For a connection with minimum reflections and the wire-break recognition at RS422/485
operation, the lines may be preset with defined static voltage levels.
At the CP interface the wiring of the receiver is realized as follows:
Parameter
Description
Wiring of the receiver
None
(00h)
No preassignment of the receiving lines. This setting
only makes sense with bus-capable special drivers.
Signal R(A) 5V
(Break evaluation)
Signal R(B) 0V
(01h)
With this preassignment break detection is possible
at fullduplex operation (RS422).
Signal R(A) 0V
Signal R(B) 5V
(02h)
This preassignment corresponds to the idle state (no
sender is activated) at halfduplex operation at
RS485. Here wire-break recognition is not possible.
Defined static voltage
levels by parameters
VIPA System SLIO
Hardware description
Structure
HB300 | CP | 040-1CA00 | en | 18-28
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