ControlByWeb X-600M, User Manual

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Setup Pages X-600M Users Manual
Modbus Enabled:
Modbus/TCP is enabled by selecting Yes in this field. The default setting for this field is No . ( See
Section 5 Modbus Operation for more information on using X-600M on a Modbus network. )
Modbus Port:
This specifies the port used for Modbus/TCP communications with X-600M. By default this is set to
port 502 which is the standard Modbus port. It can be set within the range of 0 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, pulse counter, analog, and frequency data as well as for setting
output pulse duration. If the check box is set, the X-600M will use big-endian format, and the most
significant 16-bit word (big end) is sent first. If the box is cleared, then the X-600M will use little-
endian format, and the least significant word (little end) is sent first. The default setting for this box is
little-endian. For example, in little-endian format, a 32-bit floating point number represented by '1234
ABCD' is sent as 'ABCD 1234'.
To make I/O available over Modbus TCP/IP, a mapping must be created. I/O can be added to the
three tables in order to make them available. For example, to make a temperature sensor available
as a holding register at Modbus address 0010, click on the “
--- ” next to address 0010 in the Holding
Register table. A drop down list of I/O will appear. Select the temperature sensor and click Submit .
Now the Modbus master can access the value of the temperature sensor by reading Holding
Register 0010. Similarly relays and outputs can be mapped to coils by adding them to the
Coils
table, and digital inputs can be mapped to discrete inputs by adding them to the Discrete Inputs
table.
4.2.3.3 Network > Advanced Network > Remote Services Server (Configure remote
services server)
This is a new feature available with the X-600M. This feature is sometimes referred to as “web services”
and allows other ControlByWeb devices to initiate a connection to the X-600M instead of the other way
around. Once connected, the X-600M can communicate with these devices just as if it had established
the connection. The benefit of this method of communication is that the remote ControlByWeb devices
can bypass firewalls without any extra configuration of the local network. This also eliminates the need
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