Word 4: Format, MPA Sets the format for the returned values in word 11 to 20. 0 = normal Application Layer 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. Word 7: Secondary Index, SPA Specifies the secondary index for the parameter in word 5. This word is ignored for parameters that don’t use multiple indexes.
See Parameter Indexes on page 17 for more information. Word 8: Value, SPA This word contains the value written to the specified parameter and index. The format of this word is specified by words 9 to 10. To write a value, ensure word 11 = 1 and word 12 =1. (See also Data Types on page 42.) Word 9: Decimal Place, SPA This word specifies the number of decimal places for the value in word 8 of the Write Block, and also for the parameter value returned in word 28 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 9 = 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 9 = –1 a returned value of 5,213 is interpreted as 52,130. Word 10: Format, SPA This word sets the format for the value in word 8 of the Write Block and word 28 of the Read Block. 0 = normal 1 = percent 7ML19981BH02 SmartLinx DeviceNet – INSTRUCTION MANUAL Page 23