4 APPLICABLE FUNCTIONS
4.15 Infinite feed function [G] [WG]
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4.15
Infinite feed function [G] [WG]
Outline
When this function is used in an absolute position detection system, even if the servo motor rotates 32768 rev or more in the
same direction, [AL. 0E3.1 Multi-revolution counter travel distance exceeded warning] will not occur and the home position will
not be erased. Therefore, the current position will be restored after the power is cycled.
When this function is not used, if the servo motor rotates 32768 rev or more in the same direction, [AL. 0E3.1 Multi-revolution
counter travel distance exceeded warning] will occur and the home position will be erased.
• This function is available on servo amplifiers with firmware version B6 or later.
• To use this function, set the unit to "degree" with the servo amplifier.
Setting method
Set the unit to "degree".
When the servo motor rotates 32768 rev or more
The following table shows whether [AL. 0E3.1] will occur, the home position will be erased, and the current position will be
restored when the servo motor rotates 32768 rev or more.
*1 When [Pr. PC29.5 Absolute position counter warning [AL. 0E3.1] selection] is set to "0" (disabled), [AL. 0E3.1] will not occur and the
home position will not be erased. However, if "0" is set while the unit is other than "degree", the current position will not be restored
correctly after the power is cycled. As this will result in an incorrect current position value, set [Pr. PC29.5] to "1" (enabled).
When using the infinite feed function with a controller
To use the infinite feed function with a Mitsubishi Electric controller in the cyclic synchronous mode, set [Pr. PC29.5 [AL. 0E3.1
Absolute position counter warning] selection] to disabled.
For information on the controller, refer to "Absolute Position Control" in the following manual.
MELSEC iQ-R Motion Module User's Manual (Application)
Control mode
Unit for position data
[AL. 0E3.1]
Home position
Current position
Cyclic synchronous mode
pulse
Will be erased
Will not be restored
Profile position mode
degree
Will not occur
Will not be erased
Will be restored
pulse
Will be erased
Will not be restored