4.7 Terminal Server Function
It is used to provide dedicated connectivity between computers and serial devices through the iServer over the Ethernet, without dedicated wiring. The typical Internet protocol consists of a request and a replay to that request. In this situation the server is the Host that generates the request and receives the replay from the device, that gets forwarded to the appropriate party on the network. But there are specific applications where a message is generated by the device, and the server is simply passing the data to the appropriate party on the network, in this situation the server acts as Slave. Examples are the Attendance Time Clocks, Bar Code Readers, remote Displays or Electronic signboards, etc.
For the iServer to pass the data back and forth between its Serial and Ethernet interfaces, the Terminal Server option needs to be configured as follows (Figure 4.13):
1.Set the Server Type to Slave
2.Set the Number of Connections to 0.
3.Set the Local Port or Socket number to any number from 599 - 65535, except numbers 1000 and 2002.
4.Press the Save button to store the new settings.
From your application software on the host machine, you can now point to the IP address of the iServer and the assigned port number to establish a TCP connection to your serial device connected to the serial port of the iServer.
If DIP switch #4 is
“ON”, Terminal Server function is always enabled, regardless of the firmware configuration.
By default, this DIP switch is set to “OFF” position.
You have the option to enable the Terminal Server feature either through the firmware or the DIP switch #4.
CONFIGURATION
Address http://192.168.1.200
CONFIGURATION
Serial Communication
Baud Rate 9600 |
| Data Bit 7 Bits | Parity odd | Stop Bits1 bit | ||
Flow Control none | Transciever | Modbus/TCP disable | ||||
End Character (Hex) | 0D | Forward End Char enable | Timeout 0500 msecs | |||
| Serial Port Password | disable | 1234abcd | |||
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| Terminal Server | |||
TCP/UDP TCP | Server Type slave | Number of Connections 0 Local Port 02000 | ||||
Connection Ctrl | not used |
| Device No. 1 | Connection Timeout 00100 msecs | ||
| Remote Access (Tunneling) | |||||
Remote Access | disable | Remote IP Address 0.0.0.0 | Remote Port 02000 | |||
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| Save | Reset |
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| Main Menu |
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Figure 4.13 Terminal Server Configuration
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