Metrohm tiamo 1.0 Manual - Manual (Page 76)

52 General program functions
Miscellaneous functions
Case
Syntax
y = Case(condition ; Value_true ; Value_false)
y = Case(condition ; Value_true ; Value_false ; Value_error)
Returns Value_true if the condition is true. Otherwise Value_false will be re-
turned. If an error occurs in the condition (Result " invalid ") then Value_error
will be returned.
Parameters
Condition Number
Any Variable (type numb er) can be entered here, or a Compare or logic op-
eration can be carried out whose operators are either adopted directly or
transferred as a Variable. This could be of the type Text , Number or
Date/Time ( Time() ).
Value_true
If the Condition <> 0 then this parameter will be saved as the result of the
function.
This parameter can either be transferred directly or as a Variable and can
be of the type
Text , Number or Date/Time ( Time() ). Complete Operations
can also be transferred here.
Value_false
If the Condition = 0 then this parameter will be saved as the result of the
function.
This parameter can either be transferred directly or as a Variable and can
be of the type
Text , Number or Date/Time ( Time() ). Complete Operations
can also be transferred here.
Value_error
If the Condition = invalid then this parameter will be saved as the result of
the function.
This parameter can either be transferred directly or as a Variable and can
be of the type
Text , Number or Date/Time ( Time() ). Complete Operations
can also be transferred here.
Examples
Case('MV.ID1' = "";"ID1 empty";"ID1 not empty") = if in the Sequence win-
dow no entry has been made for ID1 then in the result the text " ID1 empty "
will appear, otherwise " ID1 not empty " will be saved.
Case( 'DET pH 1.EP{1}.VOL';'DET pH 1.EP{1}.VOL';0;0) = if in the titration DET
pH 1 an endpoint has been found for which the volume is not 0 ( Value_true )
then this will be saved as the result. If EP1 is at 0 exactly then 0 will be re-
turned. If no endpoint has been found then 0 will also be saved as the result
of this function.
Case('RS.InterRes' > 5.5;"Intermediate result too high";'RS.InterRes' *
26.5;"error occurred")
= if the the result " InterRes " is larger than 5.5 then the
text " Intermediate result too high " will be written in the result, otherwise the
intermediate result will be multiplied by 26.5. If in the comparison
( 'RS.InterRes' > 5.5 ) an error occurs then " Error occurred " will be saved as the
result of this operation.