July 2013 6.7 Reference marks 801
Encoders with
EnDat interface
Encoders with EnDat interface can be connected to the position and speed
inputs of the controller unit CC 6xxx. With these encoders there is no need to
traverse the reference marks. The position value is only read when the control
is switched on. It cannot be read again.
When connecting a position encoder with an EnDat interface:
Enter MP1350.x = 5.
When connecting a speed encoder with an EnDat interface:
The iTNC automatically attempts to communicate with the encoder.
When connecting a speed encoder with an EnDat interface as a position
encoder:
Enter MP1350.x = 5.
In MP110.x, enter 0 for the axis with the speed encoder with EnDat
interface.
Setting MP960.x (machine datum) when using rotary encoders with EnDat
interface:
Move the axis (encoder) to the nominal datum.
Enter the displayed value of the deviation in MP960.x. Reverse the algebraic
sign.
or:
Set the cursor in the active machine-parameter file to the corresponding
MP960.x.
Press the actual-position-capture key.
Enter "0" in the datum field and press Enter. The current actual value is then
entered automatically in MP960.x.
MP1350.x = 8 enables you to reference incremental encoders with EnDat 2.2
protocol. With these encoders the absolute value is not available after switch-
on, so that reference marks must be traversed. If this type of encoder is
connected to the position input, bit 3 of MP118.x must be set. This type of
encoder cannot be used at the speed encoder input yet.
If use of multiturn encoders with EnDat interfaces results in overruns, the
corresponding information is entered in the system file NCDATA.SYS. For
a control exchange, this file must be transferred or MP960.x must be
readjusted.
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