LumaSense Technologies INNOVA 1309 - Manual (Page 24)

Chapter 3
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BE1285-15 1309 Multipoint Sampler LumaSense Technologies A/S
Page 24 of 42
Numerical data for interface jobs sent to the 1309 can be in NR1, NR2
or NR3 form. This is a format for describing how the numerical data is
represented, for example:
NR1 data: 250 (number without decimal fraction or exponent)
NR2 data: 249.85 (number with decimal fraction, without expo-
nent)
NR3 data: 2.499E-2 (number with fraction and exponent).
Generally, any of these data formats can be used, unless specifically
stated otherwise in the interface job overview given in section 4.2 .
The number of characters in the non exponent part of the data field
must not be greater than 8.
Job Terminators
Each interface job must have a terminator (signified by T
e
in Fig.3.1 )
which tells the 1309 that it has received the complete interface job.
When the 1309 receives the terminator, it checks the whole job and, if
it is a valid job, carries it out.
The terminator for communication with the 1309 is an ASCII control
character, such as “LF”. This is the default terminator character used in
communication with the 1309. The terminator character can be
changed, as follows.
To select a terminator character other than the default, use the inter-
face job Define_Terminator, followed by the decimal value of the char-
acter you wish to use. The possible terminator characters, with the cor-
responding decimal values, are shown in Table 3.1.
DEF_TERMINATOR 3<LF> Selects the control character ETX
(decimal value 3) as the terminator
character.
All of the following interface job examples assume the use of “LF” as
the terminator character.