IAI PSEL, Operation Manual

Page: 908 / 1062

[18] Communication
414
[Example] SCHA 10 Set LF (=10) as the end character.
TMRD 30 Set the READ timeout value to 30sec.
OPEN 1 Open channel 1.
READ 1 2 Read the character string from channel 1 to
column 2 until LF is read.
TRAN 1 99 Assign the return code to variable 1.
CLOS 1 Close the channel.
SLCT The processing flow branches out in accordance
with each return code.
(Note) Using a GOTO command to branch out of
an SLCT-EDSL syntax or to other branch
processing within the syntax is prohibited.
WHEQ 1 0
:
(1)
:
If the content of variable 1 is “0” (Completed
successfully), (1) will be executed. In (1), define
the processing that should take place upon
successful command execution.
WHEQ 1 1
:
(2)
If the content of variable 1 is “1” (Timeout), (2) will
be executed. In (2), define appropriate processing
to handle this situation, if necessary.
:
WHEQ 1 2
:
(3)
If the content of variable 1 is “2” (Timer cancelled),
(3) will be executed. In (3), define appropriate
processing to handle this situation, if necessary.
:
OTHE
:
(4)
If the content of variable 1 is not “0”, “1” or “2”, (4)
will be executed. In (4), define appropriate error
handling, if necessary.
:
EDSL Once one of the specified conditions was met and
the corresponding command has been executed,
the processing will move here.
Read completes successfully within 30sec
o
Variable No. 1 = 0
Timeout occurs
o
Variable No. 1 = 1
* The return code of READ command may not be limited to 0 or 1. The
variable to store the return code can be set in “Other parameter No. 24”.
(Main application Ver.0.21 or later) For details, refer to the explanation of
the READ command.