CIE-H12 User Manual Ver. 1.9
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http://www.ezTCP.com
5.1.4 TCP Connection Modes
In the standard of Modbus TCP, the master program makes a connection to the slave
using port number 502. However, sometimes Modbus/TCP devices try connecting to the
master actively. For this case, CIE-H12 supports the active connection mode.
The
passive
connection
- Standard Modbus/TCP.
- Remote host connects to CIE-H12.
- Port number that is used for communication must be designated.
-
Depending on the setting of multiple connections, up to 8 hosts
can be connected.
The active
connection
- CIE-H12 tries to establish a connection to the remote host.
- The IP address (or host name) and port number of the remote
host is required.
Table 5-3 the passive / active connection
5.1.5 Initial Output Value
The initial value of CIE-H12’s output port can be configured. The output ports are set to
ON or OFF according to the value of [Initial State] at the boot time.
5.1.6 Write Pulse
By using the function code 105, you can give the signal of pulse type to the output ports.
This means the output signal is kept during the specific time configured by users.
Refer to the document [Modbus/TCP protocol] on our website for details.
