Automatic control function programming manual ladder language

Return code
If OK
Not significant
Error
-1: n negative
Programming error causing a CPU fault
Access to a prohibited address:
- &source parameter error,
- &dest parameter error,
- &source+n outside authorised area,
- &dest+n outside authorised area.
6.6 Read the Parameters Stored on the Stack cpyarg
Syntax
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cpyarg(&dest, n)
&dest: Address of the memory block where the system copies the
arguments.
n: Number of arguments to be copied (maximum 6).
Copies n arguments from the stack into local memory starting at address &dest, when the module is called by sp().
Operation
Each argument occupies 32 bits.
Function cpyarg() must be called at the beginning of the %SP module before the stack is modified, such as would occur
by a call to an internal label of the module (call()).
If the number of arguments n specified is greater than the number of arguments m passed during the call, the system
does not generate an error but obviously only the first m arguments are significant.
Return code
If OK
Not significant.
Error
-1: n negative, zero or greater than maximum number authorised
Programming error causing a CPU fault
Access to a prohibited address:
- &dest parameter error,
- &dest+n outside authorised area.