Zs (zero subroutine stack), Program flow, 0 returns stack to original condition – Yaskawa LEGEND-MC User Manual
Page 254: 1 eliminates one return on stack
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LEGEND-MC User’s Manual
ZS (Zero Subroutine Stack)
[Program Flow]
DESCRIPTION:
The ZS command is only valid from within an application program and is used to avoid returning from an
interrupt (either input or error). ZS alone returns the stack to its original condition. ZS1 adjusts the stack to
eliminate one return. This turns the jump to subroutine into a jump.
ARGUMENTS: ZS n
where
0 returns stack to original condition
1 eliminates one return on stack
USAGE:
OPERAND USAGE:
_ZSn contains the stack level for the specified thread where n = 0 or 1. The response, an integer between
zero and seven, indicates zero for beginning condition and 15 for the deepest value.
EXAMPLES:
While Moving
Yes
Minimum value
0
In a Program
Yes
Maximum value
16
Command Line
No
Default Value
n/a
Can be Interrogated
Yes
Default Format
n/a
Used as an Operand
Yes
Distributed Control
No, Local
II1
Input Interrupt on 1
#A;JP #A;EN
Main program
#ININT
Input Interrupt
MG "INTERRUPT"
Print message
S=_ZS
Interrogate stack
S=
Print stack
ZS
Zero stack
S=_ZS
Interrogate stack
S=
Print stack
EN
End