Commissioning
Setting of the feedback system for position and speed control
Absolute value encoder as position encoder and resolver as speed encoder
117
EDBCSXS064 EN 4.0
6.8.5
Absolute value encoder as position encoder and resolver as speed encoder
Danger!
Valid when using an operating software up to and including V7.0:
When absolute value encoders are used, uncontrolled movements of the drive
are possible!
If an
absolute value encoder
is disconnected from the axis module during
operation, the fault OH3−TRIP occurs. If the
absolute value encoder
now is
connected to X8 again and a TRIP−RESET is carried out, the drive may start up in
an uncontrolled manner with a high speed and a high torque. A SD8−TRIP will
not occur, as would be expected.
Possible consequences:
ƒ
Death or severe injuries
ƒ
Destruction or damage of the machine/drive
Protective measures:
ƒ
If a fault (trip) occurs during commissioning when an
absolute value
encoder
is used, check the history buffer C0168. If an Sd8−TRIP is at the
second or third place, a reinitialisation is absolutely necessary. For this
purpose, switch off and on again the 24−V supply of the control electronics.
An absolute value encoder Hiperface® interface connected to X8 can be configured as a
position encoder with a resolver connected to X7 being used as a speed encoder.
Observe the following setting sequence:
1. Select absolute value encoder as position encoder.
– Single−turn encoder: C0490 = 3
– Multi−turn encoder: C0490 = 4
2. Select resolver as speed encoder.
– C0495 = 0
3. Select an absolute value encoder.
– Single−turn encoder: C0419 = 307 ... 311
– Multi−turn encoder: C0419 = 407 ... 411
The encoder data (C0420, C0421, C0427) is set automatically in accordance with the
selection.
