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scronje avatar image
scronje asked

Sending -1 to modbus 2704 register

How do I send a -1 to modbus register 2704 which is the max discharge power register. Any postive number sets a value but -1 one is suppose to set no limit. Its a 16uint register. The question has been asked in the past but not answered. Using 16 bit 2’s compliment of 65535 does not work. What is the correct value to set a -1.

Modbus TCP
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2 |3000

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jventer avatar image jventer commented ·
I would also like to know.
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1 Answer
Mike Dorsett avatar image
Mike Dorsett answered ·

try sending 0x0FFF. This will be in excess of the unit's maximum current, and the internal processing should set the limit to the unit's maximum.

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