Festo MTR-DCI, Manual

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B. Supplementary information
B−8
Festo P.BE−MTR−DCI−IO−EN en 0606b
READ (R) Read commands (R) transfer a value from the MTR−DCI. The
reply from the MTR−DCI controller contains the value read. A
checksum <PS> will be inserted in front of the <CR>.
All commands are entered as a character sequence without
any empty spaces. A hex character corresponds to a Char
character in hex format.
Acc Command Reply
W =IIIISS:<value>CR =IIIISS:<value> <PS> <CR>
R ?IIIISS<CR> =IIIISS:<value> <PS> <CR>
W = write
R = read
Syntax Explanation
=", ?" Starting character for Write or Read commands
IIII Index in 4 hexadecimal figures (4H)
SS Subindex in 2 hexadecimal figures (2H)
If the addressed Object does not have an indexed
parameter, subindex <00> will be specified.
:" Separating character
<Value> Data in a format depending on data type
<PS> Checksum in 2 hexadecimal figures (2H)
<CR> End character <Carriage Return> ($0D)
<Value> The transferred value (1, 2 or 4 data bytes) depends on the
data type of the Object to be read or written (see section
B.1.4).