Which products are affected?
9300 servo inverter, register controller variant V1.0
What happens?
The mark initialisation of the register controller is sporadically not executed.
When does the problem occur?
If the motor has covered a specific absolute distance and the initialisation is started afterwards via input RC-RINIT for the first time, a faulty initialisation is made. The initialisation is always executed when being started before reaching this limit.
The absolute distance depends on the number of incoming pulses at the TP input E4 (cylinder mark). If one register mark pulse per motor revolution has come in, 2^31 increments must have been covered absolutely so that the error can occur. If a gearbox is connected in between, the absolute distance is increased by the gearbox factor. This means that if i = 4, an absolute distance of 2^33 increments is to be covered.
Possible diagnostics?
Missing output RC-RINITOK despite started initialisation and corresponding mark sequence (E5 – E4 – E5).
Short-term measures/recommendations?
The register controller must be initialised with the correct marks directly after mains connection.
Evaluation:
The problem only occurs if a correspondingly large distance has been covered between start of the motor and controller initialisation. The faulty behaviour has been observed in an application which uses the insetter function of the register controller. Inside this machine paper is printed at first on one side and afterwards on the reverse. During the initial printing process the register controller is only operated in the 'Electrical shaft' mode. As a result the corresponding number of increments can be generated. During the second printing process (reverse) the insetter function is activated and the controller is initialised. As a result, the error can occur.
