Chapter 4 Running and Commissioning                                                                      IS620P User Manual                                                 
- 96 -
Table 4-6 Speed limit diagram
Without Speed Limit With Speed Limit
Speed
Maximum  
speed
Overspeed may cause 
mechanical damage.
t
Speed
Speed 
limit
The speed 
is limited.
t
When the speed is limited, the DO terminal outputs the signal described in the following table.
Function No.
Function 
Name
Description Setting Remarks
FunOUT.8 V-LT Speed limit
Conrming speed limit in torque control:
Valid: Motor speed limited
Invalid: Motor speed not limited
-
The V-LT function needs to be allocated to a certain DI.
The speed limit source can be internal or external. When the internal speed limit source is 
used (H07-17 = 0), directly set the forward speed limit (H07-19) and reverse speed limit (H07-
20). When H07-17 = 2, the DI allocated with FunIN.36 is used to select H0-19 or H07-20 as 
speed limit. When the external speed limit source is used (H07-17 = 1), the analog setting 
is specied in H07-18, and the corresponding relationship between the speed limit and the 
analog setting is set based on actual requirements. In addition, the externally set speed limit 
must be lower than the internally set speed limit to prevent faults due to improper setting of 
external speed limit.
The speed limit setting modes are set in the following function codes.
Function 
Code
Parameter 
Name
Setting Range Unit Default
Effective 
Time
Property
Control 
Mode
H07 17
Speed limit 
source
0: Internal setting (in 
torque control)
1: External V-LMT 
setting
2: H07-19/H07-20 as 
internal speed limit 
source selected by 
FunIN.36 (V-SEL)
- 0 Immediate
During 
running
T
H07 18 V-LMT selection
1: AI1
2: AI2
- 1 Immediate
During 
running
T
H07 19
Forward speed 
limit/Speed 
limit 1 in torque 
control
0–6000 rpm 3000 Immediate
During 
running
T