Alarm Status Display
By pressing the digit 2 after “Menu Select”, a list of all the existing alarms on the system is displayed and fleeting alarms have to be accepted individually in this sub-menu.

Fleeting Alarms
Fleeting alarms are alarms, which occur once and then, disappear but it is important that you know that they have occurred. For example, if the battery charger stays in boost for excessive time and the BMS switches it back to float charge, based on the timer, then this information must be retained in the fleeting alarm status.

The BMS uses the five (5) potential free relays to switch other mechanical relays or as Alarm outputs. These relay outputs are located on the left-hand side of the BMS Control Module and are taken out through an 18–way keyed terminal plug. The relays have a Normally Closed, Common and a Normally Open contact.

ALARMS and their functionality
On an event of an alarm, the LED will flash to indicate there is an alarm present. The relay will activate to notify the station’s telemetry Control room that there is an alarm present.
When the maintenance technician goes to investigate the problem, the ALARM ACCEPT button can be depressed to silence the alarm in the control room. The alarm will still be present and the alarm LED, either MAJOR ALARM or MINOR ALARM will stop flashing and will remain on until the alarm is cleared.

Event Recorder
The SILICON BMS™ event recorder logs events occurring on the system and stores the time of occurrence, the value at the time of occurrence and the type of event in real-time
The event sequence (Seq) numbers give the chronological order of the event – the highest number is last. The value is a useful value at the time of the event. e.g. the resistance to earth when an earth fault occurs. BMS has a built-in real-time clock and runs even if the BMS is not powered up. The SILICON BMS™ Elite shows time in date and time format with the actual event,
Alternatively, the event recorder may be downloaded via the serial port. The port is identified as PORT1, which is located at the bottom of the BMS module left-hand side of the PCB. The path to see the SILICON BMS™ Studio is found on the “BMS Records” tab.

A serial to USB converter can be used to download the events in real-time to the SILICON BMS™ Studio App specially designed by Silicon Engineering for our customer use.

More information can be downloaded here

*These specifications are subject to change from time to time, without warning and at the sole discretion of Silicon Engineering (PTY) LTD. 072012