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