Limit Thresholds (Limx); Remote-Controlled Variables (Remx); User Alarms (Uax) - Icar RPC 8BGA Manuel Complet

ICAR PQS
COD DESCRIPTION
INPx Digital Inputs
OUTx Digital Outputs
COMx Communication ports
AINx Analog Inputs
AOUx Analog Outputs
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 system (voltage, current, power, etc.).
In this case, an internal variable named LIMx will be activated when the measurements will go outside the limits defined by the
user through the dedicated setting menu.
Furthermore, there are up to 8 counters (CNT1..CNT8) that can count pulses coming from an external source (through a digital
input INPx) or the number of times that a certain condition as been verified. 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 8BGA power factor controller.
CODE DESCRIPTION
LIMx Limit thresholds
REMx Remote-controlled variables
UAx User alarms
PULx Energy consumption pulses
CNTx Programmable counters

13 LIMIT THRESHOLDS (LIMX)

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.
The meaning of the thresholds depends on the following functions:
13.1. 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 set delay, the LIM status is reset.
13.2. 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 upper threshold for the programmed delay. When the measured value decreases below
the lower setpoint, after the delay, the LIM status is reset.
13.3. Max+Min function: both thresholds are for tripping. When the measured value is less than lower or more than upper
setpoints, 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 LIMn latch is enabled, the reset can be done only manually using the dedicated command in the commands menu.
See setup menu M20.

14 REMOTE-CONTROLLED VARIABLES (REMX)

The 8BGA power factor controller can manage up to 16 remote-controlled variables (REM1...REM16).
Those are variables which status can be modified by the user through the communication protocol and that can be used in
combination with outputs.
Those 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 power factor relay exit relays to drive lighting or similar loads.

15 USER ALARMS (UAX)

The user has the possibility to define a maximum of 8 programmable alarms (UA1...UA8).
Type of measure
Function
Tipo di misura
Status of the limit
variable
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rev9 jan19
BASE EXP
- 1...8
1...8 9...16
- 1...2
- 1...4
- 1...4
RANGE
1...16
1...16
1...8
1...3
1...8
Upper threshold
Threshold delay
Lower threshold