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Chapter 4. Ladder Diagram (LD) Programming
COMMREQ Example 2
The MOVE function can be used to enter the command block contents for the COMMREQ described
in example 1.
Input IN of the COMMREQ specifies %R00016 as the beginning reference for the command block.
Successive references contain the following:
%R00016
%R00017
%R00018
%R00019
%R00020
%R00021
%R00022 to end of data Data Block
MOVE functions supply the following command block data for the COMMREQ.
▪
The first MOVE function places the length of the data being communicated in %R00016.
▪
The second MOVE function places the constant 0 in %R00017. This specifies NO WAIT mode.
▪
The third MOVE function places the constant 8 in %R00018. This specifies the register table as
the location for the status pointer.
▪
The fourth MOVE function places the constant 512 in reference %R00019. Therefore, the status
pointer is located at %R00513.
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PACSystems* RX7i, RX3i and RSTi-EP CPU Programmer's Reference Manual
Data Block Length
Wait/No Wait Flag
Status Pointer Memory Type
Status Pointer Offset
Idle Timeout Value (Because this parameter is ignored in NO WAIT mode, no value is
input).
Maximum Communication Time Value (Because this parameter is ignored in NO
WAIT mode, no value is input).
GFK-2950C
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