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1.
Use TCP Socket to connect the serial port server to the access control
machine to debug communication, and found that the normal
communication unavailable?
Fault detection:
The IP address and port number may not be configured correctly.
-
The serial port parameters may not be configured correctly.
-
RS-485 wiring may be abnormal.
-
Problem solving: found that the parity bit error, none parity modified to mark
parity, communication is normal.
2.
The serial port server could not communicate normally. It found that there
was a command, but the data from the serial port server was wrong?
Fault detection:
Older version of VSP Manager's Realcom function to receive code algorithm
exception, resulting in the serial server to open the WEB function and VSP
Manager open Realcom function, the serial port to send and receive data are
wrong.
Problem Solving: After upgrading the VSP management software, the
communication is normal.
3.
PC with straight-through cable directly connected to the serial server, Ping
test packet loss?
Check whether the Ethernet port of the serial server is damaged, if it has been
damaged, it will cause Ping test packet loss.
4.
Serial server and computer use network cable connection, the local
connection will appear "!" exclamation mark (that is, local connection is
limited)?
Fault detection:
MAC address aging.
-
The computer and the serial server are not on the same network segment.
-
Problem Solving: After a period of time to see whether the local connection "!"
Exclamation mark or the computer and serial server can be changed to the
same network segment.
5.
Serial server link LED does not light?
Fault detection:
The serial server is not powered on.
-
3onedata proprietary and confidential
Copyright © 3onedata Co., Ltd.
NP Series Serial Server User Manual
99
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