Parameter data transfer
Examples of parameter data telegram
10
l
79
EDSMF2178IB EN 3.0
Read block parameters
The software product code (code C0200) of the Lenze 8200 vector is to be read from
parameter set 1. The product code has 14 alphanumerical characters. They are transferred
as block parameters. The transfer of block parameters uses the entire data width (2nd to
8th byte).
During user data transfer, the command byte (1. Byte) contains the entry 0x40 or 0x41 to ...
– be able to signalise the end of the block transfer;
– request the next block.
ƒ C0200 − request
Command Index
Low byte
Index
High byte
Subindex Data 1 Data 2 Data 3 Data 4
0x40 0x37 0x5F 0x00 0x00 0x00 0x00 0x00
Byte 1: 0x40, "Read request" (requirement to read a parameter from the controller)
Byte 2/3: Index low/high byte: 24575 − 200 − 0 = 24375 (0x5F37)
ƒ Response including the block length (14 characters)
Command Index
Low byte
Index
High byte
Subindex Data 1 Data 2 Data 3 Data 4
0x41 0x37 0x5F 0x00 0x0E 0x00 0x00 0x00
Byte 1: 0x41, "read response". The entry 0x41 implies that it is a block diagram.
Byte 2/3: Index low/high byte: 24575 − 200 − 0 = 24375 (0x5F37)
Byte 5: 0x0E = data length of 14 characters (ASCII format)
ƒ First data block − request
) Note!
The single blocks are toggled*, i.e. at first it is requested with command 0x60
(0b01100000), then with command 0x70 (0b01110000), after his again with
0x6 etc.
The response is sent accordingly. It is alternating because of a toggle bit. The
process is completed by command 0x11 (bit 0 is set, see below).
*Toggle−Bit = bit 4 (starting with "0")
Command Index
Low byte
Index
High byte
Subindex Data 1 Data 2 Data 3 Data 4
0x60 0x00 0x00 0x00 0x00 0x00 0x00 0x00
Byte 1: 0x60
,
"Write response" (acknowledgement) with access to bytes 2 ... 8.
ƒ Response
Command Index
Low byte
Index
High byte
Subindex Data 1 Data 2 Data 3 Data 4
0x00 0x38 0x32 0x53 0x38 0x32 0x31 0x32
Bytes 2 ... 8, ASCII format: 8 2 S 8 2 1 2
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