Festo MTR-DCI-...IO Series, Description, Page: 145 / 182

B. Supplementary information
B-9
Festo P.BE-MTR-DCI-IO-EN en 1209d
Note
The following applies when the objects are written:
– Discrete values:
A non-permitted value will not be accepted, the previ-
ously valid value will be retained.
– Concrete values (e.g. lengths, speeds, etc.):
A non-permitted value will be limited up to the next
permitted minimum or maximum value.
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)