Lenze ECSCPxxx - Manual (Page 145)

Commissioning
Setting of the feedback system for position and speed control
Absolute value encoder as position and speed encoder
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145 EDBCSXP064 EN 8.0
6.9.5 Absolute value encoder as position and speed encoder
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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.
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Note!
For initial commissioning of an absolute value encoder, after an encoder,
controller or motor replacement, or for modifications regarding the
mechanics, carry out a positioning process with the positioning profile mode
"Set reference" (
¶ 119).