Device utilisation C0056, functional description

Question:

What is the significance of device utilisation C0056?

Answer:

Device utilisation indicates a value for utilisation of the drive as a guide. The load variable of a drive is the torque which is then standardized to the rated torque.

Since in a V/f characteristic control system the torque is not determined, the active current in relation to rated active current is stated in %. In the case of vector control and torque control the present torque is indicated in relation to rated torque.

The accuracy of the indication for device utilisation in the case of V/f characteristic control is 30 % and in the case of vector control it is 20 %.

Summary:

• V/f characteristic control (C0014 = 0, 1, 2, 3)
• C0056 = [Imotor * cos(phi)] / [IN * cos(phiN)] ~ M / MN
• Vector and torque control (C0014 = 4, 5)
• C0056 = M / MN

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