User Manual
ATC-3001 1-port Modbus Gateway
Copyright
©
2011
SHENZHEN ATC TECHNOLOGY CO., LTD.
14
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 ATC-3001 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 ATC-3001 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 3.20)
Figure 3.20. Ms-DOS command prompt window
Step2:
Change to new IP via telnet port 1 (Figure 3.21)
->Input
telnet 10.0.50.101 1
Note:
The telnet will be fail and ATC-3001 will be restarted automatically, after restart the IP address
should be change to 10.0.50.101
Step3:
Using new IP to configure ATC-3001 via telnet
->Input
telnet 10.0.50.101
Note
1: When using this method to change IP address, PC's IP address and ATC-3001's IP address
must belong to the same subnet.
Note
2: The changed IP address must be legal, otherwise it will be changed back to the default value
(10.0.50.100) after restart.
