Alpha Technologies Cordex Controller Ver.2.0 - Manual (Page 67)

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Figure 54–Controller Signals configuration example five (part two)
(configure custom alarm for input reading error)
6.6.2.7 Midnight Rollover
The Scheduler (see Scheduler Usage and Custom Alarm examples above) functionality is
simple. It tests to see if the System Time is greater than the time entered by the user. This
means that at midnight, 00.00.00, the user time will always be greater than the System Time.
Example
So how can the scheduler be set up to ensure that this midnight rollover will not cause a
problem with any Custom Signal that uses the System Time? In real life, you might want to
trigger a generator and keep it on for some amount of time regardless of the midnight rollover.
These sample equations will configure Custom Signal 1 to remain on for about 30s even if
midnight rollover occurs.
Custom Signal 1 Equation:
([System Time (HH.MM.SS)] > <<23.59.55>> | [Custom Signal 1]) & ([Timer 1] < 29)
Timer 1 Equations:
Run Event: [System Time (HH.MM.SS)] > <<23.59.55>>
Stop Event: [Timer 1] >30
By this example, we see Custom Signal 1 go to 1.00 at 5 seconds to midnight, then go to 0.00
at about 25 seconds after midnight. This behavior will repeat daily.
6.6.2.8 Converter Signals
This feature will enable the user to view the status for all of the acquired converters in the
system; including but not limited to:
Total Conv. Current # Failed Conv. # Conv. Input Voltage Failed # Conv. Fan Failed
Avg Conv. Output Voltage # Conv. Minor Alarm # Out Of Tolerance Conv. Converter Load Voltage
Total Conv. Input Current # Conv. In Comms Lost # Conv. In Current Limit Converter Load Current
# Acquired Conv.
The existing Controller Signals category now includes signals for Converter Load Voltage and
Converter Load Current; by default, Average Conv. Output Voltage and Total Conv. Output
Current are used respectively.
Re-configurable System Load Current and System Battery Voltage
For converter shelves that do not have any Cordex rectifiers in the system, the system Load
Current may be re-configured to display the total converter output current and the system
Battery Voltage may be re-configured to display converter output voltage; that is, the signals
can be renamed.
Recommendation For Converter Redundancy
A redundant converter in a system will allow one converter to be shut down while the other
converters supply power to the load; e.g., during firmware upgrade.
For the Custom Alarm equation, the Custom Signal is
compared to the maximum* allowable voltage deviation in
battery string halves. In this example a message is recorded
when the midpoint voltage is in error.
* Some fine-tuning may be required to obtain the ideal setting
that is sensitive enough to detect a ‘bad’ cell and will not
produce false alarms.