ZIEHL-ABEGG ZETADYN 3C, Original Operating Instructions, Page: 156 / 204

Options for calibrating an absolute value encoder
The frequency converter ZETADYN 3C has two different methods of calibrating the absolute value
encoder:
•
load-free
calibration of theabsolutevalue encoder
•
calibration of the absolute value encoder with
brake closed
General conditions required for an encoder alignment without load:
• The installation and motor data must be con
fi
gured
• Load-free operation (ropes must be removed from the traction sheave)
• Brake monitoring must be activated corresponding to the number and type of brakes in use (
Monitoring/BR
menu)
•
Contactor monitoring must be con
fi
gured according to the type of contact for monitoring (
Monitor-
ing/CO
menu)
•
General conditions required for an encoder alignment closed brake:
• The installation and motor data must be con
fi
gured
• It must be ensured that the brake does not open during the calibration (disconnect brake)
• Brake monitoring must be activated corresponding to the number and type of brakes in use (
Monitoring/BR
menu)
•
Contactor monitoring must be con
fi
gured according to the type of contact for monitoring (
Monitor-
ing/CO
menu)
15.2.1 Load-free alignment SSI-Encoder
When aligning the SSI encoder, the frequency inverter supplies the motor with direct current. During
this, the rotor jumps to the middle of the nearest magnetic poles. In this rotor position, the absolute
rotary encoder must be manually aligned to its zero point. To ease installation, it is recommended to
connect the encoder to the frequency inverter before installation and to align the offset value "0"
(value in
Encoder-adjust./ENC_POS
menu). After that, mount the encoder into position - shifting as
little as possible
–
into the position in which the terminal screw is easily accessible.
Information
The calibration should always be done twice. Any inaccuracy in the 1st calibration is detected by the
2nd calibration and can be corrected.
If the encoder terminal screw is not accessible in the "ENC_POS = 0" position, the encoder can be
adjusted to the value of any pole pair (see table).
Pole pair ZAtop drive
SM 160 / SM200 / SM225 / SM250
ZAsyn drive
SM700 / SM860
1 0 0
2 819 546
3 1638 1092
4 2458 1638
5 3277 2185
6 4096 2731
7 4915 3277
8 5734 3823
9 6554 4369
10 7373 4915
11 - 5461
12 - 6007
13 - 6554
14 - 7100
15 - 7646
Original operating instructions
ZETADYN 3C
Special functions
R-TBA08_03-GB 1619 Part.-No. 00163322-GB
156/204