July 2010 18 – 293
18.2 Speed Encoders
18.2.1 Introduction
Speed encoders in motors are also referred to as motor encoders.
They report positions and movements of the axes and spindles to the control.
iTNC 530 operates with incremental and absolute encoders.
Encoders with one reference mark or distance-coded reference marks and with EnDat interface
are permissible.
Speed encoder
inputs
Following speed encoder inputs are located on the CC 422 or CC 424 (B):
îš„ X15 to X20
îš„ X80 to X87 (depending on the expansion stage)
Monitoring of
rotary encoders
For digital axes the speed encoders are always monitored!
Assignment of
speed encoders
MP 100 is read from the right to the left and contains the information which axis is the first, the
second, the third axis, etc.
The inputs of the speed encoders for the CC 422 and the CC 424 (B) are assigned in different
machine parameters.
MP 100 must not be changed!
MP 112.x is not active for the CC 424 (B)!
The encoder inputs and PWM outputs are exclusively selected via MP120.x/MP121.x.!
(In the special case that a second spindle is used on a power module, MP 113.x is still
applicable).
Assignment of speed encoder inputs in
the machine parameters
Axes Spindles
CC422 Machine parameter MP 112.x MP 113.x
CC 424 (B) Machine parameter MP 120.x MP 121.x
CC 422:
As of MP 112.6 (7th axis) the connectors as of X80 can be allocated but not MP 112.0 to
MP 112.5.
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