INFICON STC-2002 Thin Film Deposition Controller Operating Manual - Manual (Page 153)

p STC-2002 DEPOSITION CONTROLLER y
SECTION 5.XX e page 151 of 276 ^
Terms and Definitions
State
A testable condition of the STC-2002. Examples of states are stopped, deposit, manual, idle, etc. A state does not have anything to
do with time (see Edges). See Section x5.3
Event
An event can be either triggered or tested. It is normally an internal occurrence in the STC-2002. Examples of events are zeroing,
reaching the final thickness limit, etc. An event is triggered by an Edge.
see Section x5.3
Boolean
A Boolean state can take on only one of two values, commonly referred to as True (on) and False (off). See Section x5.2
Scalar
A variable with a range of 0...N. Also, a special non-Boolean type of scalar whose set is {0,1}. See Section x5.2
Bit Map Scalar (combined bit weights)
A variable whose constituent parts are independent Boolean values combined in a single variable entity. See Section x5.2
AND, OR, NOT
These are logical operators. 'ANDing' can be thought of as relays in series, 'ORing' as relays in parallel, and 'NOTing' or
complementing as using the normally closed contacts instead of the normally open ones. (for complications of, see section x5.4) See
Section x5.2
Arithmetic
The Arithmetic operators included are: multiply, divide, add and subtract.
Relational
The relational operators included are: greater than, less than and equal to.
Selection
This is a type of IF... THEN... ELSE conditional operator. If something is true, then use value A, if something is not true then use
value B. The selection is between two values (values A or B) and is based upon the truth or falsity of the main argument (something).
Input Function
This is the manner in which states and events are tested or examined. All states and events are examined or read with the same 'I'
input function. See Section x5.5
Output Function
Manner in which relays and events are set or triggered. By providing several different types of output functions, counters and shift
registers can be implemented. See Section x5.6
Table 5.1: Glossary Of Terms continues on following page...