Serial Communications Protocol Specifications - Swissvacuum.com

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As already stated, note that if the microPLC is used on chambers different from Challenge and Hygros
(“standard chambers”), the meanings of some channels could be different from those reported here.
Whre the DCTC term appears it means that the corrispondent columns of values are relative to the “Salt
Fogs” systems.
READING AREA
The information in this area allows the user to know the general status of the system.
According to the application to be developed only a part of these information could be necessary.
Note that measures are multiblied by a factor whose value depends from the parameter. The factor is reported in each
table (for example: PT100 n. 0 * 100 means that in the memory location the value is the temperature measure for
PT100 number 0, multiplied by 100).
PT100 MEASURES
For Challenge/Hygros chambers the PT100 no. 0 is the probe of dry bulb, and the no. 1 is the probe of wet bulb.
Note that the PT100 n. 0 is also copied into locatios 2036-2037 (Calculated Input Measures).
ADDRESS MEANING
2000-2001 PT100 NO. 0 * 100
2002-2003 PT100 NO. 1 * 100
2004-2005 PT100 NO. 2 * 100
2006-2007 PT100 NO. 3 * 100
2008-2009 PT100 NO. 4 * 100
2010-2011 PT100 NO. 5 * 100
ANALOGIC INPUTS MEASURES
ADDRESS MEANING
2012-2013 Low stage suction * 1000
2014-2015 Low stage discharge * 1000
2016-2017 High stage suction * 1000
2018-2019 High stage discharge * 1000
2020-2021 Analogic input No. 4 * 1
2022-2023 Analogic input No. 5 * 1
2024-2025 Analogic input No. 6 * 1
2026-2027 Analogic input No. 7 * 1
2028-2029 Analogic input No. 8 * 1
2030-2031 Analogic input No. 9 * 1
CALCULATED INPUTS MEASURES
For standard chambers only 3 parameters are used. Note that the temperature reported below is the same value you can find in
the PT100 measures table at address 2000; in effect it is the dry bulb temperature.
Absolute humidity is the absolute value used by the chamber regulator to control the humidity in the chamber. It is normally not
useful to the operator: Relative humidity and Temperature globally identify the status of the chamber.
Serial communications protocol vers. 2.02 Angelantoni Industrie Spa Massa Martana (PG) Italy