Mitsubishi Electric MELSEC iQ-R Series Reference page 48

Array handling function block library reference, programmable controller

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Functional description

FB compilation method

FB operation

2 DETAILS OF THE FB LIBRARY

2.8 M+ArrayHandling_Compare_R

Description

(6) For the single-precision real number, data are compared by using the following formulas considering a rounding error.

When S (difference) is smaller than E (tolerance) (S < E), the values of two data are regarded as matched.

• S: Difference = |Input value 1 - Input value 2|

• E: Tolerance = Rounding error (1.1920929E-007)

(7) It takes multiple scans until the comparison processing is completed. Thus, do not change the target input array data

sets until the processing is completed. The number of points with the comparison completed is output to

o_udOutAryNum (number of output data points). When the processing is completed, o_bOK (normal completion) turns

on.

(8) If a value out of the range is set in i_udSize (number of data points), o_bErr (error completion) turns on and the

processing of the FB is interrupted. In addition, 105H is stored in o_uErrId (error code). For the error code, refer to the

list of error codes. ( Page 48 List of error codes)

(9) If a value out of the range is set in i_uDataType (data type selection), o_bErr (error completion) turns on and the

processing of the FB is interrupted. In addition, 103H is stored in o_uErrId (error code). For the error code, refer to the

list of error codes. ( Page 48 List of error codes)

(10)When a single-precision real number is set in i_uDataType (data type selection) and the value stored in the file register

(ZR) is not a single-precision real number, o_bErr (error completion) turns on and the processing of the FB is

interrupted. In addition, 200H is stored in o_uErrId (error code). For the error code, refer to the list of error codes. (

Page 48 List of error codes)

(11)If i_bEN (execution command) is turned off before o_bOK (normal completion) or o_bErr (error completion) turns on,

o_bErr (error completion) turns on in one scan. In addition, 205H is stored in o_uErrId (error code) in one scan. For the

error code, refer to the list of error codes. ( Page 48 List of error codes)

Subroutine type

Pulse execution type (multiple scan execution type)

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