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4.7.3 TOU Calendars
The PM295 TOU calendars cover two full years with a one day resolution. For each
day, one of the 16 daily tariff profiles can be applied.
4.7.4 Daily Profiles
The PM295 provides up to 16 different daily profiles (types of days), each with up
to 8 tariff change points per day. The daily start time for each tariff can be specified
with a 15 minute resolution.
4.7.5 Connecting with Energy-counting Meters
The PM295 is capable of sensing pulses via its discrete inputs from up to eight
external energy-counting meters and to count them in a single or in eight different
energy registers connected to the Time-of-Use System, using the same sixteen-tariff
scheme.
4.7.6 Tariff Interval Pulse
The PM295 can indicate the beginning of a tariff time interval by a timing pulse
through the instrument' s relay output.
Starting a new tariff interval is also considered to be an internal event, that can
trigger setpoint operation, for instance, in order to synchronize self-readings (data
recording) with beginning of a new tariff, or to indicate the beginning of a tariff time
interval by energizing the appropriate relay.
4.8 Discrete Input Operation
The PM295 has eight optically isolated discrete inputs that can be configured by the
user to sense external contact status or pulses provided by the external sources.
Each input is connected to a separate status or pulse latch to sense input level status,
or level transition. The function of each discrete input is programmed by the user.
Status Inputs
To be recognized by the instrument, the new input status level (open/closed) should
be asserted for at least 50 ms.
Either status input can be monitored via the front panel or communications, and
used as a trigger for setpoint operation. Up to four status inputs from #1 to #4 can
be used as a selector of the output channel for the multiplexed analog output (see
70
Operation Techniques
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