214 Fieldbus Communication
WAGO-I/O-SYSTEM 750
750-880, 750-880/025-000 ETHERNET Programmable Fieldbus Controller
Manual
Version 1.0.1
The addresses of the DNS server are configured via DHCP, BootP or web-based
management. Up to 2 DNS servers can be specified. The host identification can be
achieved with two functions, an internal host table is not supported.
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12.1.2.5 SNTP-Client (Simple Network Time Protocol)
The SNTP client is used for synchronization of the time of day between a time
server (NTP and SNTP server Version 3 and 4 are supported) and the clock
module integrated in the (programmable) fieldbus coupler or controller. The
protocol is executed via a UDP port. Only unicast addressing is supported.
Configuration of the SNTP client
The configuration of the SNTP client is performed via the web-based
management system under the “Clock” link. The following parameters must be
set:
Table 84: Meaning of the SNTP Parameters
Parameter
Meaning
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Adresse des Time-Servers
The address assignment can be made over an IP address.
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Time zone
The time zone relative to GMT (Greenwich Mean time). A range
of -12 to +12 hours is acceptable.
Update Time
The update time indicates the interval in seconds, in which the
synchronization with the time server is to take place.
Enable Time Client
It indicates whether the SNTP Client is to be activated or
deactivated.
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12.1.2.6 FTP-Server (File Transfer Protocol)
The file transfer protocol (FTP) enables files to be exchanged between different
network stations regardless of operating system.
In the case of the ETHERNET coupler/controller, FTP is used to store and read
the HTML pages created by the user, the IEC61131 program and the IEC61131
source code in the (programmable) fieldbus coupler or controller.
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A total memory of 2 MB is available for the file system.
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Note
Cycles for flash limited to 1 million!
Up to 1 million write cycles per sector are allowed when writing the flash for the
file system. The file system supports "Wear-Leveling", so that the same sectors
are not always written to.
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