Alarms; Automatic Test; Diagnostic Messages; Keypad Lock - LOVATO ELECTRIC ATL20 Manual Operativo

ALARMS

– When an alarm condition occurs, ATL either shows a code on the displays or lights up a dedicated LED.
– For non-retentive alarms, the indication disappears automatically when the alarm conditions stop, while for retentive ones, a manual reset is
needed on the unit front panel. This is done by pressing key OFF / RESET (and then shifting to OFF mode).
– The presence of any alarm is signalled by the relevant flashing ALARM LED.
– In the presence of an alarm, both the global alarm output (ALA) and the ATS ready output (rdy) are de-energised.
– An alarm can be disabled by programming to OFF the parameter defining its threshold or the programmable input generating it.
– The following table lists the possible alarms and their meanings. The RET column specifies if the alarm is retentive, while the MODE column
indicates the operating modes (OFF MAN AUT TEST) where the alarm is enabled.
PAR Descrizione
A01 Battery voltage too low
A02 Battery voltage too high
A03 Line 1 circuit breaker timeout
A04 Line 2 circuit breaker timeout
A05 Line 1 wrong phase sequence
A06 Line 2 wrong phase sequence
A07 Load not powered timeout
A08 Generator not available
A09 Emergency
LED Withdrawn
Line 1 / 2 circuit breaker withdrawn
LED Trip
Line 1/ 2 circuit breaker protection tripped
A01 - A02 - Battery voltage beyond threshold for a time exceeding the time set.
A03 - A04 - The changeover device did not perform the opening or closing operation within the max time set. After alarm tripping, the opening or closing
command is inhibited.
If motorised circuit breakers are used, alarms are tripped only if at least one of the two power sources is present, i.e. if it is higher than the minimum thresholds
programmed.
A05 - A06 - The phase sequence recorded does not correspond to the one programmed.
A07 - The load remained de-energised for a time exceeding the one programmed by P2.11, either because supply lines were not available or because both circuit
breakers remained open.
The alarm is not generated if the Stand-by input opening has been tripped.
A08 - Can be generated by the opening of the external 'generator not ready' input or when, after having started the generator, the voltage does not become
acceptable within the time specified by P2.11. If the alarm is generated by the external input then it is not retenitive. Otherwise it is retenitive and thus must be
reset using RESET/OFF key.
In applications with two generators, A08 is shown on the Line 1 or Line 2 display depending on which generator tripped the alarm.
A09 - Alarm generated by the opening of the external emergency input. Both circuit breakers are opened.
WITHDRAWN LED - Generated by the opening of programmable input Withdrawn. The open and close commands of the circuit breaker concerned are inhibited.
TRIP LED - Generated by the closing of programmable input Trip. The open and close commands of the circuit breaker concerned are inhibited.

AUTOMATIC TEST

– The Automatic test consists of a generator starting cycle that is run periodically to check the efficiency of the generator itself, when ATL is in AUT mode.
– The frequency and the duration of the automatic test can be defined by the user. See set-up menu P8 for a more detailed description of all parameters
involved in automatic test programming.
– The general enable of the automatic test is shown by the dedicated TEST
or directly from the front panel (without entering set-up programming) by pushing key B and then key E. This operation does not change the ATL operating
mode.

DIAGNOSTIC MESSAGES

– The ATL display can show messages to signal the implementation of a function or a particular situation.
– By pressing one of the keys for measurement selection, the diagnostic display is temporarily stopped to allow measurement viewing.
CODE Description
StA Generating set startup
Coo Generating set cooling cycle
FSi Line failure simulation
—- Interlock time in progress
toL Test with load in progress
Set rtc RTC set-up needed (see P2.23)
Loc Locked keypad
Unl Unlocked keypad
S.by Controller in Stand-by imposed by external input.
Lo SUP Supply voltage too low.

KEYPAD LOCK

– The ATL keypad can be locked either by means of a programmable input or with a particular procedure using front keys.
– Once the keypad is locked, it will only be possible to view measurements, but not change operating mode or manually operate on circuit breakers. Only the
keys for measurement selection will remain enabled.
– Any attempt to use the locked keys will cause the word Loc to be displayed.
– To lock or unlock the keypad, press key A and, while holding it down, press key B three times without releasing it at the end.
– Then release key A and press it five times, then release both keys.
– When the keypad is locked, the display shows the word Loc. Instead, if it has been unlocked, the word UnL is viewed.

REMOTE CONTROL

– It is possible to connect ATL to a PC through its serial interface and to monitor the operation of the device using the dedicated software ATLSW or using a
generic SCADA software that supports Modbus protocol.
– ATL20 and ATL30 can be connected directly in peer-to-peer configuration using the RS232 serial interface port and cable with order code 51C2.
– ATL30 can also be connected through RS485 interface in a multi-drop configuration, using the wiring diagrams given in the following pages.
– Furthermore, it is possible to configure the system for a modem-based remote communication, using either an analog modem or a GSM wireless modem.
– When using a GSM modem, it is possible to use the AUTOCALL function, that allows automatic sending of SMS or mail warning messages in case of alarms
and/or events.
– For more details concerning modem connection and configuration of the AUTOCALL function, refer to see the manual of the ATLSW remote control software.
RET
G
G
G
G
G
G
G
G
G
LED on the front panel. Il can be activated or deactivated by parameter P8.01
G
B
MODE
O M A T
O M A T
A T
A T
O M A T
O M A T
A T
O M A T
O M A T
A T
A T
11