The basics of counting, measurement and position detection
2.2 Basics of counting, measuring and position input (TM Count, TM PosInput, Compact CPU)
Counting, measurement and position detection
Function Manual, 12/2017, A5E32009889-AG
71
SSI signals
Signals from SSI absolute encoders
The SSI absolute encoder and the technology module communicate via SSI data signals
DAT and /DAT (D) and the SSI clock signals CLK and /CLK (C). SSI uses the RS422 signal
standard. The signal information is coded in the respective differential voltage between C
and /C as well as D and /D.
Monitoring of the encoder signals and the SSI frames
The technology module monitors the signals of an SSI absolute encoder for wire breaks,
short-circuits, and offset voltages. The technology module also monitors SSI frames for
errors.
If you enable the diagnostic interrupts in the device configuration, the technology module
triggers a diagnostic interrupt in the event of encoder signal or SSI frame errors.
To Next Page
Loading...
