User`s manual
255
CHAPTER 11 DATA COMMUNICATIONS USING USER FRAMES
11
11.2 Data Reception
*1 User frames for reception
• The user frame for data reception can set up to a maximum of four combinations of the first frame and the last
frame, regardless of whether there is a specification.
• For a combination that specifies the first frame (with the first frame), it is necessary to specify the first frame even
in other combinations.
• For a combination that does not specify the first frame (without the first frame), the first frame cannot be specified
even in other combinations.
• A combination with the first frame and a combination without the first frame cannot be combined.
*2 If data of other than 30H to 39H and 41H to 46H are received as the data code of the arbitrary data area (including the
transparent code data), the Q series C24 ASCII-BIN conversion will generate an error.
*3 Receive data arbitrary data area
When the arbitrary data area is stored to the receive area, and the storage byte count is an odd number of bytes, the
receive data count shown below is stored to the receive data count storage area. (When ASCII-BIN conversion is
enabled, receive data count is the storage byte count when the arbitrary data area is converted to binary code and
stored to the receive area.)
• Word units: Receive data count = Number of bytes stored to receive area 2Fractions are truncated
• Byte units: Receive data count = Number of bytes stored to receive area (00H is stored to the upper byte of the
last data storage location of the receive area.)
When ASCII-BIN conversion enabled, make the arbitrary data area of the receive data an even number of bytes
excluding the additional code.
*4 Page 256, Section 11.2.1 (1)
*5 Page 257, Section 11.2.1 (2)
*6 Page 259, Section 11.2.1 (3)