Cannot Read And Clear - Waveshare RS485 TO ETH Manual

485 TO ETH (B) User Manual
The format of the last uploaded data is as follows, among which the workshop_id is
read from the Modbus register.

3.8. CANNOT READ AND CLEAR

When a register cannot be read, a data value of 0 can be used to indicate that the data
has not been read.
Figure 21 Step 1.1.3
Figure 22 Clear data
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