Sepam - HV/MV Protection and control units (ENG) - Trinet

Appendix (cont’d)Reading of N bits:function 1 or 2In the rest of the document, MS is used as the abbreviation of Most Significantand LS as the abbreviation of Least Significant.Function 1: reading of output bits or internal bits,Function 2: reading of input bits.The number of bits to be read must be less than or equal to 2000.Requestslavenumber1 or 2addressof 1st bit (MS + LS)numberof bits to be readCRC 161 byte 1 byte2 bytes 2 bytes2 bytesReplyslavenumber1 or 2numberof bytesread1st bytereadlastbytereadCRC 161 byte 1 byte 1 byte N bytes2 bytesByte detailslast bit transmittedfirst bit transmittedThe bits that are not used in the byte are set to zero.ExampleReading of bits 204 to 211 of slave n° 1:c request01 01 C0040ECRC 16c replyC00BC004C011C00C01 01 02 10101001 00101110CRC 16A92E40 Jbus/Modbus communication