FM26001c_e.doc / Nov-11
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9. Appendix
9.1. Serial Communication Protocol
All registers are also available for serial readout by PC or PLC. For communication the unit uses the
Drivecom Protocol according to ISO 1745. All protocol details can be found in our manual
SERPRO_2a.doc which is available for download from our homepage
To request for a data transmission you must send the following request string to the unit:
EOT
AD1 AD2 C1 C2 ENQ
EOT = control character (Hex 04)
AD1 = unit address, High Byte
AD2 = unit address, Low Byte
C1 = register code, High Byte
C2 = register code, Low Byte
ENQ = control character (Hex 05)
The following example shows the request string for readout of the actual Factor1 setting (code 00)
from a unit with unit address 11:
ASCII Code:
EOT
1
1
0
0
ENQ
Hex Code:
04
31
31
30
30
05
Binary Code:
0000 0100 0011 0001 0011 0001 0011 0000 0011 0000 0000 0101
After a correct request, the unit will respond:
STX C1 C2 x x x x x x x ETX BCC
STX = control character (Hex 02)
C1 = register code, High Byte
C2 = register code, Low Byte
xxxxx = readout data
ETX = control character (Hex 03)
BCC = block check character
For all further details see SERPRO_2a.doc.
