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Have a TM-55 Integrating Actuator with a SPC controller of woodword. The commissioning, the controller requires me to input a parameter called " Actuator Null Current", and it shall set equal to the actual null current of the actuator, otherwise, a steady errors will exist.
According to the SPC: At a certain input current of an integrating actuator, called the null current, its position does not change.
I went through the TM-55 manual, there is a parameter shows 160 mA null, and also said the null current can be changed.
First of all, what is null current?
Second, if the 160 mA null is the factory set null current of the actuator?
Third, why reaching null current, the position of the actuator will not change any more?
Last, the SPC controller need this parameter be set?
Thanks a lot
According to the SPC: At a certain input current of an integrating actuator, called the null current, its position does not change.
I went through the TM-55 manual, there is a parameter shows 160 mA null, and also said the null current can be changed.
First of all, what is null current?
Second, if the 160 mA null is the factory set null current of the actuator?
Third, why reaching null current, the position of the actuator will not change any more?
Last, the SPC controller need this parameter be set?
Thanks a lot