The following diagram describes the operating modes of the Ethernet channel of the TSX P57 6634/5634/4634:
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After power-up, the coprocessor performs self-tests. During this phase, the STS LED is lit. After the self-tests, the STS LED switches off.
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When the configuration is received, the Ethernet channel resets the current communication to 0 before configuring itself (terminates current exchanges, shuts down TCP connections).
The channel is then operational. The STS LED is lit.
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The I/O Scanning and Global Data functions start when the PLC switches to RUN mode and stop when the PLC switches to STOP mode.
Special Cases: Channel Not Configured
If the Ethernet channel is not configured in the Control Expert application, it takes the IP address built from its MAC address:
085.016.xxx.yyy where xxx and yyy are the last two numbers of the MAC address.
Example
The MAC address is (in hexadecimal): 00 80 F4 01 12 20
In this case the default IP address is (in decimal): 085.016.018.032
The channel also transmits BOOTP requests to obtain another IP address. These requests are sent until a DHCP server responds or until Control Expert provides a new configuration.
An unconfigured Ethernet channel allows you to receive:
If the STS LED flashes five times, then the IP address of the Ethernet channel is taken from the MAC address.
If the STS LED stays permanently on, then an IP address has been served by another network device. This IP address can be read in the channel's IP address language objects.
