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11- Channels and parameters
11�1�6 Running times in databases
You might be interested in nding out how
long the pump runs every day. To do this you
will need another channel that obtains today's
counter setting, subtracts yesterday's value and
stores the dierence in the database. There is
no automatic way of doing this – you have to
change the settings manually.
Start by selecting an unoccupied channel. Give
it the name d_Running time circ. pump. Set the
channel unit = h (hours). Set a suitable number
of decimals.
Open Advanced settings for the channel. Set
the scale = 1 and oset = 0. Set the connection
type = Channel. Set connection number = 104
(pump running time).
Select the math function DB change. Click OK.
You now need to add this channel to the database manually.
Open Settings/Advanced/Databases.
Select the day database.
Click on the rst uncongured database object and choose "d_Running time circ.pump" and click
OK. A prompt appears warning you that all the data in the day database will be erased. If this is not
OK, you should click Cancel and export the day database before continuing. Find out how to do this
in 10.1.3. Important: You will not be able to re-import the database to the device if you have
changed the database settings�
11�1�7 Deleting channels
Channels cannot be deleted if they are device I/O channels or if they are used by a script. There is a
delete eld on the right of each channel eld, containing a checkbox or a line. To delete the chan-
nel, check the box and click Save. Take care when deleting channels. When you delete a channel
it reverts to its original name, e.g. Channel 105. In the example below, the channel on top can be
deleted but not the one on the bottom.
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