1. Prepare Arduino Uno Micro USB OTG Cable HMI Modbus Free software download on CH Play Here, I put the rheostat on pin A0 and Led 12 2. Arduino Programming You see my previous post and follow, remember to test … Continued
Prepare UART TTL to RS485 . communication circuit DB9 port You wire as shown. Here I use S7-200 CPU226 with 2 communication ports. Here you do not need to attach the resistor. Then attach DB9 port to Port 0 of S7-200 2. … Continued
Prepare UART TTL to RS485 . communication circuit DB9 port You wire as shown. Here I use S7-200 CPU226 with 2 communication ports. Here you do not need to attach the resistor. Then attach DB9 port to Port 0 of S7-200 2. … Continued
Servo SG90 control principle You guys often use the Arduino library to control the SG90, so sometimes I don’t pay attention to the principle, so did I before. Its principle is easy to understand: Generate a PWM pulse with a … Continued
Modbus is an industrial communication protocol standard that operates on the principle of “Master – Slave”. One Master can connect to many Slaves. Currently, most industrial devices use Modbus, so in order for the arduino to communicate with PLCs, HMIs, inverters, etc., … Continued