Siemens SIMATIC ET 200SP CM 1xDALI - Page 15

CM 1xDALI communication model
2.3 Sending/receiving CM commands
ET 200SP CM 1xDALI Communication Model Description
Programming Manual, 12/2019, A5E47581955-AA
15
3. Input data over Process image to query the level of a control gear
Byte
Value
Description
0
16#02
Command index: it must be different with the previous command.
1 16#A0 Version: it must be 16#A0.
2 16#E9 Checksum: the total length of this command is 5 bytes, so the calculation is:
(byte 3 + byte 4 + … + byte 15) XOR 16#FF = 16#E9.
3 16#05 Length: total length of this command. Byte 0 is the command index and is not
counted in.
4 16#01 Bit 7: always 0 from CPU
Bit 6 to 0: Command ID. 1 is “query level”.
5 16#10 Input parameter – short address: query the control gear whose short address
is 16.
6
16#00
Not used in this command
7
16#00
8
16#00
9
16#00
10
16#00
11
16#00
12
16#00
13
16#00
14
16#00
15
16#00