22.6.17
UNIGATE
®
fieldbus gateway UNIGATE
®
EL - DeviceNet
™
V. 1.0
44
Deutschmann Automation GmbH & Co. KG
Implemented protocols in UNIGATE® EL
15.3.3 TCP (server)
Once a remote participant starts a connection to the UNIGATE
®
as Client, the status switches to
data exchange (the green Power/State LED changes from flashing green to bright green.)
With this type of connection, it is irrelevant who sends a packet first, as the Client actively produ-
ced a connection to the UNIGATE.
No second TCP/IP connection can be established.
Note: If the Client terminates the connection during communication (i.e. the
UNIGATE
®
sends the TCP/IP packets) system error 14 will be displayed on
the LED’s.
Note: There is no information about the Link-State (e.g. if a RJ45 connector
is connected to a counterpart station.
Note: Automatic timeout after 45 seconds if there is no Acknowledge (ACK)
from the counter part when a TCP/IP packet is send.
The UNIGATE
®
closes the connection automatically. The green Power/State
LED flashes.
This can happen if the Client is no longer available. As soon as a Client is
available he can open a connection to the UNIGATE
®
.
Connection is terminated without the Client notifying the Server UNIGATE
®
.