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11. Data Readout via Serial Interface
All register codes from section
10
are also available for serial readout by PC or PLC. For
communication the FU252 converter 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 converter:
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 frequency of input A
(code :9) from a unit with unit address 11:
ASCII Code:
EOT
1
1
:
9
ENQ
Hex Code:
04
31
31
3A
39
05
Binary Code:
0000 0100
0011 0001
0011 0001
0011 1010
0011 1001
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.
Fu252_02g_oi_e.doc / Apr-16
Page 31 / 36
www.hohner-elektrotechnik.de
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