JVL MIS17 Series User Manual page 125

Integrated step motors, including step motor controller smc66, smc85
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5.8
Absolute Multi-turn Encoder
5.8.4
Operation of the encoder when NOT using MacTalk.
The following description is useful for reading the encoder or presetting a new encoder
value if MacTalk is not used for the communication.
This could for example be when using one of the Ethernet options.
Reading the encoder position.
The encoder position is read from the register 46 (AbsEncPos). The value is scaled to
match the motor resolution which means 409600 counts per motor revolution.
Presetting a new encoder position.
Write the new encoder value to register 144 (P_NEW) and afterward write 316 into the
register 24 (Command reg). Notice that this value must match the motor resolution
which means 409600 counts per motor revolution.
Optionally the desired position value (P_SOLL and P_IST) can be set to the same position
by writing the value 119 to the register 24 (Command reg).
5.8.5
Updating the Encoder firmware
The the H3/H4 encoder contain a firmware which is programmed from factory.
This firmware normally follow the encoder through the products lifetime.
Bit if it have been lost for some reason or need an update because a newer firmware have
been released having additional features it described in details how to do in
date the encoder
JVL Industri Elektronik A/S - User Manual - Integrated Stepper Motors MIS17x, 23x, 34x, 43x
FW, page
88.
Only MISxxx---H3/H4--
How to up-
125

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