ProSoft Technology MVI56-BAS - Manual (Page 119)

MVI56-BAS ♦ ControlLogix Platform BASIC CALLs Syntax
BASIC Module (DB/BAS Compatible) User Manual
ProSoft Technology, Inc. Page 119 of 234
December 13, 2011
CALL 58: Check CLX MSG
Use CALL 58 to determine if the CLX processor has written the module data
using the MSG instruction since the last time it was checked.
Syntax:
CALL 58
POP A
Where:
A = 0  CLX has not written to the module
1  CLX has written to the module
Example:
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125 GOSUB 520
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500 REM This routine waits CLX MSG instruction
510 REM to update the module.
520 CALL 58: POP X
530 CALL 58: POP X
540 IF(X=0) THEN GOT 530
550 RETURN
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