Aaeon TKS-G21-CV05 Bedienungsanleitung PDF herunterladen (Seite 22)

Embedded Box TKS-G21-CV05

Chapter 2 Quick Installation Guide 2 - 8

5 TXD+ 6 N/C

7 RXD- 8 N/C / +5 Volt. / (+12 Volt.)

9 Ground 10 N/C

RS-485 Mode

Pin Signal Pin Signal

1 TXD- 2 N/C

3 N/C 4 N/C

5 TXD+ 6 N/C

7 N/C 8 N/C / +5 Volt. / (+12 Volt.)

9 Ground 10 N/C

Note:

Issue: COM port limitation for the speed test during the communication.

Root Cause:

In serial communication, data bits received at the serial port are bundled

into a byte and transmitted into the serial port hardware buffer. From the

buffer, the byte is sent into the CPU. If a new byte arrives before the byte

in the buffer is moved into the CPU, a Hardware Overrun Error occurs.

Solution:

1. Try hardware handshaking.

2. See if the UART is an older un-buffered version or a new buffered

UART (such as a 16550A or 16750). You should use a buffered UART

for the reasons discussed above.

3. Change the Receive (Rx Trigger) buffer to 8, 4, or 1 (1 is a last resort).

4. For the product, the speed setting of Series Port (COM) is under

9600bps.

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Aaeon TKS-G21-CV05 Bedienungsanleitung Seite 22