User Manual

Chapter 3 Utility Software 25
3.2.4 Modbus Configuration
Figure 3-8: Modbus Configuration Window
Lock the Configuration of Host
This option is enabled in order to protect all configuration settings from
being changed inadvertently. When this option is enabled, only the PC
with specified IP address (e.g. 172.20.20.2) is allowed to set the configu-
ration whereas other PCs will not be given the access right for configura-
tion and the option will be grayed out accordingly.
Modbus/TCP port number
The default port number of Modbus/TCP is 502. If you want to select the
port yourself, you can set it within the range of 512 to 50000. Note that a
port number below 512 is already reserved in each situation for other
specific uses and thus unavailable for your selection.
Modbus Serial Frame Timeout
RTU Frame Timeout
This option specifies the time duration in milliseconds for the ADAM-
4572 to wait for a response after it has issued a command while using
Modbus/RTU. After the timeout is expired and no response is received,
the ADAM-4572 will regard the command as failed. Note that the Time-
out for the host PC must be greater than the timeout setting here speci-
fied, otherwise an error will occur.