Tightening Technology | Bosch Rexroth AG 87/263
7.2 Data output via FTP
FTP provides appropriate mechanisms for a safe and reliable data transfer via Ethernet. Error protocols
and checksums and, if necessary, repeated transfer of data blocks ensure a high transmission quality.
In case of data transfer via FTP, you distinguish between two connection types:
• Explicit (FTPES)
• Implicit (FTPS)
The Nexo cordless Wi-Fi nutrunner supports the explicit mode. I.e. the FTPS client must “explicitly re-
quest” the safety from an FTPS server and then approach an encryption method accepted by both parties.
If a client does not request safety, the FTPS server may either admit this or reject the connection.
FTP has a client/server architecture, i.e. an FTP server provides its services to an FTP client, the Nexo
cordless Wi-Fi nutrunner. The FTP client is the active user and can write data to and read data from the
FTP server. The Nexo cordless Wi-Fi nutrunner only features write access.
Access to the FTP server is protected by user name and password. The protocol for data transfer is de-
fined in RFC-959 (File Transfer Protocol). As of Nexo firmware version 1200 the data can be transmitted
with SSL encoding. For configuration of the filing process and contents of the results file, various param-
eters are available.
7.2.1 Opening and closing the FTP connections for results output
Opening and closing the FTP connections is initiated by the tightening system.
The results data are always transferred asynchronously with the tightening process (after completion of
the tightening operation). The results data records are buffered by being stored by the Nexo cordless Wi-
Fi nutrunner within the tightening process, i.e. prior to CyCmp. The data are transferred independently of
the tightening cycle. The tightening function is not impaired, as long as there is enough space for new
results files.
All results files are transferred to the FTP server of the control unit (partner controller) in blocks. An FTP
connection is established when results data are available. The error signal FtpF will be set to 1 if a dis-
ruption occurs during the transfer to the FTP server. This signal will be automatically reset to 0 after the
next successful data transfer.
As of Nexo firmware version 1200: The settings for the protocol are made via the NEXO-OS operating
system in the Settings Data Standard Nexo FTP menu, see section Settings on page 203.
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