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- xN indicates the number of bytes that read or write. Valid values for N are 1, 2, 4, 8 (in combination with I, U, F), 6 for T type, and an arbitrary number for C type.
- A letter defines the type of I/O tag. Besides standard I, U, F, B, two extra types have been added:
- C - text string of fixed length (e.g. x10.C3.1001 is a 10-character string on address 1001)
- T - time stamp with length of 6 bytes (ss:mi:hh dd:mm:yy)
- The meaning of other parameters is in compliance with the standard mode.
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- Ver. 1.0 - November 27th, 2006 - document creating.
- Ver. 1.1 - November 21st, 2007 - document update.
- Ver. 1.2 - April 24th, 2009 - document update.
- Ver. 1.3 - November 3rd, 2010 - document update.
- Ver. 1.4 - December 6th, 2010 - document update.
- Ver. 1.5 - September 5th, 2022 - document update (support for 8-byte values in the extended format).
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