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APPLICATION GUIDE Overview Screen – Configuring the Modbus Memory Map At this point, the Application Process Values, Status Bits, and Control Bits will have been determined. Otherwise, you can follow through with the examples provided. The following tables, also found in the BW500 User Manual, can be reviewed to determine what will be monitored and or controlled from the RD500. Please refer to the Modbus RTU/ASCII section of the BW500 User Manual for additional information regarding the Modbus Memory Map. Process Values Device State Command Control Description Process Values Device State Command Control Description 41,010 41,020 41,022 Long Word 16 Bit 16 Bit BW500 Register Type 32 Bit Long Word Bit Mapped 16 Bit Bit Mapped 16 Bit Access Read Only Access Read Only Access Read & Write Access RD500 Type LONG BIT BIT In this example, the Process Variables, Device State, and Device Control data will be programmed in the RD500 for data monitoring and logging. Identified in the following table are the Modbus registers and the required format of the registers. For each of the defined data, Process Value, Device State, and Device Control, an individual configuration is required as the register format is different for each. SITRANS RD500 Remote Data Management for Weighing Applications AG082211 8 of 17
