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08H:Diagnostic function<br />
The sub-function code 0000H is able to check communication signal between Master and Slaver. Data<br />
content is random value.<br />
Ex: Use the diagnostic function for ID=01H<br />
ASCII Mode<br />
Query PC Servo Response Servo PC (OK) Servo PC (ERROR)<br />
STX ‘ : ’ STX ‘ : ’ STX ‘ : ’<br />
ADR<br />
‘ 0 ’ ‘ 0 ’ ‘ 0 ’<br />
ADR<br />
ADR<br />
‘ 1 ’<br />
‘ 1 ’<br />
‘ 1 ’<br />
Function Code<br />
‘ 0 ’ ‘ 0 ’ Function ‘ 8 ’<br />
Function Code<br />
‘ 8 ’<br />
‘ 8 ’<br />
Code ‘ 8 ’<br />
‘ 0 ’ ‘ 0 ’ Exception ‘ 0 ’<br />
Sub- (HI)<br />
Sub- (HI)<br />
‘ 0 ’<br />
‘ 0 ’<br />
code ‘ 3 ’<br />
Function<br />
Function<br />
‘ 0 ’ ‘ 0 ’ ‘ 7 ’<br />
(Lo)<br />
(Lo)<br />
LRC<br />
‘ 0 ’<br />
‘ 0 ’<br />
‘ 4 ’<br />
‘ A ’ ‘ A ’ END1 (CR) (0DH)<br />
Data<br />
‘ 5 ’ Data<br />
‘ 5 ’ END0 (LF) (0AH)<br />
(word) ‘ 3 ’ (word)<br />
‘ 3 ’<br />
‘ 7 ’<br />
‘ 7 ’<br />
LRC<br />
‘ 1 ’ ‘ 1 ’<br />
LRC<br />
‘ B ’<br />
‘ B ’<br />
END1 (CR) (0DH) END1 (CR) (0DH)<br />
END0 (LF) (0AH) END0 (LF) (0AH)<br />
RTU Mode<br />
Query PC Servo Response Servo PC (OK) Servo PC (ERROR)<br />
ADR 01H ADR 01H ADR 01H<br />
Function Code 08H Function Code 08H Function Code 88H<br />
Sub-<br />
Sub-<br />
Exception<br />
(HI) 00H (HI) 00H<br />
Function<br />
Function<br />
code<br />
03H<br />
(Lo) 00H<br />
(Lo) 00H CRC(Lo) 06H<br />
Data A5H Data A5H CRC(Hi) 01H<br />
(word) 37H<br />
(word) 37H<br />
CRC(Lo) DAH CRC(Lo) DAH<br />
CRC(Hi) 8DH CRC(Hi) 8DH<br />
7-10
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