nayakajit87
Member level 5
I am trying to communicate modbus communication with PIC16F886/pic18F24k40/pic16F1938.I tested my code with MAX482 AND SN75176A NON isolated version of IC and its working fine . Now i am testing same code with DE controlled using ADM 2483 .In Non isolated version i could not able to communicate.Is there any proven circuit or IC where it has been tested with above controller in Isolated version.
I have attached my schmatic for reference,
http://love2007.spaces.eepw.com.cn/articles/article/item/100739
This circuit i have tested with DISPIC33FJ128GP706(Which is operated 3V3) But not working with PIC16F1938 or similar. I have used pull up resistor 10K instead of 4.7k/4.5k resistor .It didnt worked. I wont get proper request from slave device itself. kindly suggested any proven circuit with above ic.
I have attached my schmatic for reference,
http://love2007.spaces.eepw.com.cn/articles/article/item/100739
This circuit i have tested with DISPIC33FJ128GP706(Which is operated 3V3) But not working with PIC16F1938 or similar. I have used pull up resistor 10K instead of 4.7k/4.5k resistor .It didnt worked. I wont get proper request from slave device itself. kindly suggested any proven circuit with above ic.