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What is the cause and method of rectifying Err 16.0 overheat protection?

ID:
40435
Issued:
Apr 3rd, 2017
Updated:
Jun 1st, 2017

What is the cause and method of rectifying Err 16.0 overheat protection?

ANSWER

■ Cause
The servo-amplifier calculates the load rate according to the effective value of the output torque.
If this value exceeds the overload level (initial set value = 115%) set in Pr5.12, this protection is generated.
■ Action
Check the load rate from “d15.oL” monitor mode on the amplifier front panel or “Load rate” on the Panaterm monitor.
If it is necessary to know a partial load rate during motion, measure the torque waveform using the Panaterm waveform graphic and specify a section using the cursor. The calculated effective value of torque between the cursor will be displayed.
(1) If overload protection is generated by motor vibration,
[1] Lower the first and second speed loop gain. If effective, the resonance is generated by machine resonance. → Readjust the gain or reduce the speed loop gain.
[2] Inertia ratio is set with no load → Return the inertia ratio Pr0.04 to the initial setting.
[3] Check wiring error of U, V, and W wires. (Start with amplifier side)
[4] Reduce the first and second position loop gain → If effective → Position gain is excessive compared with speed gain. → Reduce position gain or increase speed gain and increase inertia ratio.
*If the gain change is ineffective, only the first is effective. Refer to the parameters and change the one that is effective.
(2) If overload protection is generated without motor movement
[1] Check contact failure/breakage of motor power wires. (If you are using a multiple axis, wiring may be cross-connected)
[2] Check if the electromagnetic brake is released → Supply +24 V DC to release the brake. In the servo off state, check if it can be rotated. If it will not rotate, check the 24 V power and wiring.
[3] Rotate the motor in the servo off state. If it is stiff and will not move, check to see if the mechanism or speed reducer is jammed.
(3) Overload protection occurs while the motor is in motion
While checking the load rate using the amplifier or Panaterm monitor
[1] If the axis is horizontal, increase the stopping time. If this works, increase the motor/amplifier output to correct the insufficient capacity.
As a temporary measure, increase acceleration/deceleration time and stopping time.
[2] If the axis is vertical, check the torque during climbing and stopping. If the torque is 115% or more, increase the output of the motor/amplifier to counteract the insufficient capacity.
[3] Check if the electromagnetic brake is released → Supply +24 V DC to release the brake. In the servo off state, check if it can be rotated by hand. If it will not rotate, check 24 V power and wiring.
[4] If the previous series motor is replaced, check the effective value of torque by using the waveform graphic. Note that older models sometimes produce inaccurate calculations of load rate.

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