Yaskawa MP900 Series Ladder Programming Manual - Manual (Page 286)

5.9 Table Manipulation Instructions
5.9.7 Read Queue Table (QTBLR and QTBLRI)
5-217
Instructions
5
[ a ] Parameter Table Configuration
[ b ] Error Codes
[ c ] Setting the Relative Row Numbers of Table Elements
( 3 ) Programming Example
In the following programming example, the specified column elements in array table data TBL1 are read and stored in
MW00010 to MW00012 when switch 2 (DB000002) turns ON.
Before switch 2 is turned ON, the table data is set as shown below by turning ON switch 1 three times while changing
the contents of MW00000 to MW00002. (Refer to information on the Write Queue Table instruction.)
The contents of table data TBL1 are given below.
ΠThe column data types are given in parentheses.
Address
Data
Type
Symbol Name Specification I/O
0 L ROW
Relative row number of
table elements Relative row number of table elements at source to
move (1 to 65,535)
IN
2 L COLUMN
First column number of
table elements First column number of table elements at source to
move (1 to 32,767)
IN
4 W CLEN
Number of column ele-
ments
Number of column elements to move (1 to 32,767) IN
5 W Reserved.
6 L RPTR Read pointer Read pointer of the queue after execution OUT
8 L WPTR Write pointer Write pointer of the queue after execution OUT
Error Code Error Name Meaning
0001 hex Table undefined The target table is undefined.
0002 hex Outside range of row numbers The row number of the table element is outside the target table.
0003 hex
Outside range of column num-
bers
The column number of the table element is outside the target table.
0004 hex Incorrect number of elements The number of target elements is invalid.
0005 hex Insufficient storage area The storage area is insufficient.
0006 hex Insufficient element type The data type specified for the element is wrong.
0007 hex Queue buffer error
An attempt was made to read from an empty queue buffer, or to write to a
full queue buffer by advancing the pointer.
0008 hex Queue table error The specified table is not a queue table.
0009 hex System error
An unexpected error was detected in the system during instruction execu-
tion.
Relative Row
Number
Row That Is Read Remarks
0 Read pointer row The pointer is advanced only for the QTBLRI instruction.
1 Read pointer row Pointer is not advanced.
2 Read pointer row – 1 Pointer is not advanced.
3 Read pointer row – 2 Pointer is not advanced.
: :
n Read pointer row – (n – 1) Pointer is not advanced.
Column
Row
1
(W)
2
(W)
3
(W)
1 11 12 13
2 21 22 23
3 31 32 33