| Serial communication problems |
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10.22.2007 |
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TriStar, Relay Driver, Sun Saver Duo, SureSine, PC MeterBus Adapter, RSC (EIA-485 to serial), SunSaver MPPT, TriStar MPPT, TriStar MPPT 600 V, ProStar MPPT, ProStar (Gen3)
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Description:
If you are having problems communicating with a Morningstar product using a serial connection, try the following:
1. Make sure that the unit is powered with a battery or power supply. The unit cannot communicate without power.
2. Verify that the serial cable is not a Null Modem or cross-over cable.
3. Verify that no other programs or managers are using the same serial port.
4. Check the serial cable for continuity using a multimeter. The cable should have continuity from Pin1<->Pin1, Pin2<->Pin2,… If possible, try another cable.
5. Shut down and restart the PC. Reattempt connection.
6. Try another PC
For products that require the PC MeterBus Serial Adapter (Model: MSC), check the RJ-11 telephone cable. If possible, try another cable. It has been reported that some USB to Serial cables will not work with the MSC because the RS-232 output signal voltages are below the RS-232 electrical specification.
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| What is the Modbus protocol? |
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12.13.2007 |
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Related:
TriStar, Relay Driver, Sun Saver Duo, SureSine, PC MeterBus Adapter, RSC (EIA-485 to serial), SunSaver MPPT, TriStar MPPT, TriStar MPPT 600 V, ProStar MPPT, ProStar (Gen3), Ethernet Meterbus Converter
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Description:
Direct from the FAQ at http://www.modbus.org :
MODBUS® Protocol is a messaging structure developed by Modicon in 1979, used to establish master-slave/client-server communication between intelligent devices. It is a de facto standard, truly open and the most widely used network protocol in the industrial manufacturing environment. It is literally implemented by hundreds of vendors on thousands of different devices in order to transfer discrete/analog I/O and register data between control devices. It’s really a lingua franca or common denominator between different manufacturers. One report called it the “de facto standard in multi-vendor integration”.
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| Where can I find an RS-232 cable? |
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12.13.2007 |
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| What pins do I use for making my own serial cable? |
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12.07.2009 |
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TriStar, Relay Driver, PC MeterBus Adapter
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Description:
I want to make my own serial cable. What pins do I need (at a minimum)?
The serial port on the TriStar is opto-isolated per UL requirements. For this reason, the TriStar serial port is “port powered”, which means it requires a small amount of power from the host (PC or other device). In addition to pins 2,3,& 5, pin 4 and/or 7 should be connected. For more information, refer to the document, “TriStar RS-232 Wiring”.
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| Help using the MSView Software |
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05.13.2013 |
01 |
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Related:
TriStar, Sun Saver Duo, SureSine, PC MeterBus Adapter, SunSaver MPPT, TriStar MPPT, RSC (EIA-485 to serial), TriStar MPPT 600 V, Relay Driver, ProStar MPPT, ProStar (Gen3)
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Description:
MSView contains a built-in Help File (accessible from the Help menu -> Help Topics) which provides detailed information about using the software to connect to Morningstar devices, program custom settings, view and/or log real-time data, and evaluate system performance.
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| Common Reasons Why Power Transistors Fail |
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09.28.2011 |
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TriStar, Sun Saver Duo, SunKeeper, SunLight, SunGuard, SHS, ProStar, Sun Saver, Relay Driver, SunSaver MPPT, SureSine, TriStar MPPT, TriStar MPPT 600 V, ProStar MPPT, ProStar (Gen3)
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Description:
The internal switches of a controller, called MOSFETs or power transistors, switch current on and off to control solar current and load current. Because these components are in the power path, the controller will no longer be able to switch current if they fail.
Power transistors can fail for the following reasons:
- Over-voltage: lightning or other high voltage transients on the PV power cables.
- Over-current: too much PV for the controller or a short in the PV line pulls too much currentout of the battery through the controller.
- Extreme temperatures during charging.
- A premature failure of the component. The transistors are solid state devices that are manufactured in huge volumes with extremely low failure rates. However, no electrical components are 100% defect free and can pass test and then fail after a short period of time.
- Old age
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| Where do I get software to program my controller? |
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12.13.2007 |
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Related:
TriStar, Sun Saver Duo, PC MeterBus Adapter, Relay Driver, RSC (EIA-485 to serial), SunSaver MPPT, SureSine, TriStar MPPT, TriStar MPPT 600 V, ProStar MPPT, ProStar (Gen3)
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Description:
We supply PC software free of charge (called MSView). It is available for download on our website. Sorry, Apple Mac is not supported.
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