61
W&T The basis configuration of the Com-Server
Subject to error and alteration
n Wake on LAN (Default: deactive)
Up to three Ethernet addresses for network components
can be configured, which are enabled when there is a re-
start of the Com-Server via Wake-on-LAN.
1
For proper function of Wake-on-LAN it must be
supported and activated by the BIOS and the net-
work card in the destination computer.
n
Keep Alive Time (sec) (Default: 30s)
If the keep-alive check is activated by entering and saving
a value in second ticks, all TCP connections are monitored
for network-side data traffic. If there is no network traffic
within the set time, the Com-Server generates a keep-alive
packet. If the partner does not answer this packet, the
connection is reset in the Com-Server. This deletes any
data still contained in the serial in- and output buffers.
Example: A TCP client has opened a connection to TCP
server port 8000 of the Com-Server and the network con-
nection is interrupted. After the set keep-alive time plus 2s
for two repetitions has elapsed, the Com-Server closes the
connection and is again ready for any other clients.
n
Retransmission Timeouts (ms) (Default: 240)
This timeout determines what time must elapse before
network packets are repeated if necessary. In most net-
works the default setting of 240ms can be used. Only
when there are very long latency times between the
Com-Server and its respective communications partner
would you need to increase this value.
n
IP Address Conflict Detect (Default: deactive)
Firmware version 1.31 and higher enables the Com-Ser-
ver to detect and display an IP address conflict. An active
check is performed each time the Com-Server is restar-
ted. Only passive monitoring is performed during normal
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