Math Configuration; Math Block Description; Typical Math Block; Operators - ABB SM2000 User Manual Supplement

Videographic Recorders
SM1000 and SM2000

2 Math Configuration

2.1 Math Block Description

Note.
Up to twelve Math Blocks, configured individually
using the 'Math Pad' – see Fig. 2.2, page 7.
Each Math result has its own Long and Short Tags
and Engineering Range
Up to 18 different preset functions – see Table 2.4,
page 6
Constants up to three decimal places
Maximum equation length – 40 characters
Up to three digital signals per equation
Individual recording channel signals, analog and digital sources
can be combined in a Math Block to produce a customized
recording channel or retransmission source.
Typical examples include adding/subtracting the values of a
number of analog sources together to form one recording
channel.
More complex blocks can also be implemented that determine
relative humidity, mass flow or zirconia oxygen concentration.
Digital signals can be used in Math Blocks to enable/disable the
output when certain conditions are true.
IM/SM2000ADV Issue 7
2.2 Typical Math Block – Fig. 2.1
Each math block comprises any number of sources, constants,
operators and functions, to a maximum length of 40 characters,
– see Fig. 2.1, page 4.
Possible operators, sources and functions are listed in Tables
2.1 to 2.4.
2.3 Operators – Table 2.1
Operator Description
+ Add
* Multiply
Table 2.1 Operators

2.4 Constants

Math blocks may contain any number of constants, each with a
limit of three decimal places, up to the maximum of 40
characters for the whole block. The maximum range of each
constant is 9999 to – 999
2 Math Configuration
Operator Description
– Subtract
/ Divide
3