SERIES COMMUNICATION CARD

Mô tả sản phẩm :

The communication protocol of CHV inverters is asynchronous serial master/slave ModBus communication protocol. Only one device (the master) can establish protocol (called “query/command”) over the entire network. Other devices (the slave) can only provide data to make response to the “query/command” of the master or take the corresponding actions according to the “query/command” of the master. Here the master refers to PC, industrial control device or programmable logic controller (PLC), and the slave refers to CHV inverters or other control devices with the same communication protocol. The master can conduct independent communications with slave and can send broadcast messages to all slaves. For the “query/command” of the master who makes independent access, the slave should return a message (called response); for the broadcast messages sent by the master, the slave does not need to make a response to the master.