For example, if bits 00 and 02 are set to 1, points 3 and 1 are on priority scan. All other bits are reserved and contain 0. Applicaton Layer In order to use word 00 to control point-on-priority, you must configure the Siemens Milltronics SmartLinx instrument to permit this. For each point, set Parameter P720 to 1 (manual, BIC-II; or SmartLinx SPA) to permit priority control for that point. Note: Point on Priority only applies to the XPL+. Word 1: Parameter Number, MPA Specifies the parameter number for the returned values in words 21 to 30. See Read Block on page 30. Word 2: Secondary Index, MPA Specifies the secondary index for the parameter specified by word 1.
This word is ignored for parameters that don’t use multiple indexes. See Parameter Indexes on page 17 for more information. Word 3: Decimal Place, MPA Specifies the number of decimal places to shift the returned values in words 21 to 30 of the Read Block. Positive values indicate that the decimal place shifts to the left, and negative values indicate that the decimal place shifts to the right. For example: word 3 = 1: all returned values have the decimal place shifted 1 space to the left and a returned value of 5,213 is interpreted as 521.3 word 3 = –1: a returned value of 5,213 is interpreted as 52,130 Word 4: Format, MPA Sets the format for the returned values in words 21 to 30.
0 = normal 1 = percent Note: When the format is selected as “percent” the decimal place value (word 3 of the Write block) is ignored and two decimal places are always used. For example, a value of 5947 represents 59.47%. Word 5: Parameter, SPA Specifies the requested parameter number for Single Parameter Access (SPA). (See page 20.) Word 6: Primary Index, SPA Specifies the primary index number for the parameter in word 5. Page 28 SmartLinx DeviceNet – INSTRUCTION MANUAL 7ML19981BH02 bit 09 08 07 06 05 04 03 02 01 00 index 0 0 0 0 0 0 0 1 0 1