Fujitsu Siemens Computers Standard Jumper Cable / Network Cable without jumper Siemens S7 300 - Manual (Page 3)

Series HMI Connection Manual
V1.02 Revision January, 2012
205
2、 MD12 which Data Type is Byte and Data Length is Double Word，when it used for one
word Numeric Entry, it will occupy four addresses MB12,MB13,MB14 and MB15; But
data only stored in MB14 and MB15.
3、 IW3 which Data Type is Byte and Data Length is 1 Word , when it used for double word
Numeric Entry, it will occupy for addresses IB3,IB4,IB5 and IB6，order from highest to
lowest byte is IB5,IB6,IB3 和 IB4.