Using a PT Controller: Operation/Monitoring
©
2017 Sensata Technologies
Page 133
PT Status:
• Absorb
Charging
• Bulk
Charging
• Charger
Off
• EQ
Charging
• Float
Charging
• Sleeping
• UnknownStatus
##
PT Faults:
• ARC
Fault-PT
• BTS
Open-PT
• BTS
Shorted-PT
• FET
Overtemp-PT
• Ground
Fault-PT
• HiBatt
Temp-PT
• High Bat VDC-PT
• High PV VDC-PT
• Ind
Overtemp-PT
• Int
Hardware-PT
• Int
NTC-PT
• Int
Overload-PT
• Int
Phase-PT
• Int
Power-PT
• Int Pwr Sup-PT
• No PV Input-PT
• Unknown Fault ##
Chg Mode:
• Absorb
• Bulk
• Charger
Off
• EQ
• Float
• Unknown Status ##
CTRL:
05D PT MPPT Ctrl
To maximize energy harvest under partially shaded conditions, the PT controller performs an
initial sweep of the entire power-voltage characteristic of the array. It does this to ensure the
approximated Maximum Power Point (MPP) is detected under partially shaded conditions. After
this initial sweep occurs, the sweep frequency (or how often the sweep occurs) can be changed
in an attempt to match the environmental conditions—using the following settings.
Note:
If more than one PT controller is connected in your system, you will need to adjust this
setting for each controller. See Figure 12-4 for instructions on navigating this menu.
Default setting:
15 Min Sweep
Range:
5 Min Sweep, 15 Min Sweep, 1 Hour Sweep, Fixed Sweep
Info:
Unless there is an unusual environmental event that can change the MMP quickly,
such as fast moving clouds, then it is highly suggested that you not change the default
setting (15 Min Sweep).
• 5 Min Sweep¹
– After the initial sweep, performs a full sweep every 5 minutes.
• 15 Min Sweep¹
– After the initial sweep, performs a full sweep every 15 minutes.
• 1 Hour Sweep¹
– After the initial sweep, performs a full sweep every 60 minutes.
• Fixed
Sweep
– With this setting, there is no full sweep. At sunrise, the sweep begins and
holds at the
fi
rst peak and then increments around this point until sunset.
Info:
The
Fixed Sweep
setting is advantageous if used in areas with normally clear
skies and no obstructions on or around the array. However, if there are multiple peaks
as the result of partial shading, the controller may not be
fi
xated on the maximum
power point.
Note¹
– In each of these time sweeps, the PT controller continually increments to
fi
nd the MPP.
12.2.2 Monitoring the PT Charge Controller
The ME-ARTR router’s METER button has additional menus that are helpful for the proper operation
and monitoring of your PT controller system.
12.2.2.1
ME-ARTR Router’s PT Controller METER Menus
Press the ME-ARTR router’s METER button, rotate the SELECT knob to the
07 PT Meters
menu,
and then press the SELECT knob to access the
07 PT Meter
read-only menus. Rotate the SELECT
knob to view the various PT meters.
METER: 07A PT Status
This read-only menu allows you to view your controller system’s PT and power statuses. Press
and then rotate the SELECT knob to view the PT and power statuses for each individual connected
PT controller.
Info:
This menu is used to determine if the PT controller is working correctly and for
troubleshooting. Refer to Section 12.3.2.
There are 24 different status/fault messages that can display to identify what state the PT is
currently in—only one displays at a time (refer also to Tables 12-2 and 12-4).
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