J_Gear

General

Functional Description

The parameter represents the input of the gear box moment of inertia at the motor shaft (gear box input side).

 

 

This parameter affects the feed forward and the internal amplifying factors of the speed controller and influences the calculation of the maximum acceleration MaxAcc.

 (See also calculation of adjustable values for the J_Load parameter).

NOTE: The parameter value is transferred from the master to the slave via the parameter channel of the Sercos at every access. Typically, this takes about 10 ms. However, times up to 1 s may be realized if large amounts of data are transferred on the parameter channel.

The following graphic indicates the dependency with other object parameters for rotary drives:

 

 

Yellow parameters are input parameters, whose values are taken into account by the Sercos phase up. Green parameters are input parameters, whose values are taken into account immediately. Gray parameters are output parameters. Thick arrows show that a parameter makes an impact on another parameter immediately by the input. Thin arrows show that a parameter does not have an impact until the next Sercos phase up or when the dependent parameter is entered. The arrow indicates the effective direction of the dependency.

Example:

Entering J_Load has a direct impact on the parameter MaxAcc. A revision of MaxAcc only has an impact on ControllerStopDec if,

oa Sercos phase up takes place or

othe parameter ControllerStopDec is modified.