Iai-america XSEL-KX Bedienungsanleitung PDF herunterladen (Seite 214)

198

Part 4 Commands

 TMRD (Set READ timeout value)

Extension condition

(LD, A, O, AB, OB)

Input condition

(I/O, flag)

Command, declaration

Output

(Output, flag)

Command,

declaration

Operand 1 Operand 2

Optional Optional TMRD

Timer

setting

Prohibited CP

[Function]

Set the timeout to be applied to a READ command.

The timer setting specified in operand 1 will set the maximum time the program will wait for

the character string read to end when a READ command is executed.

If the end character could not be read before the timer is up during the execution of the

READ command, a timeout will occur and the program will move to the next step.

(Whether or not a timeout has occurred can be checked from the return code to be stored in

a local variable (factory setting: variable 99) immediately after the READ command has been

executed. Specify an appropriate processing to be performed upon timeout, if necessary.)

Setting the timer to “0” will allow the READ command to wait infinitely, without timeout, until

the end character is read.

The timer setting is input in seconds (setting range: 0 to 99.00 seconds) including up to two

decimal places.

(Note)

TMRD is set to “0” in the default condition before TMRD setting is performed.

[Example]

SCHA

Set LF (=10) as the end character.

TMRD

Set the READ timeout value to 30 seconds.

OPEN

Open channel 1.

READ 1 2 Read the character string from channel 1 to column 2 until

LF is read.

TRAN

Assign the return code to variable 1.

CLOS

Close the channel.

SLCT Branch to the processing corresponding to each return

code.

(Note) Using a GOTO command to branch out of the

SLCT-EDSL syntax or to other branching

processing within the syntax is prohibited.

WHEQ

[1]

1 0 If the content of variable 1 is “0” (successful completion), [1]

will be performed. Accordingly, specify the processing to be

performed upon successful completion in [1].

WHEQ

[2]

If the content of variable 1 is “1” (timeout), [2] will be

performed. Accordingly, specify an appropriate processing

to be performed in [2], if necessary.

WHEQ

[3]

If the content of variable 1 is “2” (timer cancellation), [3] will

be performed. Accordingly, specify an appropriate

processing to be performed in [3], if necessary.

OTHE

[4]

If the content of variable 1 is other than “0,” “1” or “2,” [4]

will be performed. Accordingly, specify an error handling in

[4], if necessary.

EDSL

If any of the conditions was satisfied and the applicable

command has been executed as a result, the program will

proceed to this processing step.

Read completes successfully within 30 seconds → Variable No. 1 = 0

Timeout occurs → 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”. Refer to the explanation of READ

command for details.

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