Word 11: Read/Write Flag, SPA This word instructs the read/write application of word 8. Applicaton Layer 0 = read parameter as described by words 5, 6, 7, 9 and 10; word 8 ignored 1 = set parameter to the value described by words 5 to 10 Word 12: Operating Mode, SPA This word sets the operating mode of the Siemens Milltronics SmartLinx instrument. The operating mode can get out of sync if the remote instrument resets back to run mode locally. This can happen due to a time-out or through local programming. The mode is always reported correctly through the Read block. (See bit 10 of Word 0:
Instrument Status on page 25.) To reset the instrument to program mode, write 0 to synchronize the SmartLinx module with the instrument and then write 1 to set the instrument to program mode. 0 = run mode 1 = program mode Read Block Values in words 0 to 10 and word 31 are directly available; no write operation is required to request them. Values in words 11 to 31 are determined by the write operation that requested them, either MPA or SPA. See Write Block on page 21.
Page 24 SmartLinx DeviceNet – INSTRUCTION MANUAL 7ML19981BH02 Words Description Access Data Type 0 instrument status bitmapped Direct 1-10 point reading integer 11-20 returned values MPA integer 21 decimal place integer 22 format 0/1 23 parameter number integer 24 parameter secondary index integer 25 parameter number integer 26 primary index integer 27 secondary index integer SPA 28 Value Returned integer 29 decimal place integer 30 Format 0/1 31 read/write flag 0/1