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QUESTION:
How to implement the LOGO! function Yearly timer in MicroWin ?
ANSWER:
The following library contains a block wich emulate this LOGO function.
Additional Features compared to the LOGO version:
- Date and Time supported
- minimum resolution is 1 minute
- up to 3 configurations per block
- the max. number of blocks are limited trough the CPU memory only
The Library "Logo functions V1.4" contains the new function "Yearly timer".
Other Function are already described in a previous entries, see links at bottom.
Description
The Yearly timer enableds you to influence a ouput at specific dates or date range.
(example: shutdown the plant on local holidays).
A single Yearly timer offers the possibility to parameterize up to 3 independent configurations,
which influence the same output.
LOGO! vs. S7-200.NET
LOGO:
The LOGO! yearly timer is only capable to select a specific day (or date range), so the
minimum resolution is 1 day. If you wish to switch something on a specific date and specific
time you would be forced to combine it with a yearly timer.
S7-200.NET:
The S7-200.NET yearly timer has a minimum resolution of 1 minute. This means
if you would switch something on a specific date and time you need only one yearly
timer and nothing else.
Example: 31.December 23:59h (12:59pm)
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