10
Quickstartforinitialstart-up
4
QUICKSTART FOR INITIAL START-UP
“büS”
(Bürkert system bus) stands for the communication bus developed by Bürkert and is based on the CANopen
protocol. The following steps refer to the application of the e.g. EtherNet/IP protocol using a Bürkert gateway pre-
configured for a maximum of 63 control heads.
For other gateway configurations (e.g. in conjunction with ELEMENT positioners), the specific documentation for
preconfigured Bürkert gateways must be observed.
After mounting the control heads (Type 8681 büS/CANopen) in the network, the following operations must first
be carried out on the control heads:
1.) Addressing of the control heads
According to chapter “6.13.2 Setting the büS/CANopen address (Node ID)” each control head in the network must
be assigned its own unique address (Node-ID).
When using a preconfigured gateway:
For easy commissioning, each control head should be assigned its unique
node ID between 1 and 63 using the DIP switches. This allows the preconfigured communication settings between
the gateway and each control head to be used. The factory setting (address “0” = softwareconfigurable address/
node ID) should not be used furthermore.
When using a non-pre-configured gateway or when using the factory setting “0” (software-configurable
address/node ID):
A device configuration via Bürkert Communicator on site is required for commissioning each
control head (see also section “6.13.3” on page 36 ).
Error-free parameter access by the Logix Designer:
To ensure this, the new addresses should be selected
clearly arranged and in sequence (starting with “1” and without gaps in the numerical series!).
Any change of the device address requires a device restart.
2.) Setting the baud rate
Set the baud rates according to chapter “6.13.1 Setting the baud rate”. The combination of cable lengths and baud
rate is very important (see chapter “6.5.2 Total line length and drop line lengths of the bus cables”).
The baud rate of all devices connected to the network (including the gateway) must be the same .
Any change of the baud rate requires a device restart.
3.) “Hiding” of non-existent devices
If less than 63 devices are assigned to the gateway, the non-existent devices must be “hidden” at the gateway, both
outputs AND inputs - see chapter “6.17 Configuration of the control head network”, either using the Logix-Designer
(“6.17.1”) or Bürkert Communicator (“6.17.2”).
After the changes have been made, a device restart is required.
4.) Careful closing of the electrical connections
Due to moisture (including steam) in the system, all electrical connections (M12 plug-in connections) must be
firmly screwed on with 0.6 (+0.1) Nm. All open electrical connections must be well “sealed” with protective
caps (see information box in chapter “6.2 Network principle / Interfaces” and also chapters “7 Accessories” and
“8 Cabling examples”.
english
Type 8681 büS/CANopen
Summary of Contents for 8681
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