8 Station variants
8.3 How the "station variants" operating mode works
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The station variant that is actually being used with the gateway can corre-
spond to the full configuration or to a subset of it (in the latter case, not all
XN300 slice modules need to be present). Regardless of the configuration
used, however, the order of the XN300 slice modules must not be altered.
With the help of the function block, the user program will determine whether
one of the permitted reduced assemblies is physically connected to the gate-
way. Once this occurs, a set of program code modified as necessary for the
specific reduced assembly can be executed in the application.
8.3 How the "station variants" operating mode works
The gateway can be run in "standard" mode or "station variants" mode. Set-
ting SDO 0x4005, "Activation StationVariants Mode," to TRUE will make the
gateway switch to the "station variants" mode. XN300 Assist can be used to
determine whether the "station variants" mode has been selected.
There are two initialization phases.
Initialization phase 1
During initialization phase 1, the XN300 gateway's CANopen status will be
PRE-OPERATIONAL.
If you want to use the "station variants" functionality in the user program, the
PLC must set the "Activation StationVariants Mode" entry to TRUE during ini-
tialization phase 1. Initialization phase 1 ends with the "Start-Remote-Node"
NMT frame.
Initialization phase 2
During initialization phase 2, the XN300 gateway's CANopen status will be
OPERATIONAL.
In the "station variants" operating status, the defined full configuration will be
stored on the XN300 gateway as a list of XN300 slice modules in a permissi-
ble order. The information on the station variant to be used on the gateway
will also be stored as a list. These lists are written to the gateway via the
PLC.
As long as there is information on the full configuration/reduced assembly on
the gateway, the gateway will use the aforementioned lists for the following
purposes:
•
To run a validation check against the target configuration
•
To create a default mapping and an object dictionary based on the full
configuration
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