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11- Channels and parameters
11 Channels and parameters
11�1 Channels
All the variable data in the WMPro is handled by channels. There are
200 channels – 44 of them are used for the inputs and outputs, and one
is used for the status indicator. The other 155 channels are unoccupied,
so they can be used by scripts, databases, etc. Unoccupied channels
have the name Channel followed by a number. Channels usually have
the value 0 after a restart, so even though it is possible to write to chan-
nels, you will probably not need to do so.
11�1�1 Conguring channels
The rst 44 channels are linked to the physical inputs and outputs of
the WMPro. When you congure inputs and outputs as described in
section 5, the name, settings, databases, etc. are copied to the channel
list. You can speed up the process by working directly in the channel
list. To make changes to the channel list, you need to be logged in as
"cong". Open the channel list by clicking Settings/Advanced/Chan-
nels.
You can now specify the name, unit, the number of decimal places and
whether you want to save the channel in a database. The hour and day
databases have three extra options: mean, minimum and maximum
value during the period. If you move the mouse pointer over the eld,
you will see an explanation. When you add a channel to an hour or day database, a new channel is
created specically for the database. This new channel is automatically linked to the channel being
measured.
Digital inputs 1-4
44 channels are reserved for I/Os
even though there are only 40
physical I/Os. Digital inputs 1-4
can measure frequency as well as
counting pulses. That is why these
channels need to be congured
twice.
All variable data in the WMPro is handled by channels. There are 200 channels, of which the rst
44 are reserved for the I/Os. Parameters store data that can only be changed by the user.
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