Mitsubishi Electric MELSEC iQ-R04ENCPU, User Manual

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APPX
Appendix 3 Buffer Memory
RWw offset/size information
■
RWw offset/size information (Un\G19968 to Un\G20209)
The start number and the number of points of RWw 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 = 19968 + (station No. - 1)

2
• Size buffer memory address = 19969 + (station No. - 1)

2
RWr offset/size information
■
RWr offset/size information (Un\G20224 to Un\G20465)
The start number and the number of points of RWr 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 = 20224 + (station No. - 1)

2
• Size buffer memory address = 20225 + (station No. - 1)

2
Own station information
The information of the own station on the network is stored.
■ Own station (network card) information (Un\G20512 to Un\G20515)
■
Own station (controller) information (Un\G20520 to Un\G20536)
Address Description
Un\G19968 Station No.1 offset
Un\G19969 Station No.1 size (in units of words)
Un\G19970 Station No.2 offset
Un\G19971 Station No.2 size (in units of words)

Un\G20206 Station No.120 offset
Un\G20207 Station No.120 size (in units of words)
Un\G20208 Station No.0 offset
Un\G20209 Station No.0 size (in units of words)
Address Description
Un\G20224 Station No.1 offset
Un\G20225 Station No.1 size (in units of words)
Un\G20226 Station No.2 offset
Un\G20227 Station No.2 size (in units of words)

Un\G20462 Station No.120 offset
Un\G20463 Station No.120 size (in units of words)
Un\G20464 Station No.0 offset
Un\G20465 Station No.0 size (in units of words)
Address Name Description
Un\G20512 Manufacturer code The master/local module information of the own station is
stored.
Un\G20513 Model type
Un\G20514 Model code
Un\G20515 Version
Address Name Description
Un\G20520 Controller information valid/invalid flag Whether the value stored in the own station (controller)
information is valid or invalid is stored.
• 0: Invalid
• 1: Valid