-134-
received, each device decodes to determine whether it is sending to themselves. After the
last transmitted characters, a pause of at least 3.5-character time marks ending the
message. A new message can start after this pause.
Whole message must be transmitted as a continuous stream. If there is apause time
over 1.5 a character before completion, receiver will refresh and assumes that next byte is
address domain of a new message. Also, if a new message starts within a time interval of
less than 3.5 character after previous message, receiver will regard the new message
ascontinuation of previous message. This will led to an error, because at last the CRC
domain value will be wrong.
RTU frame format:
Frame START
At least 3.5 character time
Slave address ADR
Communication address:0~247
Command code CMD
03:Read slave parameter ; 06:Write slave parameter
Data content DATA(N-1)
Information:function code parameter address, function code
parameter quantity, function code parameter value etc.
Data content DATA(N-2)
………………………
Data content DATA0
CRC CHK High place
detection value:CRC value
CRC CHK Low place
END
At least 3.5 character time
CMD(command instruction) and DATA(description).
Command code:03H, read N words (max 12 words)
For example:Slave address is 01, start address is P0.02, continously read 2 value.
Master command information
ADR
01H
CMD
03H
Start address high place
F0H
Start address low place
02H
Registar number high place
00H
Registar number low place
02H
CRC CHK low place
CRC CHK value
CRC CHK high place
Slave response information
Summary of Contents for DLB1-0D40S2G
Page 11: ...11 Graph 1 722 30KW product outline dimensions Graph 1 837 55KW product outline dimensions...
Page 12: ...12 Graph 1 875 110KW product outline dimensions Graph 1 9 132 160KW product outline dimensions...
Page 14: ...14 2 Wirings 2 1 Standard wiring diagrams Graph 2 8 0 4 18 5KW inverter wiring diagram...
Page 15: ...15 Graph 2 922 400KW inverter wiring diagram...
Page 159: ...159...
