OE Max Controls CSDP Plus, User Manual

Page: 112 / 254

114
Speed Limit
Speed limiting methods are internal speed limit and external speed
limit.
• Internal Speed Limit: Limit the speed through the setting of the servo drive
itself.
• External Speed Limit: Limit the speed through the command from the
controller.
Internal Speed Limit
Internal speed limit works as the speed is limited by the value users set
at SEt-67. Therefore, the servo drive operates under the preset limit
even if the controller approves a speed command faster than the set
value of the speed limit.
Please set the speed limit at SEt-67. The setting
range is 1 to 5000 RPM and the default value is
5000.
External Speed Limit
If the user does not use the speed control mode and operates the
system in one of the other control modes, the analog speed command
input from external can be used to limit speed. If the speed control
mode is used, the external speed limit function cannot be used and the
speed can be limited by the internal speed limit.
Speed command gain (SEt-01) determines the relationship between
the analog speed command voltage and the speed command in the
speed control mode. When the speed control mode is not used, the
speed limit is the speed set by the relationship between the speed
command gain and the analog speed command voltage.
Please set the speed command gain at SEt-01. The
setting range is 10 to 6000 RPM/V and the default
value is 500.
The formula to get the external speed limit is as follows.
External speed limit (RPM) = Speed Command Gain (RPM/V) × Input
Voltage (V)
When the speed command gain is 500 RPM/V and the input voltage is
6V, the motor speed is limited at 3000 RPM and when the input voltage
is 10V, the speed limit is 5000 RPM.