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Text String Processing Instructions Section 3-33
For example, production plan data such as product names can be transferred
from the host computer to the PLC. Various operations such as inserting and
rearranging text strings can be then be performed at the PLC, thereby reduc-
ing the data processing load at the host computer.
ASCII Characters The ASCII characters that can be handled by text string processing instruc-
tions are shown in the following table.
3-33-2 MOV STRING: MOV$(664)
Purpose Transfers a text string.
Ladder Symbol
PLC
Text string
processing
Text string
Host computerHost computer
Text string
processing
S
P
Four leftmost bits
Four rightmost bits
S
D
MOV$(664)
S: First source word
D: First destination word