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This follows manual Rev1.1, MAR./2020. AP mode fixes the address at 192.168.77.1 and supports one client. Coordinate with the owner without displacing an existing client. STA mode uses its assigned address on the existing Wi-Fi network.
On the owner-confirmed AP connection, enter 192.168.77.1 in your browser's address bar using the owner's current access instructions.
Use the current web account. The documented initial pair is admin / admin; Wi-Fi credentials are separate. The reviewed browser instructions do not specify a web scheme or port. Port 502 is Modbus TCP, not browser access.
Confirm AP versus STA mode
Ask the owner to verify the current mode, network/key and single-client limit before connecting. Use the assigned address for an existing STA connection; do not change modes to force this number.
Read the Status Bar
The main screen’s Status Bar shows firmware version, MAC address and IP address. Leave output controls, sliders, calibration, counters and setup unchanged.
If access fails
Recheck the current network and web password with the owner. Do not reset the controller, change its mode or manipulate wiring to obtain access.
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ICP DAS tWF-DA1PD2R1 User’s Manual Rev1.1