4 assign a new ip address by arp command – Atop Technology MB5001C User Manual User Manual
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User Manual Version 1.0
MB5001C series 1-port Modbus Gateway
Copyright © 2010 Atop Technologies, Inc.
All rights reserved. Designed in Taiwan.
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TCP Listen Port: Modbus/TCP Listen port. Default is 502.
Please note that Ethernet interface only support Modbus Slave.
TCP Connections(s): Maximum of four simultaneous Modbus/TCP connections is allowed.
Serial Reply Timeout: If the serial side does not respond with the specified time, data would be dropped
and not transmitted over TCP even if the gateway receives it later.
Serial Protocol: Select between Modbus/ASCII and Modbus/RTU.
Please note that Serial interface only support Modbus Master.
Serial Timeout Retry: If
“0” is set, the gateway would not store TCP packets in the buffer. If the number is
greater than
“0”, the gateway would store the TCP packets in the buffer and retries the specified times when
the Modbus device on the serial side does not respond.
Note:
After configuring the parameters, click on the “Save Configuration” button to save the changes, please
note
that the setting will not become effective until “restart” is clicked.
3.4 Assign a New IP Address by ARP Command
Use ARP command to assign a static IP address of MB5001C using its hardware MAC address. The MAC
address is printed on the rear side of device in the format of "0060E9-xxxxxx". The following example shows
how it works within MS-DOS command prompt window.
(For example change IP from 10.0.50.100 to 10.0.50.101,and the MAC address of MB5001C is
00-60-e9-11-11-01)
Step1: Add the new host IP to ARP table
->Open Ms-DOS command prompt window
->Input arp -s 10.0.50.101 00-60-E9-11-11-01 (Figure 3.26)
Figure 3.26. Ms-DOS command prompt window
Step2: Change to new IP via telnet port 1 (Figure 3.27)
->Input telnet 10.0.50.101 1
Note: The telnet will be fail and MB5001C will be restarted automatically, after restart the IP address
should be change to 10.0.50.101
Step3: Using new IP to configure MB5001C via telnet
->Input telnet 10.0.50.101
Note 1: When using this method to change IP address, PC's IP address and MB5001C 's IP address
must belong to the same subnet.