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perma-batteries avatar image

ESS MODE 3 GRIDSETPOINT REFRESH RATE

Hello,


Looking out to the Modbus experts out there, we've got an ESS comprised of 3x Quattro 15kVA, running with our own PLC and control loop under Mode 3, but we read in the manual two conflicting values. At the beginning, it states that that the gridsetpoint TCP registry (DBUS TCP register 37,40 & 41) must be written once every minute, not less, or the system will go into passthru.


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Then it states that it must be written AT LEAST once every minute :


Am I getting this right ? This is critical for us as we need a fast response time on this value because we need to regulate the ACIN power coming from a hydroturbine. My common sens would tell me that the grid setpoint is faster than one minute (otherwise in common ESS mode 1 the system would overshoot and send power back to the grid even with a grid setpoint >0W) but we just need to double check.


Thanks in advance


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MultiPlus Quattro Inverter ChargerESS
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Please, someone answer this. I have the same question.

2 Answers
Daniël Boekel (Victron Energy Staff) avatar image
Daniël Boekel (Victron Energy Staff) answered ·

Hi @perma-batteries and @Mateus Silva de Oliveira

must be written once every minute, not less, or the system will go into passthru.
What is not clear about this? maybe lost in translation? they must be written at least once per minute, but yes of course usually they are updated much faster (Seconds) in an active system.

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perma-batteries avatar image
perma-batteries answered ·

Nobody has the answer ? Any Victron tech team here ?


Thanks

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