Application; Connection With Modbus Tcp Utility - ICP DAS USA tWF-DA1PD2R1 User Manual

4. Application

Users can use a Computer or Smart Device to communicate with the tWF devices in
the application. It can complete the purpose of I/O control to wireless network by this way.
Figure 4-1: tWF + PC/Laptop/Smart Device application architecture

4.1 Connection with Modbus TCP utility

a. Open Modbus TCP utility and key in the IP address , Port as "502". Finally,
click the "Connect" button.
b. If the network settings are correct, this will immediately establish a
connection.
c. Use the function code "0x02", and set the Reference Number as "0x00", Bit
Count as "0x08" to get the 8 CHs DI value.
d. Use the function code "0x01", and set the Reference Number as "0x00", Bit
Count as "0x08" to get the 8 CHs DO value.
tWF-DA1PD2R1
tWF-DA1PD2R1 User's Manual
Figure 4-2: Digital Input reading
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