CS8C © Stäubli 2009 – D28070504A
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Chapter 5 - Integration
5.8. ETHERNET LINK
5.8.1. CONFIGURATION
The CS8C has 2 Ethernet ports, J204 and J205. The IP address of each of these ports can be modified via the
control panel. The modification takes effect immediately. On delivery, the first port is configured with the address
192.168.0.254 (mask 255.255.255.0) and the second one with the address 172.31.0.1 (mask 255.255.0.0).
It is also possible to get automatically an IP address from the network (with DHCP protocol).
The CS8C controller can reach other Ethernet sub-networks, through gateways configurable from the Control
Panel.
Each gateway is defined with:
• The IP address of the device used as gateway. The address must belong to the same sub-network as the CS8C
controller.
• The IP address of the sub-network to reach. A null address "0.0.0.0" can be used to define a default gateway,
to reach all sub-networks that are not handled by a specific gateway.
5.8.2. FTP PROTOCOL
The CS8C controller is an Ftp server that enables file exchanges over the Ethernet. All that is required is to define
the IP address of the CS8C controller to enable it to be accessed via Ftp, and use a network login and password
corresponding to a user profile as defined on the CS8C. The reading and writing access rights depend on the login
user profile selected (see paragraph 5.10.3).
A free client Ftp is supplied on the SRS CD-ROM.
5.8.3. MODBUS TCP PROTOCOL
The CS8C controller can be configured to exchange Inputs/Outputs via the Ethernet using the Modbus Tcp
protocol. In this case, the CS8C controller is considered as a Modbus Server.
The CS8C controller is configured for Modbus Tcp using the PC SRS software supplied on the CS8C CD-ROM
(Tools > Modbus IO Config). This tool is used to generate a modbus.xml file that has to be saved in the
/usr/applicom/modbus directory of the CS8C emulator. Then the file has to be transferred to the CS8C controller
using the SRS transfer tool (Emulator > I/O > Modbus). If this file is present on start-up, the corresponding
Modbus Tcp Inputs/Outputs are displayed on the control panel and are directly accessible via a VAL3 application.
The "Modbus TCP/IP Client" software option for your PC provides access to Modbus Inputs/Outputs declared
on CS8C from PC software using OPC Client, ActiveX, DLL interface (f.i Visual Basic, Delphi, Visual C++,
LabView, ...). The SRS CD-ROM provides a trial version of the software in the folder "DirectLink 3.9".
CAUTION:
The DHCP protocol may not always assign the same IP address to the controller. The DHCP
mechanism should therefore not be used when the IP address of the controller is used by
other peripheral equipment.
The two Ethernet ports must correspond to different sub-networks. Two IP addresses on the
same sub-network are not supported.
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