Atop MB5400, Руководство пользователя

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Atop Modbus Gateway
MB5400 Series
User’s Manual V 1.3
34

Remote IP Address: This setting shows the IP address of the serial device which is a
Modbus slave node. This address refers to the IP address that belongs to the serial device
that is going to be controlled from your MB5400 Series. Note that this serial device can
also be considered as a TCP server in which we need to know its IP address. This option
will disappear when you select the operation mode as TCP Master because in that mode
the serial device will be running as a TCP client which does not require to publish its IP
address.

TCP Port: This setting shows the TCP port number of the serial device (or Modbus slave
node in Fig. 3.17) which can be a number in between 1 and 65535. The default port
number is 502.

TCP inactivity Time Out: A time out period, which is the period of time allowed between
actions, can be set as well. This setting has a maximum duration of 600 minutes (36000
seconds) or 10 hours. If no activity has occurred within this period, the Modbus/TCP
connection will be automatically terminated by the Modbus Gateway.
At the end of the TCP Settings page as shown in Fig. 3.17, there is a list of all configured
Modbus/TCP connections with TCP No., Operation Mode, Remote IP Address, TCP Port and
TCP Inactivity Time Out information. User will have the ability to remove any Modbus/TCP
connection settings by checking on box in front of the record of the desired TCP settings and
clicking on the Remove button. To remove all TCP connections, simply check the box on the
header row of the list to select all items and click remove.
Alternatively, the Modbus/TCP connection can be configured to run in TCP Master Operation
Mode . This means that the serial device will be a Modbus master node and communicate using
Modbus/TCP protocol. Fig. 3.18 shows the TCP Master Settings. When select the TCP Master
Operation Mode , the Remote IP address setting will disappear because the serial device will
be running as a TCP client. Next, the TCP Port is the port through which the signal is going to
be relayed upon by the Modbus Gateway. Once again, there is a TCP Inactivity Time Out with
the same maximum value of 10 hours as stated in the previous mode.