252
13 CONTENTS AND REGISTRATION OF USER FRAMES FOR DATA COMMUNICATION
13.1 User Frame Types and Contents During Communication
■Variable data designation contents, data contents transmitted and received, and handling by
C24
The table below shows the registered codes (FFH+00H) to (FFH + FFH) combinations for handling variable data, the data
contents that are transmitted and received, and how C24 handles the data.
*1 During data communication using a user frame that handles the final frame, the contents of the "sum check code" in the transmission
setting set by the parameter will be ignored.
Variable data registered
code
Data contents transmitted and received/C24 handling Calculating
range
Detailed explanation
1st byte 2nd byte
FFH 00H When transmitting: Transmits the data code 00H (NULL) data (1
byte).
When receiving: Skips the given part (1 byte) of the receive user
frame. (Skips the check and performs receive processing.)
Page 253 C24 processing
to the registered code
FFH+00H
01H Transmits and receives the host station number as 1-byte binary
code data (00H to 1FH).
Page 253 C24 processing
to the registered code
FFH+01H
04H Transmits and receives the horizontal parity code in the calculating
range using 1 byte of binary code data.
Range 1 Page 254 C24 processing
to registered codes FFH+04H,
FFH+05H, FFH+0AH, and
FFH+0BH
05H Transmits and receives the horizontal parity code in the calculating
range using 2-byte ASCII code data
0AH Transmits and receives the horizontal parity code in the calculating
range using 1 byte of binary code data.
Range 2
0BH Transmits and receives the horizontal parity code in the calculating
range using 2-byte ASCII code data
11H Transmits and receives the two's complement sum check code in
the calculating range.
Range 1 Page 255 C24 processing
to registered codes FFH+11H
and FFH+17H
17H Range 2
E5H Transmits and receives the sum check code in the calculating range.
(Excluding the last one frame)
*1
Range 3 Page 257 C24 processing
to registered code FFH+E5H
EBH Range 4 Page 257 C24 processing
to registered code FFH+EBH
EEH Transmits and receives the sum check code in the calculating
range.
*1
Range 1 Page 256 C24 processing
to registered codes FFH+EEH
to FFH+F9H
F0H
F1H
F3H
F4H Range 2
F6H
F7H
F9H
FFH Transmits and receives the registered code FFH data (1 byte).
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