Page 7.11 - 16 COMBIVERT F5-A, -E, -H © KEB, 2012-10
Speed measurement
7.11.8.2 Gear factor / analog setting
The gear factor numerator (Ec.04 and Ec.14, respectively) can be changed via the analog parameter setting
(see chapter 7.15.9).
Example:
The target is to be able to adjust the gear factor for encoder channel 2 between 0.9 and 1.1.
Gear factor denominator is chosen as 1000.
The gear factor numerator must also be settable to between 900 and 1100.
The analog setting shall be done through the Aux-input
=> An.53 Analog parameter setting source = 0: Aux input (ru.53)
The target of the setting is Ec.14 gear factor channel 2 numerator (bus address 100Eh)
=> An.54 Analog parameter setting destination = 100Eh
For an analog value of 0%, one should have gear factor numerator = 1000
=> An.55 Analog parameter setting offset = 1000
For an analog value of 100%, the gear factor numerator should be 1100
=> An.56 Analog parameter setting max. value = 1100
With this setting, a gear factor of 0.9 to 1.1 can be set with an Aux value of -100%...100%.
7.11.8.3 Gear factor / set-programming
The gear factor is generally not set-programmable.
There is a workaround in case the application needs a set-dependent gear factor.
One uses the option of analogously setting the gear factor for this purpose. As the source for the analog para-
meter setting, not an analog input but the motor potentiometer value is selected, which can be specied set-
dependently.
Example:
In set 0, the gear factor should have the value 0.5, in set 1, the value 1, and in set 2, the value 1.5. Gear factor
denominator is chosen as 1000. The gear factor numerator must therefore be: in set 0 = 500, in set 1 = 1000,
and in set 2 = 1500.
The analog setting should be done by motor potentiometer
=> An.53 Analog parameter setting source = 1: Motor potentiometer (ru.37)
The target of the setting is Ec.14 gear factor channel 2 numerator (bus address 100E hex)
=> An.54 Analog parameter setting destination = 100Eh
The value range is symmetrical around 1000 (+/- 500)
=> An.55 Analog parameter setting offset = 1000
The maximum value for the gear factor numerator should be 1500
=> An.56 Analog parameter setting max. value = 1500
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