W&T 58031, Manual

Page: 63 / 217

63
W&T
Interfaces and displays
Subject to error and alteration
5.5 LED displays
• Power LED
Indicates supply voltage present. If the LED is not on,
check for correct wiring of the power supply.
• Status LED
Flashes whenever there is activity on the serial port.
Periodic flashing indicates that the port has a valid
connection to another network station. The status of the
serial port can also be read out using the Com-Server‘s
Telnet configuration tool.
• Error LED
The Error LED uses various flashing patterns to indicate
error conditions on the device or serial port. The error
texts for the previous five serial faults and the associated
system time (time between the last restart of the Com-Ser-
ver and when the error occured) can also be read out
using the Telnet configuration tool.
1 xflashing = Check network connection
The Com-Server cannot receive a link pulse from a hub.
Check the cable or the hub port.
2 x flashing = Check serial data format
The serial port received at least one character with a
parity or framing error (= parity error / framing error), or
the data register of the serial receiver ship was written
even though the previous character was not read out.
Check the correctness of the serial parameters, the
handshake procedure and the connection cable.
3 x flashing = Check serial handshake
The serial connected device is not responding to the
handshake stop signal set by the Com-Server and
continues to send data. The result can be that the serial ring
memory is overwritten and data are lost. Check the hands-
hake configuration of the device as well as the wiring of the
connection cable.