How to set driver number through address config

[rajkumar.krishnan]

Hello,

I would like to set the modbus driver number through address config. But there is no attribute which takes driver number. Do i need to use a different config to set the driver number or any other solution through scripting.

Thanks in advance

Regards,
Raj

[leoknipp]

Hello,

the driver number is specified with the _distrib-config. This information is not part of the _address-config.
When modifiying the _distrib-config all driver related configs are deleted and have to be created again.

Best Regards
Leopold Knipp
Senior Support Specialist

[fmulder]

Note that the _distrib config 'lives' in the Event manager. This also means that you can do a dpQuery() to ask for all items that have a certain driver number. The _distrib config tells the Event to what driver to send the messages to.
The _address config lives inside the driver(s) (and not in the memory of the Event). This also explains why you can't do a dpQuery() on this config.

You always have to set the two in combination.

A good tip to know how this can be done is to simply text-search for the text "_distrib" in the various WinCc OA scripts. You'll find script code where this config is set.

For example:
You'l find
(where 'config' is _address ! )
dpGet(dpe+":"+config+".._active",active,
dpe+":"+config+".._reference",reference,
dpe+":"+config+".._subindex",subindex,
dpe+":"+config+".._mode",mode,
dpe+":"+config+".._reply",reply,
dpe+":"+config+".._datatype",datatype,
dpe+":"+config+".._drv_ident",drv_ident,
dpe+":_distrib.._driver",driver);