YASKAWA CP 040 RS422/485 Manual page 37

VIPA System SLIO
Defined static voltage
levels by parameters
Parameter
None
(00h)
Signal R(A) 5V
(Break evaluation)
Signal R(B) 0V
(01h)
Signal R(A) 0V
Signal R(B) 5V
(02h)
HB300 | CP | 040-1CA00 | en | 18-28
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:
Description
No preassignment of the receiving lines. This setting
only makes sense with bus-capable special drivers.
With this preassignment break detection is possible
at fullduplex operation (RS422).
This preassignment corresponds to the idle state (no
sender is activated) at halfduplex operation at
RS485. Here wire-break recognition is not possible.
Hardware description
Wiring of the receiver
Structure
37