Inputs, Outputs, Internal Variables, Counters - LOVATO ELECTRIC DMED310T2 Manual De Instrucciones

CODE DESCRIPTION
INPx Digital inputs
OUTx Digital outputs
LIMx Limit thresholds
REMx Remote-controlled variables
PULx Energy count pulses
CNTx Counters
1 - Status of the limit variable
2 - Value of measurement
3 - Function
4 - Type of measurement

INPUTS, OUTPUTS, INTERNAL VARIABLES, COUNTERS

– The inputs and outputs of the expansion modules are identified by a code and a sequence number. For instance, the digital inputs are identified by code INPx,
where x is the number of the input. In the same way, digital outputs are identified by code OUTx.
– The DMED310T2 incorporates, in the base unit, one digital input in VAC (named INP1) and two static outputs (OUT1 and OUT2). The INP2 input is reserved for
future applications, it is not available and cannot be used.
– The numbering of I/O expansion modules, if installed, continues the numbering of built-in I/O, with a progression from left to right. For example, installing an
expansion module with two inputs and two outputs, these will be named INP3-INP4 and OUT3-OUT4.
– For every I/O, there is a dedicated setting menu that allows to specify functionality and properties.
– In a similar way, there are some internal bit-variables (markers) that can be associated to the outputs or combined between them. For instance, it is possible to
apply some limit thresholds to the measurements done by the multimeter (voltage, current, power, etc.). In this case, an internal variable named LIMx will be
activated when the measurements go out of the limits defined by the user through the dedicated setting menu.
– Finally, it is possible to manage up to 4 counters (CNT1..CNT4) that can count pulses coming from an external source (through a digital input INPx) or the
number of times that a certain condition has taken place. For instance, defining a limit threshold LIMx as the count source, it will be possible to count how
many times one measurement has exceeded a certain limit.
– The following table groups all the I/O and the internal variables managed by the DMED310T2.
– The status of each I/O or internal variable can be shown on the display in the dedicated page.
LIMIT THRESHOLDS (LIM)
– The LIMn thresholds are internal variables whose status depends on the out-of-limits of one particular measurement set by the user (e.g. total active power
higher than 25kW) among all those measured.
– To make the setting of the thresholds easier, since the limits can span in a very wide range, each of them can be set using a base number and a multiplier (for
example: 25 x 1k = 25000).
– For each LIM, there are two thresholds (upper and lower). The upper threshold must always be set to a value higher than the lower threshold.
– Their meaning depends on the following functions:
Min function: The lower threshold defines the trip point, while the upper threshold is for the resetting. The LIM trips when the selected measurement is less
than the lower threshold for the programmed delay. When the measured value becomes higher than the upper setpoint, after the delay, the LIM status is reset.
Max function: The upper threshold defines the trip point, while the lower threshold is for the resetting. The LIM trips when the selected measurement is more
than the upper threshold for the programmed delay. When the measured value decreases below the lower setpoint, after the delay, the LIM status is reset.
Max+Min function: Both thresholds are for tripping. When the measured value is less than the lower or more than the upper setpoint, then, after the respective
delays, the LIM will trip. When the measured value returns within the limits, the LIM status will be immediately reset.
– Trip denotes either activation or de-activation of the LIM variable, depending on 'Normal status' setting.
– If the LIM latch is enabled, the reset can be done only manually using the dedicated command in the commands menu.
– See setup menu M08.
REMOTE-CONTROLLED VARIABLES (REM)
– The DMED310T2 can manage up to 4 remote-controlled variables (REM1...REM4).
– These are variables which status can be modified by the user through the communication protocol and that can be used in combination with outputs.
– 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 DMED310T2 relays to drive lighting or similar loads.
G
B
RANGE (x)
1...4
1...4
1...4
1...4
1...5
1...4
5 - Upper threshold
6 - Threshold delay
7 - Lower threshold
7