8/3/2020 12:57 PM | |
Posts: 1 Rating: (0) |
Hi, we tried a similar hardware configuration using ET220SP and CM Ptp to communicate with a Modbus slave device (the hardware architecture is attached). We have used the following configuration for the CM Ptp device Potential Group: Enable New Potential group Modbus Parameter: From CPU Interface: Half-Duplex (RS 485) 2-wire operation Receive Initial State: None Port Configuration: Freeport/Modbus Diagnostic: Enable Diagnostic Interrupts Receive Buffer: 255, Clear Buffer on startup The Modbus_Comm_Load configuration and Modbus_Master configuration is attached as screenshot We have also set the parameter MODE in the Modbus_Comm_Load_DB as 4. With this configuration, we have been trying to communicate with Modbus slave. But the communications are not getting through and the following observations were made. The Modbus_Comm_Load Done bit becomes true momentarily and then returns to false The Modbus_Master status starts from 16#7000 to 16#7002 for a moment and then throws the following error codes 16#8188 ------------------------------------------------------------------------------------------ AttachmentCM Ptp RS 485.zip (56 Downloads) |
Last edited by: Jen_Moderator at: 08/03/2020 13:24:33New subject after splitting |
|
Follow us on