Yaskawa YASNAC PC NC PLC Programming Manual - Manual (Page 117)

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YASNAC PCNC PLC Programming Manual Chapter 6: PLC Instructions
• Designation of the data size (IPSH X)
IPSH = 0: The data stored in the data table is 1-byte data.
IPSH = 1: The data stored in the data table is 2-byte data.
IPSH = 2: The data stored in the data table is 4-byte data.
• Designation of read/write processing (RW)
STR = 0: Data is read from the data table.
STR = 1: Data in the data table is rewritten.
• Reset (RST)
RST = 0: Error output R1 is not reset.
RST = 1: Error output R1 is reset.
• Execution command (ACT)
ACT = 0: The binary-index modifier data transfer instruction is executed.
R1 remains unchanged.
ACT = 1: The binary-index modifier data transfer instruction is not executed.
• Error output (R1)
If an error occurs when this instruction is executed, “1” is set for “R1” (R1 = 1)
to indicate the occurrence of an error.
An error occurs in the following cases:
• A numeric value greater than the size of the data table is set.
• The size of the data is not a multiple of the designated data size.
Example: Data size.
Byte 1 × Nbytes
Word 2 × Nbytes
Double-word 4 × N bytes