Read Coils
FC 01
Read Discrete Inputs
FC 02
Write Single Coil
FC 05
Write Multiple Coils
FC 15
Read Holding Registers
FC 03
Read Input Registers
FC 04
Write Single Register
FC 06
Write Multiple Registers
FC 16
Read/Write Multiple Registers
FC 23
Mask Write Register
FC 22
Read File Record
FC 14
Write File Record
FC 15 (FC15/06)
Read Exception Status
FC 07
Diagnostics Query
FC 08
Read Device Identification
FC 43/14
Full Automated Feature Suite Check
Clicking below will execute a sequential batch check of all Modbus functions supported by this library using Web Serial.