Digital Signaling And Evaluation - Schneeberger MINISCALE PLUS Manual

9
Technical Principles to Aid Usage of MINISCALE PLUS
9.2

Digital Signaling and Evaluation

28
Sold & Serviced By:
www.servo2go.com
Toll Free Phone: 877-378-0240
Toll Free Fax: 877-378-0249
sales@servo2go.com
sales@servo2go.com
www.servo2go.com
www.servo2go.com
The digital signals, consisting of the two incremental signals A+ and B+ and the
reference signal R+, are transmitted to the downstream electronics. This can be a
single measuring counter, a PC or a machine controller.
The downstream electronics determines the position value from the digital signals
by counting the signal edges. The counting direction is determined from the level
of the other channel in question. Depending on how many edges are being
evaluated, we talk about:
1) Single edge evaluation:
Only one edge is counted per channel. One measuring step will therefore
correspond to one digital signal period.
2) Two-edge evaluation:
Both rising and falling edges of a channel are counted. One measuring step will
therefore correspond to half the digital signal period.
3) Four-edge evaluation:
Both rising and falling edges of both channels are counted. One measuring
step will therefore correspond to a quarter of the digital signal period.
1
2
3
Edge evaluation
+A
1 Four-edge evaluation
2 Two-edge evaluation
+B
3 Single edge evaluation
4 In each case one measuring step
4
+R
EDOKATGM_0051