Mitsubishi Electric MELSEC iQ-R04ENCPU, User Manual

Page: 291 / 390

APPX
Appendix 3 Buffer Memory
289
A
■
Link special register (SW) (Un\G18464 to Un\G18975)
The SW value is stored.
RX offset/size information
■ RX offset/size information (Un\G19456 to Un\G19697)
The start number and the number of points of RX for each station are stored.
The offset and size of buffer memory areas for each station number (other than a station number 0) can be calculated using
the following formulas:
• Offset buffer memory address = 19456 + (station No. - 1)

2
• Size buffer memory address = 19457 + (station No. - 1)

2
RY offset/size information
■ RY offset/size information (Un\G19712 to Un\G19953)
The start number and the number of points of RY for each station are stored.
The offset and size of buffer memory areas for each station number (other than a station number 0) can be calculated using
the following formulas:
• Offset buffer memory address = 19712 + (station No. - 1)

2
• Size buffer memory address = 19713 + (station No. - 1)

2
Address b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
Un\G18464 SW0
Un\G18465 SW1

Un\G18975 SW1FFF
Address Description
Un\G19456 Station No.1 offset
Un\G19457 Station No.1 size (in units of words)
Un\G19458 Station No.2 offset
Un\G19459 Station No.2 size (in units of words)

Un\G19694 Station No.120 offset
Un\G19695 Station No.120 size (in units of words)
Un\G19696 Station No.0 offset
Un\G19697 Station No.0 size (in units of words)
Address Description
Un\G19712 Station No.1 offset
Un\G19713 Station No.1 size (in units of words)
Un\G19714 Station No.2 offset
Un\G19715 Station No.2 size (in units of words)

Un\G19950 Station No.120 offset
Un\G19951 Station No.120 size (in units of words)
Un\G19952 Station No.0 offset
Un\G19953 Station No.0 size (in units of words)