Specifications

1070 072 131-102 (96.08) GB
BUEP64 Protocol9-14
9.7 Initialisation Conflict
If a device responds to the start character (STX) by issuing the start cha-
racter (STX) itself, an initialisation conflict occurs.
The device with the low priority resets its transmit job and signals its rea-
dy-to-receive state (DLE).
The low-priority device executes its transmit job following the receive and
connection release procedures.
NOTE –
When installing the link, ensure that the low priority is allocated to
one device and the high priority to the other device.
9.8 Quasi-Duplex Mode
Strict adherence to the request message - response message sequence
is mandatory for the R500(P)!
Bidirectional data traffic in Quasi-duplex mode: if the R500(P) request
messages are not directly answered with the response message from the
PST (because the PST first transmits a request message), this R500(P)
status is terminated with a fault message.