xLadder user manual-V2.0.0.6

SMW22

Scan time of the last scan.

SMW24

Minimum scan time

SMW26

Maximum scan time

9.Easy ladder communication

9.1 PR series PLC basic introduction of network communication

PR series PLC is designed to solve your communications and networking needs.It

supports both simple networks and complex networks .Easy ladder makes it simple

to set up and configure your network .

Master slave network definition

PR series PLC supports master slave network.It can be used as the master station or

the slave station in the network.Easy ladder is always used as the master station.

Master station:The master station can send a request to another device in the

network.The master station can also respond to requests from other master stations

in the network.

Slave station:The device which is configured to be the slave station can only respond

to requests from a master station;Slave station will not take the initiative to issue a

request.

The concept of baud rate and network address

The speed of transmission of data in the network is called the baud rate.Units are

kbaud and Mbaud.For example, 19.2 kbaud indicates that 19200 bits are transmitted

per second.

Each device must be the same baud rate in the network.So the communication speed

of the network is decided by the minimum baud rate of equipment.

The range of PR series PLC baud rate is 1200 bps~115200 bps.The default value is

9600bps.

Network address is a unique number that you specify for each device on the network.

Network address ensures that data is delivered to the correct device.The range of PR

series PLC network addresses is 0~255.If PLC has two ports, each port can have a

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