When the ZVZ=0 the character delay time (ZVZ) will be calculated automatically (about
double character time).
Option6: ZVZ (High byte)
Option7: ZVZ (Low byte)
Range of values: 0 ... 65535
n
Default: 250
Defines the number of receive buffers. When only 1 receive buffer is available no more
data can be received while the receive buffer is occupied. The received data can be redir-
ected into an unused receive buffer when you chain up to a maximum of 250 receive buf-
fers.
Range of values: 1 ... 250
n
Default: 1
Via the Operating mode you may specify if the interface is operated in half-duplex
(RS485) or full-duplex (RS422) operation.
At half-duplex parameterization with RS485 software data flow control is
not possible.
Value
Description
00h
Half-duplex - Two-wire operation (RS485)
Data is exchanged between the communication partners but only in one direction at a time. In half-
duplex operation, therefore, at any one time data is being either sent or received.
01h
Full-duplex - Four-wire operation (RS422)
Data is exchanged between the communication partners in both directions simultaneously. In full-
duplex operation, therefore, data may be sent and received at the same time. Each communication
partner must operate simultaneously a receipt line.
Range of values:
00h: half-duplex
01h: full-duplex
n
Default: 00h
For a connection with minimum reflections and the break evaluation at RS422/485 opera-
tion, the lines may be preset with defined static voltage levels.
At the CP interface the wiring of the receiver is realized as follows:
Parameters
Description
Wiring of the receiver
00h
(Default)
None
No pre-assignment of the receiving lines.
This setting only makes sense with bus-capable special drivers.
OPTION8: Number of
receive buffers
OPTION15: Operating
mode
OPTION16: Line assign-
ment
VIPA System SLIO
Serial communication protocols
ASCII > Parameter data of ASCII
HB300 | CP | 040-1CA00 | en | 18-28
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