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We will discuss it in depth in the next posts as how to communicate with drives, HMI, Energy Meter etc. In Cp1E fixed DM words are defined for sending these data format to slave devices.ĭM1300-DM1399 are used for this purpose, once you write the desired format then just on the system bit A641.0 to send the above query to the desired slave device. In Modbus, the standard format is:-ĭevice address - function code - data -error checkĪll the Modbus supporting device follow this standard format. See below picture for settings.Īfter all these settings your CP1E is ready to communicate in MODBUS but now you have to write the Program for communication in a standard data format. Hurry !! now your CP1E is ready for Modbus Communication, all you need is that connect the slave modbus devices which u wish to connect in MODBUS network. After making these settings save it and download settings to PLC and re-power PLC. Remember baud rate should be same on both the sides. After go to Project Workspace and right click on settings, select the serial-option port tab and in mode select MODBUS RTU Master and baud rate as supported by the slave side. Just Open CX-Programmer and select CP1E model. Now all the necessary hardware settings are down, Now we just need to do some settings in PLC. Always remember to connect "+" with "+" and "-" with "-". Connect the other end of wires to the device which u want to communicate in MODBUS. Recommended Article: PLC Program for Omron Encoder Interfacing with Omron PLCĬonnect as shown in below diagram. Remember always use a shielded cable in MODBUS communication. Connect two wire on 1 and 2 or 3 and 4, and shield to FG. Front side has 1)RDA- 2)RDB+ 3)SDA- 4) SDB+ 5) FG namely. At the front side it has 5 terminals for the connection and at the back side, it has DIP switches.
Note:- Click on the photo for a clear view.Īlso, take a look that how CP1W-CIF11 RS485 port looks. See below table to know DIP switch Setting for MODBUS Communication. Since it will be a 2 wire connection so put all the DIP SWITCHES ON except Dip Switch number 4. First of all CP1W-CIF11 is required i.e RS485 Port and you have to set its DIP switches. To setup Modbus Communication in Omron CP1E, we have to make some settings. But modbus RTU is mostly used to communicate with PLC.
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