CONTENTS
1. Product Description...........................................................................................1
2. Features..................................................................................................................2
3. Order Information..............................................................................................3
4. Figure and Installation Dimension...............................................................4
5. Wiring.....................................................................................................................5
6. Display and Keys.................................................................................................7
6.1 LCD display instruction.......................................................................7
6.2 Data Display............................................................................................8
7. Functions.............................................................................................................22
7.1 Historical energy data.......................................................................22
7.2 TOU (Multi-tariff Energy).................................................................22
8. Main Technical Parameter.............................................................................25
9. Communication Protocol..............................................................................27
9.1. Introduction.........................................................................................27
9.2. Detailed Description of SPM93 Modbus Protocol................28
9.3. Packet Communication................................................................... 32
9.4. Calculating the CRC-16 Error Check Field................................36
9.5. SPM93 Register List ..........................................................................40
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