{"id":5315,"date":"2021-08-31T13:30:45","date_gmt":"2021-08-31T11:30:45","guid":{"rendered":"https:\/\/knowledgebase.fischerpanda.de\/?p=5315"},"modified":"2026-03-24T15:45:13","modified_gmt":"2026-03-24T14:45:13","slug":"agt-ui-control-with-bms","status":"publish","type":"knowledgebase","link":"https:\/\/knowledgebase.fischerpanda.de\/?knowledgebase=agt-ui-control-with-bms","title":{"rendered":"DC Generator \u2013 UI control with BMS"},"content":{"rendered":"\n

You can connect a Fischer Panda AGT generator to a battery management system (BMS). In BMS UI mode the AGT can control either on voltage or on current.<\/p>\n\n\n\n

Functional description<\/h2>\n\n\n\n

In BMS UI mode the AGT can control either on voltage or on current. The battery management system (BMS) delivers the input values. It uses a CAN message (PGN 65305) to specify the control variable and further parameters. The flags in SPN 520270 determine whether voltage or current should be regulated. These flags are also used to code whether the other size (current in case of control for voltage and vice versa) is to be used as limiter.<\/p>\n\n\n\n

There are four options to use the BMS UI mode:<\/p>\n\n\n\n

SPN 520270<\/strong><\/td>control variable \/ type of limiter<\/strong><\/td>Description<\/strong><\/td><\/tr>
0<\/strong><\/td>control voltage \/ no limiter<\/td>when regulating to voltage (U_bat) without limitation the current (I_charge) is ignored<\/td><\/tr>
1<\/strong><\/td>control voltage \/ current limiter<\/td>the voltage (U_bat) is regulated as long as the battery current (I_charge) is below its limit value (I_limit),
when the battery current reaches its limit, the system switches to current control<\/td><\/tr>
2<\/strong><\/td>control current \/ no limiter<\/td>when regulating to current (I_charge) without limitation the voltage (U_bat) is ignored<\/td><\/tr>
3<\/strong><\/td>control current \/ voltage limiter<\/td>the current (I_charge) is regulated if the battery voltage (U_bat) is below its limit value (U_limit),
when the battery voltage reaches its limit, the system switches to voltage control<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
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NOTE:<\/strong> The following graphics are basic principles and symbolize the functionality.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n
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Mode \u00bb0\u00ab: control voltage \/ no limiter<\/em><\/figcaption><\/figure>\n<\/div>\n\n
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Mode \u00bb1\u00ab: control voltage \/ current limiter<\/em><\/figcaption><\/figure>\n<\/div>\n\n
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Mode \u00bb2\u00ab: control current \/ no limiter<\/em><\/figcaption><\/figure>\n<\/div>\n\n
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Mode \u00bb3\u00ab: control current \/ voltage limiter<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n
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SPNs required for parameterization<\/h3>\n\n\n\n
SPN 520271<\/strong><\/td>Battery voltage (control variable U_bat when controlling voltage or voltage limiter U_limit when controlling current)<\/td><\/tr>
SPN 520273<\/strong><\/td>Battery current (control variable I_charge when controlling current or current limiter I_limit when controlling voltage)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
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