4.7 Other Output Signals
4-53
4
Op
er
at
io
n
(1) Signals Output during Servomotor Speed Limit
The following signal is output when the motor speed reaches the limit speed.
Note: Use parameter Pn50F.1 to allocate the /VLT signal for use. For details, refer to
3.4.2 Output Signal Allocations
.
(2) Speed Limit Setting
Select the speed limit mode with Pn002.1.
Internal Speed Limit Function
If the internal speed limit function is selected in Pn002.1, set the limit of the maximum speed of the servomo-
tor in Pn407. The limit of the speed in Pn408.1 can be either the maximum speed of the servomotor or the
overspeed alarm detection speed. Select the overspeed alarm detection speed to limit the speed to the maxi-
mum speed of the servomotor or the equivalent.
Note: The servomotor’s maximum speed or the overspeed alarm detection speed will be used when the setting in this
parameter exceeds the maximum speed of the servomotor used.
External Speed Limit Function
If the external speed limit function is selected in Pn002.1, the motor speed is controlled by the speed limit
value (VLIM). For details, refer to the
Σ
-V Series/DC Power Input
Σ
-V Series/
Σ
-V Series for Large-Capacity
Models User’s Manual MECHATROLINK-II Commands
(Manual No.: SIEP S800000 54).
Type
Signal
Name
Connector
Pin Number
Setting
Meaning
Output
/VLT
Must be allocated
ON (closed)
Servomotor speed limit being applied.
OFF (open)
Servomotor speed limit not being applied.
Parameter
Meaning
When
Enabled
Classification
Pn002
n.
0
[Factory setting]
VLIM (the speed limit value during torque control) is
not available. Uses the value set in Pn407 as the speed
limit (internal speed limit function).
After restart
Setup
n.
1
VLIM operates as the speed limit value (external speed
limit function).
Pn407
Speed Limit During Torque Control
Classification
Setting Range
Setting Unit
Factory Setting
When Enabled
0 to 10000
1 min
-1
10000
Immediately
Setup
Torque
Parameter
Meaning
When
Enabled
Classification
Pn408
n.
0
[Factory setting]
Uses the smaller value of the maximum motor speed
and the value of Pn407 as the speed limit value.
After restart
Setup
n.
1
Uses the smaller value of the overspeed alarm detec-
tion speed and the value of Pn407 as speed limit value.