012-526-B2 Rev C
Page 15 of 20
6
System Startup
After completing the shelf wiring and installation, perform the following startup and test procedure to ensure
proper operation:
6.1
Check System Connections
•
Ensure power is off, battery is disconnected, and all modules are removed from the shelves.
•
Triple check the polarity of all connections.
6.2
Verify Input and Power the Shelf
•
Verify input voltage is correct and install one power module.
•
The converter I/P LED should illuminate after a preset start delay.
CAUTION
If the CXDF 24-48/2kW is installed in a system that pre-dates Cordex controller software version
1.97, then a software upgrade must first be performed on the controller. Without the upgrade,
there is no communication between the controller and converters. See CXC software “readme” file
for upgrade procedure.
•
Using a Cordex controller (for example, the CXCI via web browser), test functionality of various module
alarms and controls.
•
Install remaining modules.
•
In the adjustments menu of the Cordex controller, set converter voltage.
•
Using the Cordex controller, test functionality of various module alarms and controls. In addition, perform a
load test with the system using a resistive load box as needed.
6.3
Converter Operation and Programming via the CXC
NOTE:
Refer to the current version (1.97 minimum) software manual.
The existing CXC 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.
6.3.1
Load Current in a Rectifier/Converter System
For proper operation of Charge Current Control and Power Save, the system load current must include the
current drawn from the rectifiers used to power the converters. Depending on the location of the current shunt in
the system, it may be necessary to modify the Load Current equation to add the Total Converter Input Current.
To view the load current of the system load, without the influence of the Converter Input Current, a custom signal
can be created; for example, if Load A powers some equipment and Load B is the current drawn by the
converters, then the equation for Load A would be: Total Rectifier Output Current - Total Converter Input Current.
6.3.2
Recommendation for Converter Redundancy
During firmware upgrade (programming) of the converter, the converter being programmed will be turned off and
not deliver any power. This is largely due to the way in which the converter begins operation after programming.
The power-up sequence for a converter is to start with 0V and 0A for a Start Delay of one through ten seconds.
After this period has expired, the converter will ramp up the Output Voltage and Current Limit values to the
appropriate settings in about one second. Furthermore, since the converter will be off for at least this amount of
time, the present implementation turns off the converter before the programming. The programming time is added
to the Start Delay to provide the total amount of time for which the converter will be off or out-of-service.
Therefore, with one redundant converter in a system, the load will still receive power from the other converters
while one of them is being programmed.
