BECKHOFF BK7000 - Manual (Page 19)

ControlNet coupler BK7000 in the ControlNet
BK 7000 18
The transfer medium: plugs and cables
Physics of the transmission The physical data transfer is defined in the ControlNet standard.
The BK7000 supports redundant media access with the two BNC connec-
tors A and B. Additionally a monitor or configurating system can be con-
nected over the NAP-Port.
Setting the station
Addresses The station address is set by way of the rotary switches on the left of the
bus coupler. The address is set as a decimal number. The top rotary switch
stands for the units position and the bottom one stands for the tens position
of the address. (Example: station address 18: bottom rotary switch = 1, top
rotary switch = 8). To ensure that the rotary switch setting is saved by the
BK7000 it must be reset (by briefing interrupting the power supply or by
means of a software reset).
Address selector
Configuring the master
The assembly object of the BK7000 represents the process image buffer of
the terminal bus inputs and outputs. The data of this buffer can be sent or
received over a single connection. Assembly objects are used to produce
(terminal bus inputs) and/or consume (terminal bus outputs) data to/from
the network.
So the inputs and ouputs of the terminals will be connected to the Control-
Net with the assembly object. All output data will be sent from the scanner
in one scheduled telegram and all input data will be sent to the scanner in
another scheduled telegram.