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AK
90003752(3) [AK-Commands] 11/03
1. Basic Informations
You can distinguish three cases:
(1) Exhaust analyzer system:
Some analyzers are combined logically. That means, these analyzers are connected with
the TBCC via an front-end computer (system computer). The communication does not
take place directly between the TBCC and the analyzers, but it will take place via the front-
end computer. The identification of each device resp. of the whole system will be done by
a channel number. K0 means the whole configured analyzer system ("assembling
command resp. assembling report"). Kn (n=1, nmax) means each physical available
analyzer. KV means the corresponding front-end computer.
Some analyzers and the sampling devices or systems (e.g. CVS equipment, particle
sampler, sampling system, etc.) are combined logically. That means, these analyzers are
connected with the TBCC via an front-end computer (system computer). The communi-
cation does not take place directly between the TBCC and the devices or systems, but it
will take place via the front-end computer. The identification of each device and system will
be done by a channel number. The handling of the analyzers will be like described above.
All the other devices or systems can only be called directly by the corresponding channel
number. The front-end computer must know the mnemonics of these devices and
systems. Furthermore, the front-end computer has to be able to send orders and read
commands to the channels resp. to send responses to the TBCC.
(2) Single exhaust analyzers (single channel analyzers):
All analyzers are connected to the TBCC individually. So, an identification of the analyzers
by the software would not be necessary, because the analyzers are identified by their
hardware connections. But to get a homogeneous protocol, the channel number will be
indicated with K0.
(3) Single exhaust analyzers (multi channel analyzers):
All analyzers are connected to the TBCC individually, but they measure more than a single
component (e.g. CO and C0
2
). The identification by the software is necessary, because it
will call the single channels resp. components. That is why such a single analyzer will be
treated like a system.