Appendix
8-23
L _^ONMObk
8.3.3 SEND
The command SEND is to transmit data from the master to the slave. The master then sends a
telegram with the following structure:
EOT AD1 AD2 STX C1 C2 V1 ... Vn ETX BCC
The abbreviations have the following meanings:
EOT (04
hex
) End of the (previous) transmission
AD1, AD2 Logic unit address of the slave to be addressed
Slaves
STX (02
hex
) Start of text
C1, C2 Code number (two ASCII characters)
V1 to Vn Parameter value (n ASCII characters)
ETX (03
hex
)Endoftext
BCC Block-check character (00 ¼ FF
hex
)
Inthetext sectionof thetelegram, whichis embedded between thecontrol characters STXand ETX,
the code number (C1, C2) and the corresponding parameter value (V1 to Vn)are transmitted to the
slave.
Example for a SEND telegram
The maximum speed (code number C11)is to be set to the value 95.2 Hz via the bus address 34 at
the controller.
The host must send the following SEND telegram:
EOT 3 4 STX 1 1 9 5 . 2 ETX BCC
The controller can respond with two different acknowledgements:
ACK
The command could not be processed correctly. The current value of the parameter C11 is 95.2 Hz
or
NAK
The request could not been processed correctly. The parameter value was not changed.
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