User Manual

6.5.4 Display values and wiring test
The following values are displayed on the operator unit:
Main menu > Data acquisition > Calculator 1…2 >
D
isplay values
Operating lin
e Comment
Actual value –50... +9999 or –50.0... +999.9
Unit Max. 20 characters
Input A
Input B
Input C
 Consider possible number ranges of the result when writing a formula. Change
to another unit (e.g. kJ rather than J) if you can expect the result to be large.
Note
 Actual value Is an integer or floating point number depending on whether you
use integers (x, y, z) or floating point constants (u, v, w).
You can directly control the calculator during the wiring test.
Main menu > Commissioning > Wiring test > Outputs >
Wirin
g test
Operating lin
e Comment
[Calculator 1] ouput ---, 0...100 %
[Calculator 2] ouput ---, 0...100 %
6.5.5 Troubleshooting
The result and thus the calculator output is set to 0 if an input signal required for
calculation is not available during operation.
User-defined formulas are checked for conformity to rules (see Section 6.5.1). A
config
uration alarm is displayed when a formula contains errors.
W
rong formulas
W
rong formulas Error description
AB* 2 variables without operator.
A*/B 2 operators.
A*((B-C) Final parenthesis missing.
A*(((B-C)-x)-z) Max. 2 same parentheses in sequence.
Examples for
wrong
formulas
No. Text Effect
6401 [Calculator 1] formula invalid Non-urgent message; must not be
acknowledged.
6402 [Calculator 2] formula invalid Non-urgent message; must not be
acknowledged.
Fault messa
ges
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Siemens Switching and monitoring device RMS705B CE1P3124en
Building Technologies Data acquisition 01.04.2010