Functional safety technology Page 25
Product Manual / Mounting Instructions „Servo drives ARS 2320 FS, ARS 2340 FS and ARS 2360W FS“ Version 1.0
6.1.2 Fieldbus specific functional assignment of the DIP switches
The firmware of the ARS 2000 FS servo drives distinguishes itself by the universal support of various
types of fieldbuses. Since every fieldbus requires a specific hardware, the fieldbus is selected based on
the fieldbus module that is plugged into one of the technology slots. Depending on the identified
technology module, the individual switches have an influence on the activation and, where applicable,
also on the configuration of this specific fieldbus. If the system does not find any fieldbus technology
module, the switch settings affect the fieldbus CAN whose interface is integrated into the basic device.
This means that if, for example, a Profibus module is installed, then the switch positions cannot be used
to activate the CAN communication.
The assignment of the individual switch positions to a specific function depends on the fieldbus that is
used. As far as this is possible, the function of a switch is the same for all of the fieldbuses such as, for
example, switch 8 for activating/deactivating the communication. The functions are listed in the table
below.
The following general rules apply to the communication parameterisation of the technology modules that
are also listed in the table below.
Switch position = 0:
The activation of the communication, baud rate, and fieldbus address will be taken from the
parameter data set or – depending on the parameterisation – optionally also by an addition of digital
inputs.
Switch position <> 0:
The configuration of the communication parameters via the DIP switch takes precedence over the
corresponding settings in the parameter data set:
Activation of the communication via DIP switch
Selection of the baud rate (if it can be adjusted) via DIP switch
Setting of the fieldbus address via DIP switch (addition to the basic node number taken from the
parameter data set)
If the communication is deactivated via the DIP switch, it is optionally possible to reactivate or
deactivate it via the Metronix ServoCommander
®
parameterisation software.
The fieldbus address that is set via the DIP switch is checked internally for validity and, if necessary,
it is limited.
Fieldbus-specific functions (for example CAN: check for double node numbers) are configured via the
settings in the parameter data set.
If no fieldbus technology module is connected, the DIP switch is used for the configuration of the CAN
hardware that is integrated in the basic device.
The control of operating parameters for the RS485 communication that is also supported in the basic
device is not possible in favour of the parameterisation of the CAN interface.
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