Carlo Gavazzi WM4-96 - Manual (Page 24)

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24
Programming
VT-CT ratio
19
Digital inputs programming
17
26
33
Example 1: measure of all the instantaneous variables,
energies and gas + night gas. Proceed as follows: install the
analogue measuring module (AQ1018 or AQ1019), select
MEASURE in the INPUTS menu and enable the AQ1042 dig-
ital inputs module (that must be installed) by setting A1 ON,
A2 ON (GAS TARIFF), A3 OFF.
Example 2: measure of energies, powers dmd and PF’s
dmd, as well as remote management of the tariff periods from
the digital inputs. The instrument is to be equipped with 2 digi-
tal input modules (AQ1042 slot A and AQ1038 slot C or 2x
AQ1042 slot A and C), while the analogue measuring module is
not necessary; to enable the 2 modules, set the instrument as
follows: A1 OFF, A2 OFF, A3 ON, C1 ON, C2 ON, C3 ON. Then,
set the full scale in the SYSTEM menu according to your plant.
Every modification to the measuring mode will
reset the meters.
T
IME PERIODS SELECTION MODE
C
HANNEL
3
SLOT
A C
HANNEL
3
SLOT
C A
CTION
Open Open Tariff 4
Open Close 2 Winter / 3 Summer *
Close Open 1 Winter / 2 Summer**
Close Close Tariff 4
C
HANNEL
2
SLOT
A (if A2 enabled as GAS): Close = day-time
tariff GAS is selected. Open = night-tariff GAS is selected.
* WM4-96 associates to the meter tariff 2 in Winter and
tariff 3 in Summer.
** WM4-96 associates to the meter tariff 1 in Winter and
tariff 2 in Summer.
When the tariff mode managed by the digital inputs (A3 and
C3 enabled “ON”) is selected, the user can no longer select
the tariffs in the energy meters menus, but only the seasons.