BECKHOFF BK2000 - Manual (Page 23)

Beckhoff-Lightbus coupler BK2000
BK2000 23
Configuration software
Interface type Interface designation Configuration software
for master configuration PC interface C1200
C1220 S1100
S1120 and
contained in TwinCAT, S2000,
S2100 and S2200
PC with
Beckhoff-
Lightbus Beckhoff IPC products with
C1230 contained in TwinCAT, S2100
and S2200
PLC interface C1xxx C1xxx
General General
Ensuring data
consistency
Consistency of a station's data is ensured by the data transfer protocol of
the Beckhoff-Lightbus. Consistency throughout the entire process image
can be achieved by activation of the "Update" and "Int" commands in the
master.
Asynchronous access by the controller CPU (in most cases PLC or IPC) to
the data area of the Beckhoff-Lightbus master may lead to inconsistency.
The Beckhoff-Lightbus masters contain mechanisms for avoiding
asynchronous access, thus ensuring data consistency. For further
explanations, please refer to the manuals of the corresponding interfaces.