Example 1: If you want only Instrument status, and to read the first 7 point readings, then the chart is: Example 2: If you want only SPA, then the chart is: The input data block (Read block) is now 8 words in size (16 bytes), and the Word numbers have shifted to a lower value. The input data block (Read block) is now 7 words in size (14 bytes), and the Word numbers have shifted to a lower value. Appendix A New Read Block Data map: New Read Block Data map:
Original Read Block Data map for Level Products Page 52 SmartLinx DeviceNet – INSTRUCTION MANUAL 7ML19981BH02 Name of area P762 Point value Memory size for Read block per value value * memory size Status 1 1 1 1 Reading 2 7 1 7 Alarm 3 0 1 0 Point on Priority 4 0 0 0 MPA 5 0 14 0 SPA 6 0 7 0 Operatin g mode 7 0 0 0 Total words: 8 Name of area P762 Point value Memory size for Read block per value value * memory size Status 1 0 1 0 Reading 2 0 1 0 Alarm 3 0 1 0 Point on Priority 4 0 0 0 MPA 5 0 14 0 SPA 6 1 7 7 Operatin g mode 7 0 0 0 Total words:
7 Word Description 0 Instrument status 1 Reading for point 1 2 Reading for point 2 3 Reading for point 3 4 Reading for point 4 5 Reading for point 5 6 Reading for point 6 7 Reading for point 7 Word Description 0 Parameter number 1 Parameter primary index 2 Parameter secondary index 3 Parameter returned value 4 Decimal place 5 Format 6 Read/Write flag Words Description Access Data Type 0 instrument status bitmapped 1-10 point reading direct integer 11-20 point alarm and status bitmapped 21-30 returned values MPA integer 31 decimal place integer 32 format 0/1 33 parameter number integer 34 parameter secondary index integer