Mutchus

In this tutorial I am going to brief you on how to establish a communication between two arduino boards through SPI(Serial Peripheral Interface). SPI is also called as 4 wire interface, because it uses four pins to transmit and receive data, they are MISO (Master In Slave Out), MOSI(Master Out Slave In), SCK – This provides the clock signal for data transfer, usually from master to slave. And SS pin- It selects the slave device, it is an active low signal given by Master device. After completing the data transfer with one slave device, the master device pulls up the SS pin to high. In SPI protocol, it is possible to connect more than one slave to a master device. The master device can communicate with any slave connected to the bus at any time, but the slave can communicate only to the master. Whenever the master device wants to send a data to slave, it pulls down the SS Pin and the slave will listen to data. The master device is controlling the clock signal for data transfer, so the s...

Difference between Delta PLC EH2 series and EH3    The capacity of the Ladder program is upgraded to 30k Steps, and the number of D devices is increased to 12000. ·         The capacity of the memory card has doubled. To prevent the wrong insertion, the new memory card and the old one are not interchangeable ·          Some function cards of DVP-EH2 PLC can not be used in DVP-EH3. The function cards which can be used are all communication cards, 02AD card and 02DA card. ·          When the position of the basic instruction is below 16k Step, the execution speed does not make any change. ·         When its position is above 16k Step, the execution speed becomes 2.8μs. ·          The execution speed of MOV instruction is improved to 4.8μs, and that of other application instructions is also im...