[Question]Modbus Read command issue DMG10600C070_03WTC

紫狐

The software program is OK, so we can only replace the hardware part for testing. Let's take a look at the adapter board. Also, connect TX4 to the adapter board RX, RX4 to TX, and GND to GND。

vas_teplocom

紫狐 发表于 2026-7-20 19:48
The software program is OK, so we can only replace the hardware part for testing. Let's take a look  ...

I already have it set up that way

ZVIP7679

You can try again by using a different adapter. At present, it seems that the communication command process is correct.
The current situation is as follows: The instructions sent by the screen can be received by the machine side; however, the screen does not seem to receive the response instructions from the machine. Therefore, it is still necessary to check if there is any problem with the RX4 section of the screen.

vas_teplocom

ZVIP7679 发表于 2026-7-20 20:38
You can try again by using a different adapter. At present, it seems that the communication command  ...

How I can check RX4 section?

紫狐

You can use an oscilloscope to directly observe the signal of the RX4 pin of the T5L chip on the screen. First, look at the wiring port on the screen, and then look at the chip.