10.5.12.1 Incremental Measuring System - Siemens SINUMERIK 840D sl Commissioning Manual

10.5.12.1 Incremental measuring system

Incremental measuring systems
With incremental measuring systems, referencing is carried out using a reference point
approach divided into three phases:
1. Traversing to the reference cam
2. Synchronizing to the encoder zero marker
3. Approach reference point
Figure 10-19 Signal chart: Referencing with an incremental measuring system (principle)
Phase-independent data
The following machine data and interface signals are relevant in each of the individual
phases of the reference point approach:
● MD11300 JOG_INC_MODE_LEVELTRIGGRD (INC/REF in jog mode)
● MD34000 REFP_CAM_IS_ACTIVE (axis with reference cam)
● MD34110 REFP_CYCLE_NR (axis sequence for channel-specific reference point
● MD30240 ENC_TYPE (encoder type)
● MD34200 ENC_REFP_MODE (referencing mode)
● IS: DB21, ... DBX1.0 ("Activate referencing")
● IS: DB21, ... DBX33.0 ("Referencing active")
IBN CNC: NCK, PLC, drive
Commissioning Manual, 07/2007, 6FC5397-2AP10-3BA0
approach)
NCK start-up
10.5 Parameterize axis data
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