Remote-Controlled Variables; Larms; Tariffs; Data Logger Function - LOVATO ELECTRIC DMG800 Manuel D'application

REMOTE-CONTROLLED V RI BLES (REM)
– DMG800 can manage up to 8 remote-controlled variables (REM1...REM8).
– Those are variables which status can be modified by the user through the communication protocol and that can be used in combination with outputs,
Boolean logic, etc.
– Example: using a remote variable (REMx) as a source for an output (OUTx), it will be possible to freely energise or de-energise one relay through the
supervision software. This allows to use the DMG800 relays to drive lighting or similar loads.
– nother possible use of REM variables is to enable/disable other functions remotely, inserting them into a Boolean logic in ND with inputs or outputs.
L RMS ( L )
– The user has the possibility to define a maximum of 8 programmable alarms ( L 1... L 8).
– For each alarm, it is possible to define the source that is the condition that generates the alarm, and the text of the message that must appear on the screen
when this condition is met.
– The condition that generates the alarm can be, for instance, the overcoming of a threshold. In this case, the source will be one of the limit thresholds LIMx.
– If instead, the alarm must be displayed depending on the status of an external digital input, then the source will be an INPx.
– With the same criteria, it is possible to also link complex conditions to an alarm, resulting from the logic combination of inputs, limits, etc. In this case, the
Boolean logic variables BOOx must be used.
– For every alarm, the user can define a free message that will appear on the alarm page.
– It is also possible to define a priority for the alarm. If it is a simple indication, then the priority can be set to low. In this case the icon that follows the
message will be the 'info' symbol.
– If instead, the alarm must indicate a more critical situation, then setting its priority to High, the message will be displayed with the 'Warning' icon, and when
the alarm becomes active, the display page will move automatically on the larm screen.
– When several alarms are active at the same time, they are displayed sequentially, and their total number is shown on the status bar.
– To reset one alarm that has been programmed with latch, use the dedicated command in the commands menu.
– For alarm programming and definition, refer to setup menu M09.
1 - larm no. / total alarm count
T RIFFS
– For the Energy billing, the DMG800 can manage 4 different tariffs in addition to the total and partial Energy meters.
– The tariff selection is made by external digital inputs, and is thus conditioned by the use of an EXP expansion module provided with digital inputs. To select
among the 4 tariffs, the two input functions T R- and T R-B must be used. Their binary combination selects the tariff as shown in table:
T R-
OFF
ON
OFF
ON
– If the synchronise input for the power integration is used, then the tariff change becomes active when the sync signal triggers it; otherwise the tariff change
takes place immediately when the status of the selecting inputs changes.
– The tariffs, each with 5 meters (active energy imported/exported, reactive imported/exported, apparent) are shown on a dedicated page, following the total-
partial energy screen.
– If the DMG is equipped with a communication port, then it is possible to select the active tariff through the dedicated command via modbus protocol (see
technical instruction for modbus protocol).
1 - ctive tariff
2 - Viewed tariff
D T LOGGER FUNCTION
– To activate the data logger function the DMG must be equipped with a EXP1030 or EXP1031 memory module.
– To configure the data logger it is necessary to use the PC software DMK-DMG Data logger (code DMKSW10) , that allows to select the variables and
recording modes and to download data in the form of a MS- ccess
– The data logger allows to store at regular intervals up to 32 variables chosen freely among the multimeter measures.
– For each one of these variables it is possible to store:
1. The instantaneous value that the variable had at the moment of sampling.
2. The average value that the variable had in the sampling period.
3. The maximum value that the variable reached in the sampling period.
4. The minimum value that the variable reached in the sampling period.
– Every record is marked with a time stamp taken from the real-time clock of built in the module. The minimum sampling period (distance between two
records) is of 1 second.
– Considering the amount of memory (8 Mbytes), the number of variables to be stored and the sampling period, the PC software indicates the time that must
elapse before the flash memory is completely filled.
– The recording can be continuous (driven only by regular time intervals) or conditional, driven by the status of one of the internal bit-variables (limits, alarms,
Booleans etc.). In this case it is possible to define which variable controls the starting/stopping of the recording.
– When the memory is full, the user can choose to stop the recording (STOP mode) or to continue overwriting the oldest records (LOOP mode).
– The display page dedicated to the data logger status shows all the fundamental information, like number of measures, available free memory, residual time
before the memory is filled (Note: the last two data are not shown when working in LOOP mode).
1 - Time left before end of memory, expressed
in days or in hh:mm:ss if less than 1 day.
2 - Datalogger status and number of measures
3 - Recording status
4 - Sampling period
5 - Percentage of free memory
T R-B
OFF
OFF
ON
ON
®
database table.
G
B
T RIFF
1
2
3
4
9