11
Troubleshooting
Operating instructions HERMA 400
142/154 3.28 US (130519)
– The web transport required more torque as could be delivered by the drive. As the case may be,
reduce the brake force of the web brake.
– An impulsive load occured during web transport. The pendulum hit the label web or ran against a
mechanical stop. The loop unwinder did not (fully) create a loop.
With high dispensing speeds (> 90 meters/min) it may occur that the first labeling cycle causes this
message to appear after switching on the applictor.
The reason is that the exact rotor position is not known after switching on the applicator. In such case
manually dispense a label first.
Please turn to our Technical Service or to your HERMA partner if this malfunction occurs repeatedly.
As the case may be, the drive unit may need to be replaced.
11.2.72 SM921 Drive failure
This message appears if during initialization transistors could not be addressed. Please turn to our
Technical Service or to your HERMA partner if this malfunction occurs repeatedly.
11.2.73 SM922 Drive failure
This message appears if the reference voltage is beyond specification. Please turn to our Technical
Service or to your HERMA partner if this malfunction occurs repeatedly.
11.2.74 SM923 Drive failure
This message appears if there is a high discrepancy between nominal and current position. May
indicate an overload. Please turn to our Technical Service or to your HERMA partner if this malfunction
occurs repeatedly.
11.2.75 SM924 Drive failure Overload
This message appears if there is a drive failure with following switching off the PWM amplifier. Please
turn to our Technical Service or to your HERMA partner if this malfunction occurs repeatedly.
11.2.76 SM925 CAN communication disturbed
This message appears if there is a failure in the connection to the CAN I/O board. Please turn to our
Technical Service or to your HERMA partner if this malfunction occurs repeatedly.
11.2.77 SM926 Drive failure: Overload (vMax exceeded!)
This message only appears during decelaration of a labeling cycle. The braking current exceeds the
maximum admissable value on trying to reach the calculated stop delay distance.
This will occur only if, e.g. when using a master encoder, the maximum speed entered is much lower
than the actual speed when decelerating to the stop.
In this case vMax must be increased if the maximum albelling speed was exceeded and such caused
an overload in the drivce. Check parameter 112 „Speed Maximum value (10V)“ (PWL3 required).
Please turn to our Technical Service or to your HERMA partner if this malfunction occurs repeatedly.
As the case may be, the drive unit may need to be replaced.
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