Chapter 6 Applied Instructions Symbol S 1 ： Communication port number S 2 ： VFD station address 6_ S 3 ： Function code S ： Source and received data Explanation 1. S 1 sets the communication port number. The number for COM1 is 1 and COM2 is 2. If the value exceeds the valid range, the instruction does not receive any communication data. 2. S 2 sets the station address for the VFD AC motor drive. 0 indicates that the instruction uses the broadcast mode. The range is between 0–254, and the instruction is not executed if this value is out of the valid range. 3. S 3 is the communication function code, and S is the source or received data as explained in the following table.
6-567 API Instruction code Operand Function 1814 VFDRW S1, S2, S3, S Serial communication instruction exclusive for Delta AC motor drive Device X Y M S T C HC D FR SM SR E K 16# “$” F S1 S2 S3 S BOOL WORD DWORD LWORD UINT INT DINT LINT REAL LREAL TMR CNT STRING Data type S1 S2 S3 S Pulse instruction 16-bit instruction 32-bit instruction - ES3 - S3 S3 function name S source and received data Remark function code 0 Reset due to abnormality Unused Any value can be stored in S.