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Technical Reference Modbus Translator Module

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Technical Reference Modbus Translator Module ( technical-reference-modbus-translator-module )

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Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Technical Reference: ModBus Translator Module Preset Single Register (Function Code 06) This function writes to a single register. The command requires a Slave Address, Function Code, Start Address, Data, and CRC16. Attempting to write to a read-only register will cause an exception. The example shown in the table below shows how to set the Time of Use Event value at register 48507. Table 5 – Function Code 06 Command and Response (Preset Single Register) Byte Name Example Notes 1 Slave Address 01 2 Function Code 06 3 Start address high 21 4 Start address low 3A 5 Data high 00 6 Data low 05 7 CRC-16 low XX 8 CRC-16 high XX Time of Use Event at register 48507 (48507- 40001 = 8506 = 213Ah) Set Event to number 5 Preset Multiple Registers (Function Code 16) This function writes to one or more contiguous registers. The command requires a Slave Address, Function Code, Start Address, Register count, Byte count, Data, and CRC16. Attempting to write to a read-only register will cause an exception. The table below shows how to enter a Time of Use Event value at register 48507. Table 6 – Function Code 16 Command (Preset Multiple Registers) Byte Name Example Notes 1 Slave Address 01 2 Function Code 10 3 Start address high 21 4 Start address low 3A 5 Register count high 00 6 Register count low 06 7 Byte count 0C 8 Data high 00 9 Datalow 05 10 Data high 00 11 Datalow 01 12 Data high 08 13 Datalow 0F 14 Data high 00 15 Datalow 01 16 Data high 00 17 Datalow 02 410040-001 Rev A (February 2003) Time of Use Event at register 48507 (48507- 40001 = 8506 = 213Ah) Writing to 6 registers (48507 – 48512) 6 registers, 2 bytes each Time of Use Event = 5 Event Day = 1 – Sunday Event Time = 080F hex (8:15AM) Start Command = 1 – Start Power Demand = 159,000 Watts = 26D18 H Page 10 of 35 This information is proprietary to Capstone Turbine Corporation. Neither this document nor the information contained herein shall be copied, disclosed to others, or used for any purposes other than the specific purpose for which this document was delivered. Capstone reserves the right to change or modify without notice, the design, the product specifications, and/or the contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction.

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