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ALPHA-VISION® Function of the Event-Archive Server: Arch_ValueOld
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Arch_ValueOld
SUMMARY
Arch_ValueOld - Old value
SYNTAX
Arch_ValueOld(
<CursorId>);
ARGUMENTS
- CursorId
-
Identification of the Archive Entry
RETURN VALUE
new measuring value / limit / delay time; depending on the entry type
DESCRIPTION
Query of the previouse (=old) Measuring Value of the wanted archive entry.
EXAMPLES
Arch_ValueOld($ACT);
Syntax Notation
- [aaa]
- aaa is optional (zero or one occurences)
- (aaa|bbb)
- aaa exclusive or bbb
- (aaa)*
- aaa may occur indefinitely often or may be omitted
- (aaa)+
- aaa may occur indefinitely often but at least once
- (aaa)m..n
- aaa may occur from m to n times