HEIDENHAIN PWM 20 - Manual (Page 28)

November 2014 Software description 29
Encoder connection
Please ensure that the correct supply voltage is selected to avoid damage to the encoder.
The cable between the encoder and the PWM 20 must not be connected or disconnected
while under power. Otherwise the encoder and the PWM 20 might be damaged.
Check whether the cable between the encoder and the PWM 20 is correctly wired.
The pin layout of the encoder is included in the specifications. The pin layouts of the connecting
cables are described in the catalog. An incorrectly wired connecting cable might damage the
encoder and the PWM 20.
3 Select "Use power supply from subsequent electronics", if the PWM 20 is in feed-through
mode and supposed to be powered from the subsequent electronics.
Exception: Do not set the checkmark for the feed-trough mode with SA 100 / SA 110!
The subsequent electronics cannot supply power due to the potential segregation of the
SA 100 / SA 110.
The PWM is powered by the subsequent electronics.
(PWM 20 in feed-through mode)
Note
"Use power supply from subsequent electronics" is only required for the feed-through mode
of the PWM 20. This means that the checkmark may only be set, if the PWM 20 is
connected to the control loop between the control and the encoder (closed loop; X2 OUT
connected to subsequent electronics) without an SA 100 / SA 110.
Note
HEIDENHAIN recommends automatic connection by entering the ID number.
Automatic connection through entering the encoder ID is mandatory for feed-through
mode at axes with absolute encoders!
The relevant encoder data is read from a database. This database is part of the ATS
software.
The encoder database contains all ID numbers and variants of the encoders that existed
when the ATS software was released.
The database is updated about every six months.
You will find the most recent data at www.heidenhain.de.
DANGER
If the manual setting of the encoder parameters does not match the connected encoder,
the encoder, the IK 215, the PWM 20 or the computer may be damaged.
Note
For the encoder data, please refer to the respective mounting instructions or machine
documentation. Contact the machine manufacturer or the HEIDENHAIN Service.