Encoder Interface; Position Encoders; Introduction - HEIDENHAIN iTNC 530 Service Manual

17 Encoder Interface

17.1 Position Encoders

17.1.1 Introduction

Position encoders report positions and movements of the machine to the control. The iTNC 530
operates with incremental and absolute encoders with EnDat interface.
Linear position encoders include scales and scale tapes.
Position encoders can also be angular encoders.
Following position encoder inputs are located on the MC 42x (B):
On the CC 424 there are the following position encoder inputs:
Scales for linear axes or angular encoders for rotary axes/spindles can be connected here.
The monitoring functions for the position encoders are activated in MP 20.x.
The following criteria are checked:
Criterion
Absolute position with distance-
coded reference marks
Amplitude of encoder signals
Edge separation of encoder
signals
MP 100 contains the axis sequence (first, second, third axis, etc.)
May 2006
X1 to X6
X35 to X38 (depending on the expansion stage)
X201 to X206
X207 to X214 (depending on the expansion stage)
DANGER
The monitoring functions for the position encoders (MP 20.x) must always be active!
Safe machine operation is not ensured without these movement monitoring functions.
Exception: MP 20.0 is only active for position encoders with distance-coded reference
marks.
Caution
MP 100 must not be edited!
Error message
Encoder <AXIS> DEFECTIVE
Encoder AMPLITUDE TOO LOW
<AXIS>
Encoder <AXIS>: FREQUENCY TOO
HIGH
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