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6.5.4
Display values and wiring test
The following values are displayed on the operator unit:
Main menu > Data acquisition > Calculator 1…2 >
Display values
Operating line
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 >
Wiring test
Operating line
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
configuration alarm is displayed when a formula contains errors.
Wrong formulas
Wrong 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 messages
59 / 216
Siemens
Switching and monitoring device RMS705B
CE1P3124en
Building Technologies Data
acquisition
01.04.2010