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{S}
is the Start of Message character L (Hex 4C) or R (Hex 52).
L is used for Controllers; R is used for Profilers.
{N}
is the slave device address (in the range 1 - 99); addresses 1 - 9 may be represented
by a single digit (e.g. 7) or in two-digit form, the first digit being zero (e.g. 07).
{P}
is a character which identifies the parameter to be interrogated/modified.
{C}
is the command (Refer to
information for each Model Group
#
indicates that {DATA} is to follow (Hex 23)
{DATA}
is a string of numerical data in ASCII code (refer to the Data Element table below)
P
is the Program Number
S S
is the Segment Number (01 to 16)
*
is the End of Message Character (Hex 2A)
No space characters are permitted in messages. Any syntax errors in a received message
will cause the slave instrument to issue no reply and await the Start of Message character.
Table 35. ASCII Data Element – Sign/Decimal Point Position
{DATA} Content
abcd0
abcd1
abcd2
abcd3
Abcd5
Abcd6
Abcd7
Abcd8
(in the Data Content, abcd represents the data value, the last digit indicates data format)
Type 1 Message
L {N} ? ? *
This message is used by the master device to determine whether the addressed slave
device is active.
The reply from an active slave is
L {N} ? A *
An inactive device will give no reply.
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Table 34. ASCII Parameter Key
the Serial Communications Application Layer
)
Data Format
Positive value, no decimal place
+abcd
Positive value, one decimal place
+abc.d
Positive value, two decimal places
+ab.cd
Positive value, three decimal places
+a.bcd
Negative value, no decimal place
- abcd
Negative value, one decimal place
- abc.d
Negative value, two decimal places
- ab.cd
Negative value, three decimal places
- a.bcd
ASCII Communications
/
- DIN Controllers & Indicators - Product Manual
16
Description
59305, Issue 5 – March 2005
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