Irinos Measurement System

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Navigation: Users Manual Irinos-System > Application notes > Incremental encoders 1Vpp or TTL/RS422

Referencing for absolute measurement

Incremental encoders are no absolute measuring devices. In order to get absolute measurement values after start-up and after a signal error, referencing is required. The Irinos-Box IR-INC provides the following possibilities for referencing:

oReferencing via index

The counter value is set to 0, if the index signal is passed.

oReferencing via software:

The counter value can be set by software any time. It is possible to set the value 0 as well as to any other value (in the valid value range).

Both actions can be done via the opcode opcSP (0x35) of the MscDll.

Please note that the Irinos-Box IR-INC can only provide the technical possibility for referencing. Details depend on the respective measurement procedure. Hence referencing must already be taken into account in the planning phase. It is particularly important to have a plan for referencing after an incremental encoder error.