Yaskawa MP900 Series Ladder Programming Manual - Manual (Page 293)

5.9 Table Manipulation Instructions
5.9.9 Clear Queue Table Pointers (QTBLCL)
5-224
( 2 ) Format
∗ 1. Optional.
∗ 2. C and # registers cannot be used.
„
Error Codes
( 3 ) Programming Example
In the following programming example, the queue pointers for the specified queue table are initialized when switch 2
(DB000003) turns ON.
When the power is turned ON, values of the read pointer and write pointer are undefined. Always execute the QTBLCL instruc-
tion before using the QTBLR, QTBLRI, QTBLW, or QTBLWI instruction.
An operation error may occur if the QTBLR, QTBLRI, QTBLW, or QTBLWI instruction is executed without first executing the
QTBLCL instruction.
Parameter Name
Applicable Data Types
B W L F A Index Constant
Output data (Out) *1 × { *2 × × × { ×
Status (Sts)) *1 { *2 × × × × × ×
Status
Output data
Table name
Icon:
Key entry: QTBLCL
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.
INFO