Download Series 90-30/20/Micro PLC CPU Instruction Set

10
Search Functions
Use the appropriate Search function listed below to search for all array values for that particular
operation.
Abbreviation
Function
Description
SRCH_EQ
Search Equal
SRCH_NE
Search Not Equal
Search for all array values equal to a specified value.
Search for all array values not equal to a specified value.
SRCH_GT
Search Greater
Than
Search for all array values greater than a specified value.
SRCH_GE
Search Greater
Than or Equal
Search for all array values greater than or equal to a
specified value.
SRCH_LT
Search Less Than
Search for all array values less than a specified value.
SRCH_LE
Search Less Than
or Equal
Search for all array values less than or equal to a specified value.
Each function has four input parameters and two output parameters. When the function receives
power, the array is searched starting at (AR + input NX). This is the starting address of the array
(AR) plus the index into this array (input NX).
The search continues until the array element of the search object (IN) is found or until the end of
the array is reached. If an array element is found, output parameter (FD) is set ON and output
parameter (output NX) is set to the relative position of this element within the array. If no array
element is found before the end of the array is reached, then output parameter (FD) is set OFF and
output parameter (output NX) is set to zero.
The valid values for input NX are 0 to LEN — 1. NX should be set to zero to begin searching at
the first element. This value increments by one at the time of execution. Therefore, the values of
output NX are 1 to LEN. If the value of input NX is out-of-range, (< 0 or ≥ LEN), its value is set
to the default value of zero.
(enable)
(starting address)
(input index)
(object of search)
10-6
_____
|
|
—|SRCH_|
|
|
| EQ_ |
|
|
| WORD|
|
|
—|AR FD|—
| LEN |
|00001|
—|NX NX|— (output index)
|
|
|
|
—|IN
|
|_____|
Series 90™-30/20/Micro PLC CPU Instruction Set Reference Manual – June 1999
GFK-0467L