Code Description - LOVATO ELECTRIC DCRL8 Manuel D'instructions

CODE DESCRIPTION
P.54 Number of switchings for maintenance
P.55 Step 9 function
P.56 Step 10 function
P.57 Step 11 function
P.58 Step 12 function
P.59 Step 13 function
P.60 Step 14 function
P.21 – If set to OFF, password management is disabled and anyone has access to the settings and commands menu.
P.22 – With P.21 enabled, this is the value to specify for activating user level access. See Password access chapter.
P.23 – As for P.22, with reference to Advanced level access.
P.24 – Number of phases of the power correction panel.
P.25 – Enables the measurement of the actual power of the step, performed each time they are switched in. The measure is calculated, as the current measurement is referred to the whole load of the plant.
The measured power of the steps is adjusted (trimmed) after each switching and is displayed on the step life statistic page. When this function is enabled, a 15 sec pause is inserted between the switching of
one step and the following, necessary to measure the reactive power variation.
P.26 – P.27 – Tolerance around the setpoint. When the cosphi is within the range delimited by these parameters, in AUT mode the device does not connect / disconnect steps even if the delta-kvar is greater than the
smallest step.
Note: + means 'towards inductive', while – means 'towards capacitive'.
P.28 – Selecting mode of steps insertion.
Standard mode – Normal operation with free selection of the steps
Linear mode – The steps are connected in progression from left towards right only following the step number and according to the LIFO (Last In First Out) logic. When the system steps are of different ratings,
the controller will not connect the next step should the set-point value be exceeded.
P.29 – Setpoint used when the system is generating active power to the supplier (with active power / power factor both negative).
P.30 – Disconnection sensitivity. Same as the previous parameter but related to disconnection. If set to OFF, the disconnection has the same reaction time of connection set with the previous parameter.
P.31 – If set to ON, when switching from AUT to MAN mode, steps are disconnected in sequence.
P.32 – Trip Threshold for the capacitors overload protection (alarm A08), that will trip after a integral delay time, inversely proportional to the value of the overload.
Note: You can use this protection only if the capacitors are not equipped with filtering devices such as inductors or similar.
P.33 – Threshold beyond which the integral delay for tripping of the overload alarm is zeroed, causing the immediate activation of A08 alarm.
P.34 – P.35 – Data of VTs eventually used in the wiring diagrams.
P.36 – Unit of measure for temperature.
P.37 – P.38 – Start and stop temperature for the cooling fan of the panel, expressed in the unit set by P.36. The cooling fan is started when the temperature equal to or less than P.37 and it is stopped when it is
greater than P.38.
P.39 – Threshold for generation of alarm A08 Panel temperature too high .
P.40 – Percentage threshold of the residual power of the steps, compared with the original power programmed in main menu. Below this threshold the alarm A10 step failure is generated.
P.41 – Maximum voltage alarm threshold, referred to the rated voltage set with P.07, beyond which alarm A06 Voltage too high is generated.
P.42 – Undervoltage alarm threshold, referred to the rated voltage set with P.07, below which alarm A05 voltage too low is generated.
P.43 – Maximum system voltage THD alarm threshold, beyond which alarm A10 THDV too high is generated.
P.44 – Maximum system current THD alarm threshold beyond which alarm A05 voltage too low is generated.
P.45 – Maintenace interval in hours. When it is elapsed, alarm A12 maintenance interval is generated. The hour count increments as long as the device is powered.
P.46 – Function of the semi-circular bar-graph.
Kvar ins/tot: The bar graph represents the amount of kvar actually inserted, with reference to the total reactive power installed in the system.
Curr act/nom: Percentage of actual system current with reference to the maximum current of the CT.
Delta kvar: bar graph with central zero. It represents the positive/negative delta-kvar needed to reach the setpoint, compared to the total kvar installed.
P.47 – Default measurement shown on the secondary display. Setting the parameter to ROT, the different measuremets are shown in sequential rotation.
P.48 – If set to ON, the display backlight flashes in presence of one or more active alarms.
P.49 – Serial (node) address of the communication protocol.
P.50 – Communication port transmission speed.
P.51 – Data format. 7 bit settings can only be used for ASCII protocol.
P.52 – Stop bit number.
P.53 – Select communication protocol.
P.54 – Defines the number of step operations (considering the step that has the highest count) beyond which the maintenance alarm A12 is generated. This parameter should be used as alternative to P.45. If both
P.45 and P.54 are set to a value other than OFF, then P.45 has priority.
When changing from threshold use defined by P.45 to P.54 or vice versa, it is important to clear the maintenance interval using command C01, and the counting of step operations using C02.
P.55 ... P.60 – Function of output relays 9...14. See description of parameter.
ACC UoM DEF RANGE
Adv kcnt OFF OFF / 1-60
Usr OFF
1...32
A01...A13
Usr OFF
Usr OFF
Usr OFF
Usr OFF
Usr OFF
OFF
G
ON
B
NOA
NCA
FAN
MAN
AUT
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9