Siemens F7453 after the treatment measures

1. Cause F7453 occurs

When Epos function is used, a bearing ring encoder will be set. If the numerical feedback of the bearing ring encoder presents problems, F7453 problems will be reported, representing the bearing practice value processing error. When F7453 is generated, it is generally related to the hardware of the encoder, such as loose wiring or incorrect presentation of its own data. Therefore, the first thing is to try to deal with the hardware problems of the encoder side. However, because F7453 faults cannot be shielded, when faults occur, if the encoder hardware problems cannot be dealt with in time, then the equipment will report faults as long as it is in operation. For example, the lifting equipment will stop at the place where the faults occur and cannot be lowered, which will lead to further maintenance difficulties. Then, when F7453 is produced, how to make the equipment run as soon as possible by modifying parameters?

2. F7453 Solution

2.1 Modify the history of azimuth encoder

If, when Epos is used, there is an encoder for both speed ring and azimuth ring, then the current azimuth ring encoder (Encoder2) makes an error. The history of azimuth ring encoder can be adjusted to speed ring encoder (Encoder1). In this way, as long as the speed ring encoder can still operate normally, F7453 problems can be prevented. Equal azimuth encoder (Encoder2) can be used normally, then change back. Parameters are modified as follows:

P10=25, enter the debugging mode of azimuth control

P2502=1, fixed azimuth ring Encoder1 (previously Encoder2)

After correcting the parameters, the equipment can be operated to the repair point using the MDI adjustment form or relative positioning form, and this process will not report F7453 fault. After the real azimuth ring encoder is repaired, modify the parameters again:

P10=25, enter the debugging mode of azimuth control

P2502=2, correct azimuth ring Encoder2

This plugs the previous azimuth encoder into the azimuth ring from scratch.

The advantage of this is that if Encoder2 is a positive encoder, the reference points for Encoder2 previously recorded by the converter are not lost. That is, when the azimuth ring encoder is adjusted from scratch to Encoder2, no positive encoder calibration is required from scratch. It should be noted here that if the mechanical orientation of the encoder is changed before and after maintenance, then the positive orientation code value recorded before the converter will no longer correspond to the previous mechanical orientation, and the reference point should still be returned from scratch.

2.2 Deactivating Epos function

If there is no encoder in the speed ring when Epos function is used, then the Epos function can only be closed, the azimuth ring can be stopped, and then the operation panel or the control panel in the software can be used to manually run the equipment to the maintenance point. Parameters are modified as follows:

P10=11, enter the function module

P108[0].3=0, closed bearing control

P108[0].4=0, closing the fundamental positioning function

P10=0 for the preceding parameter Settings to take effect

After this, the frequency converter will undergo a period of restart process. When the Ready light turns green from scratch, the restart ends. At this time, the frequency converter can be operated in the form of speed through the Hand form of the operation panel or the control panel in the software until the maintenance point.

Doing so will cause the bearing ring parameters to be reset, that is, to open the bearing ring requirements from the beginning for the beginning debugging.