Mitsubishi Electric MELSEC-Q/L

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7 APPLICATION INSTRUCTIONS

7.13 Data Control Instructions

Precautions

• There are two searching methods that depend on whether SM750 is on or off.

• When the scaling conversion data are set in ascending order, the searching methods change from one to the other

depending on the SM750 status. Therefore, the processing speed also changes. The number of searches determines the

processing speed. Fewer number of searches make the processing run faster.

Operation error

• In any of the following cases, an operation error occurs, the error flag (SM0) turns ON, and an error code is stored into SD0.

SM750 Searching method Range of number of searches

OFF Sequential search 1  Number of times  32767

ON Binary search 1  Number of times  15

• If the data processing speed with the sequential search rises:

If the number of coordinates is highest and the input value (S1) is within the coordinate range from 1 to 15 point, the number of sequential searches will be 15 or

smaller. Therefore, the data processing speed with the sequential search will rise.

• If the data processing speed with the binary search rises:

If the maximum number of searches is 15 and the input value (S1) is out of the coordinate range, 16 or over, the number of binary searches will be equal to the

number of sequential numbers or smaller. Therefore, the data processing speed with the binary search will rise.

Error

code

Error details Q00J/

Q00/

Q01

QnH QnPH QnPRH QnU LCPU

4100 The X coordinates of the scaling conversion data positioned before the point

specified in (S1) are not set in ascending order. (However, this error is not

detected when SM750 is on.)

The input value specified in (S1) is not within the range of the scaling

conversion data set.