1068 HEIDENHAIN Technical Manual MANUALplus 620
Before determining the field angle (code number 94655 not entered yet) the
inverter must be in the following mode of operation:
Green "READY" LED on
Red "SH1" LED off
Red "SH2" LED on (drive controller not ready, brakes closed)
As soon as the drive enable comes from the PLC, the Finding field angle
message appears, otherwise 8B40 No drive release appears.
The motor moves and the field angle is determined. Limit switches are not
taken into account.
In order to avoid the possible error message resulting from standstill
monitoring, enter an appropriately high value in MP_checkPosStandstill.
Switch on the MANUALplus 620.
Do not acknowledge the Power interrupted message. Enter the code
number 94655.
The PLC must
• switch the drive on/off
• release and lock the brakes
The motor moves back and forth. The field angle is determined for the
reference mark or datum, and is stored automatically. The Finding field
angle progress bar appears. Then one of the following messages appears:
8630 Field orient. successful indicates that the field angle was successfully
determined and stored in MP_motPhiRef.
8B10 Wrong traverse direction indicates that the rotational direction of the
electrical field does not match the counting direction of the encoder.
Error fix: Change the entry in the machine parameter MP_motDir.
8B20 Error field orientation indicates that no usable measuring results
could be determined. One common reason for this is that the parameters
for the encoder are incorrect. A further cause could be that the motor is
moving against a resistance (e.g. brake is still active, bellows, limit stop) or
that the mechanics are too stiff.
The MANUALplus 620 carries out a reset. If the message 8630 Field orient.
successful appears, then the field angle was associated and is available.
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