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The 3 LEDs on the top are the operation displays on ELWA. Functions are described in the ELWA instruction manual. The 3 green LEDs underneath show the operation condition of the ELWA Modbus Interface: No LED light:...
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Consider polarity! 5. Functionality The ELWA Modbus Interface is a link between the ELWA and a Modbus based bus system. Because of the bus capability the allocation of bus addresses is required when there are multiple devices in operation (register 1030).
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DC Breaker status, 0: open, 1: closed 1003 DC Relay status, 0:open, 1: closed 1004 AC Relay status, 0: open, 1: closed, write to register starts/stops ELWA AC relay 1005 Temperature in 1/10°C 1006 Current Water Temp Day minimum in 1/10°C 1007 Current Water Temp Day maximum in 1/10°C...
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1021 ELWA Modbus Interface temperature sensor in 1/10°C 1022 ELWA Modbus Interface boost temperature control setting in 1/10°C inactive (factory preset), start boost at setting – 40 (4°C hysteresis), stop boost at setting 1-700 set register 1020 to >1440 if 1022 is >0.
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