Vector VEC-VA Series - RD_*_BY_SYM ( Read the Value of the PDD Variable ); WR_*_BY_SYM (Write the Value of the PDD Variable)

VA Motion Controller Programming Manual
265
data. If the program has a stack overflow, a string error, or ADivide by
0
, you can call this
command to automatically restart the execution of the program.
LD IN
ST PLC_STOP_1.IN
CAL PLC_STOP_1
ST
programming
language
PLC_ STOP_ 1 ( IN )
Note : IL, ST language programming needs to insert variable IN or use constant in the
current POU variable worksheet
P LC_STOP
instruction processed data type
Input and
output
type of data
description
IN
BOOL
The rising edge is valid,
the PLC stops
10.6.19 RD_*_BY_SYM ( Read the value of
the PDD variable )
 Instruction function overview: RD_*_BY_SYM includes the following instructions for
reading variables of different data types of PDD
RD_BOOL_BY_SYM
RD_BYTE _BY_SYM
RD_WORD_BY_SYM
RD_DWORD_BY_SYM
RD_SINT_BY_SYM
RD_INT_BY_SYM
RD_DINT_BY_SYM
RD_USINT_BY_SYM
RD_UINT_BY_SYM
RD_UDINT_BY_SYM
RD_REAL_BY_SYM
RD_STRING_BY_SYM
RD_TIME_BY_SYM
RD_INPUT_GROUP
PDD
is a method that can access the value of a variable by the name of the variable. It is a
method used when the controller kernel layer accesses the value of the
PLC
variable defined
by
MULTIPROG
. The
RD_*_BY_SYM
instruction is temporarily unavailable, and the general user
directly reads and writes. The variables are fine.
10.6.20 WR_*_BY_SYM (write the value of
the PDD variable)
 Instruction function overview: WR_*_BY_SYM includes the following instructions for