Vertiv Liqui-tect LP6000, Installer/User Manual

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6.2.2 Function 04: Read Input Registers
To read the input values, the master must send a Read Input Registers request packet.
The Read Input Registers request packet specifies a start register and the number of registers to read.
The start register is numbered from zero (30001 = zero, 30002 = one, etc).
READ REGISTER REQUEST PACKET READ REGISTERS RESPONSE PACKET
Slave Address (1 byte) Slave Address (1 byte)
04 (Function code) (1 byte) 04 (Function code) (1 byte)
Start Register (2 bytes) Byte count (1 byte)
# of registers to read (2 bytes) First register (2 bytes)
CRC Checksum (2 bytes) Second register (2 bytes)
…
Cry Checksum (2 bytes)
Table 8.4 Read-output Register Packet Structure
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