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GA 09.035/6.02 - 07/2011 - © Oerlikon Leybold Vacuum
Computer interface
6.2.5
Number formats
The following data is always stored in the exponential format in the Multi-
Channel Controller:
Pressure values
Offset values
Threshold values
Output
The above data is always output in the exponential format. A five-digit man-
tissa and a two-digit exponent are used. Both parts of the number may contain
a sign.
Symbolic representation: ±a.aaaaE±aa
Example: 1.2500E-01
In the case of logarithmic transmitters (TTR, PTR, ITR) the last two digits of
the mantissa are always zero. Linear transmitters (CTR) use all digits of the
mantissa.
Input
The above data may be input either in the exponential format or in the fixed
point format. The input data is automatically converted to the exponential for-
mat by the unit.
Example: 1.25E-1 and 0.125 are both valid input data.
6.2.6
Continuous transmission of measurements
After the unit has been switched on, it starts to continuously send measure-
ments to the serial interface. By default one set of measurements is sent every
second.
The continuous measurement transmission stops when the Host sends a
character to the serial interface. The transmission can be resumed with the
COM command. See Chapter 6.3.4 COM,
