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MDS iNET Series Reference Manual
05-2806A01, Rev. L
2.6.7 Configuring for MODBUS/TCP Server
Invisible place holder
Figure 2-46. MODBUS/TCP Server Menu
•
Status
—Enable/Disable the serial data port.
•
IP Protocol
—MODBUS/TCP Server. This is the type of IP port that will be offered by the trans-
ceiver’s serial device server.
[TCP, UDP, PPP, DF1/EIP, MODBUS/TCP Server; TCP]
•
MODBUS/TCP Server Port
—Port on which the MODBUS/TCP Server will listen.
[0-65535; 502]
•
MODBUS Serial Format
—The desired MODBUS Serial format
[MODBUS/RTU, MODBUS/ASCII; MOD-
BUS/RTU]
NOTE:
The only difference between MODBUS/RTU and MODBUS/ASCII is the form of the framing
sequence, error check pattern, and address interpretation.
•
MODBUS Serial Timeout
—MODBUS serial timeout in milliseconds (ms).
[100-65535; 500]
•
Data Baud Rate
—The baud rate of the transceiver’s serial port to which the external device is con-
nected.
[1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200; 9600]
•
Byte Format
—Byte format of the serial port.
[7N1, 7E1, 701, 7N2, 7E2, 702, 8N1, 8E1, 801, 8N2, 8E2,
802; 7N1]
•
Flow Control
—RTS/CTS handshaking between the transceiver and the connected device.
[Enabled,
Disabled; Disabled]
NOTE:
MODBUS/TCP functionality is provided on the COM2 port only.
2.6.8 IP-to-Serial Application Example
You have a choice to use UDP or TCP to establish communications. This will depend on the type of device
you are communicating with at the other end of the IP network. TCP is illustrated in this example.
In TCP mode, the transceiver remains in a passive mode offering a socket for connection. Once a request is
received, data received at the serial port will be sent out through the IP socket and vice versa, until the con-
nection is closed, or the link is interrupted. In this mode, the transceiver behaves the same, whether it is an
Access Point or a Remote (refer to Figure 2-47 and Table 2-1 on Page 59).
NOTE:
The TCP session has a timeout of 10 minutes (600 seconds). If inactive for that time, it will be
closed.
The
transceiver will offer the port again for connection after this time expires.
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