Function codes supported by HMI as modbus host

Function No. 01: Read the coil status and get the current status of a group of logic coils (ON/OFF)
Function No. 03: Read holding registers and get the current binary value in one or more holding registers
Function No. 05: Force a single coil, force a logic coil on and off state (write bit)
Function No. 06: Load specific binary values into a holding register (write register)
No. 16 function: preset multiple registers, load specific binary values into a series of continuous holding registers (write multiple registers)

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