IAI PSEL, Operation Manual

Page: 748 / 1062

[7] I/O, Flag Operation
254
z
WT (Wait for I/O port, flag)
Command, declaration Extension
condition
(LD, A, O, AB, OB)
Input condition
(I/O, flag)
Command,
declaration
Operand 1 Operand 2
Output
(Output, flag)
E N, Cnd Cmnd Operand 1 Operand 2 Pst
Optional Optional WT I/O, flag (Time) TU
Applicable models
All models [Refer to Section 5.1 for details of models]
{
[Function] Wait for the I/O port or flag specified in operand 1 to turn ON/OFF.
The program can be aborted after the specified time by setting the time in
operand 2.
The setting range is 0.01 to 99sec.
The output will turn ON upon elapse of the specified time (only when operand 2 is
specified).
(Note) A local flag cannot be entered in operand 1.
WT
ON ··············· Wait for the applicable I/O port or flag to turn ON.
OF ··············· Wait for the applicable I/O port or flag to turn OFF.
[Example 1] WTON 15 Wait for input port 15 to turn ON.
[Example 2] WTOF 308 10 Wait for 10sec for output port 308 to turn OFF.
[Example 3] LET 1 600 Assign 600 to variable 1.
WTON *1 Wait for the content of variable 1 (flag 600) to turn
ON.
[Example 4] LET 1 8 Assign 8 to variable 1.
LET 2 5 Assign 5 to variable 2.
WTOF *1 *2 Wait for the content of variable 2 (5sec) for the
content of variable 1 (input port 8) to turn OFF.