Web Server
XW-210 WiFi™ Users Manual
know the IP address of XW-210. This means that XW-210
can get its IP address dynamically from a
DHCP server, simplifying the installation. Second, since the connection from XW-210 is outgoing, rather
than incoming, the local router on the network where XW-210 resides doesn't need to be configured to
forward sockets. This simplifies the installation. Since the router configuration is not modified, the risk of
compromising security on the local network is eliminated.
MODBUS/TCP
XW-210 can support Modbus/TCP. Modbus is a messaging structure protocol used in industrial
manufacturing control and automation. It is an open protocol and offers interoperability with software and
devices from other manufacturers. (See
Section 6.6: Modbus Operation.
)
Note: Modbus communications are disabled whenever the Control Password is enabled.
Modbus Port:
This specifies the port used for Modbus/TCP communications with XW-210. By default this is set to port
502 which is the standard Modbus port. It can be set within the range of 1 to 65535.
Endianness:
32-bit data is treated as two individual 16-bit words using IEEE 754 floating point format. Floating point
format is used for sensor data and pulse counter as well as for setting output pulse duration.
When the XW-210 is set for big-endian architecture, the most significant 16-bit word (big end) is sent
first. Otherwise the XW-210 will use little-endian architecture, and the least significant word (little end) is
sent first. The default setting for this is little-endian.
For example, in little-endian format, a 32-bit floating point number represented by '1234 ABCD' is sent as
'ABCD1234
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