4 Quick-start guide
Encoder difference monitoring: This option is useful if the encoder used for determining the
actual position is a different encoder than the one that is used for determining the
commutation position/actual speed. The parameter Actual position value - commutation
position can be used to define an interval in which both positions may differ from one
another. In the event of a stronger difference, an error will be issued.
Torque limitation by: The maximum torque (or the maximum current) of the application can
be limited by
l The setting of the motor currents: Click the button Maximum current to access the
menu for configuring the motor data (see section 4.4.4 Configuration of the motor
data on page 47).
l An explicit setpoint limitation. Click the button Setpoint selection to access the
corresponding menu (see section 5.2 Operating modes on page 65).
Speed limitation
Speed limit, positive: Here, you can enter the maximum positive speed of your
application. However, the effective speed limit depends on the settings for the override
and thread speed (set-up speed) (see "Set-up mode").
Speed limit, negative: Here, you can enter the maximum negative speed of your
application. However, the effective speed limit depends on the settings for the override
and thread speed (set-up speed) (see "Set-up mode").
Set-up mode: Here, you can specify a speed limitation in per cent. It refers to the lower
speed limit (see the right-hand box in the menu). In Speed control mode, the set speed
value is limited to this set-up speed value. In the positioning mode, the set-up mode takes
effect during the position control process. In this case, the profile speed is reduced to such
an extent that an adjustment reserve (5%) remains for the speed controller.
Example:
Positive speed limit: 4900 U/min
Negative speed limit: -4000 U/min
Set-up speed: 10 %
Speed control mode:
Maximum speed in set-up mode
= absolute value (-4000) rpm * 10%
= 400 rpm
Positioning mode:
Maximum profile speed of a positioning run in set-up mode
= (4000 rpm * 10%) – 5% (adjustment reserve)
= 400 rpm * 0.95
= 380 rpm
The set-up mode must be activated via a digital input. See section 7.7 Digital inputs on
page 168.
Product manual BL 4000-C Page 50 of 298
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