Modbus Function Codes that FieldPoint Supports
You can use the following Modbus function codes with the cFP-180x:
- 1—Read Coils
- 2—Read Discrete Inputs
- 3—Read Holding Registers
- 4—Read Input Registers
- 5—Write Single Coil
- 6—Write Single Register
- 8 : 0—Diagnostic : Echo
- 15—Write Multiple Coils
- 16—Write Multiple Registers
- 22—Mask Write Register
- 23—Read and Write Multiple Registers