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3 608 870 A47
7.7
VW-XML protocol
As of Nexo firmware version 1200, the VW-XML protocol is supported. VW-XML version 2.1 is supported.
As of Nexo firmware version 1400, the VW-XML version 2.0 is supported.
Application of the VW-XML protocol outside of VOLKSWAGEN AG is subject to express written
agreement of VOLKSWAGEN AG.
The VW-XML protocol is the implementation of the VW corporate requirement specifications "Controlled
tightening systems", chapter 4 "Communication with superior units", for the Nexo cordless Wi-Fi
nutrunner. This documentation only documents the settings for the Nexo cordless Wi-Fi nutrunner
regarding the VW-XML data protocol
the requirement specifications mentioned above.
The settings for the protocol are made via the NEXO-OS operating system in the
Settings Data VW-XML menu, see section
Communication between the Nexo cordless Wi-Fi nutrunner and the superordinate computer (master
PC) can be realized via VW-XML protocol. During communication, the superordinate computer acts as
master and the Nexo cordless Wi-Fi nutrunner acts as slave.
The VW-XML protocol is a communication protocol based on standard Ethernet TCP/IP.
The VW-XML protocol uses the OK/NOK counters of the Nexo cordless Wi-Fi nutrunner. For setting the
OK/NOK counter via menu Settings OK/NOK counter, the following has to be observed:
1.
2.
7.7.1
Assignment of PLC signals
To ensure proper function of the VW-XML protocol, the vwXml PLC module has to be activated in menu
Settings PLC signals.
•
•
Nexo cordless Wi-Fi nutrunner | 3 608 870 A47/2019-10
Under Select PLC signals, activate Prg0... Prg7.
Make the following settings under Counter records:
a. Under OK counting direction and NOK counting direction, the counting direction is increasing
(1,2,..,n).
The potential value for NOK tightening defined by the VW-XML master PC (tag <MNO>) is
increased by 1 as one more tightening process is to be allowed after the last NOK tightening as
defined in the VW corporate requirement specifications.
b. Enable the Disable when reaching the number of OK/NOK check box for nutrunner and
Prg99. If the OK or NOK counter is reached, the nutrunner and Prg99 are disabled.
After the first tightening process, the Nexo cordless Wi-Fi nutrunner is neither disabled in case of
OK nor NOK result.
Except for the Cw and Ccw signals, all control signals have to be applied under Inputs to the vwXml
module according to the designation highlighted in gray. The Cw and Ccw signals are applied on the
tool PLC module.
All control signals have to be applied under Outputs to the vwXml module according to the
designation highlighted in gray.
Tightening Technology | Bosch Rexroth AG 165/279
(see page
228); the basic and general information is described in
Settings on page
208.
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