Basler BE1-CDS220, Instruction Manual

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6-40 Reporting and Alarm Functions BE1-CDS220
Sequence of Events information can also be obtained through BESTCOMS. Select Reports from the
toolbar and select Oscillography Download from the drop-down menu. Select the event number and
select View Fault Sequence of Events for details. See Figure 6-20. Select Exit when finished.
ALARMS FUNCTION
The alarms function monitors internal relay systems, external relay interfaces, and power system
equipment. Alarm points are segregated into Relay Trouble Alarms and Programmable Alarms. Alarm
point status is stored in nonvolatile memory and is retained when relay operating power is lost.
The ability to program the reporting and display of alarms along with the automatic display priority feature
of the HMI gives the relay the functionality of local and remote alarm annunciation. See Section 10,
Human-Machine Interface, for more information on the automatic display priority logic.
Relay Trouble Alarms
All internal circuitry and software that affects how the relay functions is monitored by the continuous self-
test diagnostics function of the relay trouble alarms. A detailed list of relay trouble alarms is provided in
Table 6-20. If any one of these points asserts, the failsafe alarm output relay de-energizes and closes the
OUTA contact, the HMI Relay Trouble LED lights, all output relays are disabled, logic variable ALMREL is
set, and the relay is taken offline. The relay trouble alarms function is not programmable.
If your application requires a normally closed contact that opens to indicate a relay trouble condition, use
BESTlogic to program the output logic. One of the output relays with normally open contacts (OUT1
through OUT6) can be programmed to be held closed. For example, to open OUT5 for indication of relay
trouble, set the VO5 logic expression at /0 (SL-VO5=/0). A not zero setting is equal to logic 1. When the
relay is fully functional, the OUT5 output contact is closed. Since all output relays are disabled when a
relay trouble alarm exists, OUT5 opens when relay trouble occurs.
Table 6-20. Relay Trouble Alarms
I.D. # Name Description
1 RAM FAILURE Static RAM read/write error.
2 ROM FAILURE EPROM program memory checksum error.
3 UP FAILURE Microprocessor exception or self-test error.
4 EEPROM FATAL ERROR EEPROM read/write error.
5 ANALOG FAILURE Analog to digital converter error.
6 CALIBRATION ERR Relay not calibrated or calibration checksum error.
7 PWR SUPPLY ERR Power supply out of tolerance.
8 WATCHDOG FAILURE Microprocessor watchdog circuit timed out.
9 SET DEFLTS LOADED Relay using setting defaults.
10 CAL DFLTS LOADED Relay using calibration defaults.
11 DSP FAILURE Digital signal processor error.
Relay trouble alarms, except for CALIBRATION ERR, EEPROM FATAL ERR, SET DFLTS LOADED, and
CALDFLTS LOADED indicate that the relay is not functional and causes the self-test diagnostics to force
a microprocessor reset to try to correct the problem.
CALIBRATION ERR, EEPROM FATAL ERROR, or DFLTS LOADED errors indicate that the relay is
functional but needs re-calibration or the settings reprogrammed.
Any relay trouble alarm will disable the protection functions, light the Relay Trouble LED, and place the
output contacts in their normal, de-energized state. If a relay trouble (RA-REL) alarm is cleared by
pressing the HMI Reset key while viewing Screen 1.2 or using the RA=0 or RA-REL=0 commands, then
the relay will attempt to return back online by issuing a software reset. The relay resets by going through
a full startup and initialization cycle. If no problems are detected, the relay returns online and enables
protection.