeds the value, the servo drive outputs the value.
 
•
H06-09 species the reverse speed threshold. If the speed reference of the reverse 
direction exceeds the value, the servo drive outputs the value.
 
•
The maximum motor speed changes with the actual motor parameters.
When the speed is restricted, the smallest value of H06-07, H06-08, and H06-09 takes effect, as 
shown in the following gure, where the value of H06-09 is larger than the value of H06-07, the 
actual forward speed limit is the value of H06-08, and the reverse speed limit is the value of H06-07.
Figure 4-11 Speed reference limit
Forward speed threshold (H06-08)
Maximum speed threshold (H06-07)
Maximum motor speed
Maximum motor speed
Maximum speed threshold (H06-07)
Speed reference
Reverse speed threshold (H06-09)
Actual speed 
amplitude
By default, the limit does not exceed the maximum motor speed.
The actual motor speed amplitude meets the following requirements:
 
•
|Amplitude of forward speed| ≤ min {maximum motor speed, H06-07, H06-08}
 
•
|Amplitude of reverse speed| ≤ min {maximum motor speed, H06-07, H06-09}