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13 CONTENTS AND REGISTRATION OF USER FRAMES FOR DATA COMMUNICATION
13.1 User Frame Types and Contents During Communication
Default registration frame (read only)
This frame is registered in C24 in advance and can be used in the same way as the other user frames.
Overview
The default registration frame is registered in the operating system ROM of C24.
The one-byte data (code: 01H to FEH) and a maximum of five-byte data is registered, and can be used for read-only. (Frame
No.: 1H to 3E7H)
Each of these frames is treated as a user frame.
Default registration frame registered data and data contents transmitted and received
The codes of the registration data for default registration frame and the data contents that are transmitted and received are
shown below.
*1 The combination of FFH, H in the registered code is used to handle variable data (sum check code, C24 station number, etc.) as
part of the user frame.
The data contents that are transmitted and received and the byte count depend on the code combined with registered code FFH.
For combination of registered code to handle variable data and the data contents transmitted/received, refer to the following section.
Page 251 Variable data
Default registration frame No.
(HEX (DEC))
Registration data code
(1st byte to nth byte)
Registered
byte count
Frame byte count Data contents transmitted
and received
Data contents
1H(1) 01H 1 1 (Data of code shown at the left)
2H(2) 02H STX
FEH(254) FEH (Data of code shown at the left)
FFH(255) (For variable data designation)
100H(256) 00H 1 1 NUL
101H(257) FFH 1 (Data of code shown at the left)
102H(258) 0DH, 0AH 2 2 CR, LF
103H(259) 10H, 02H DLE, STX
104H(260) 10H, 03H DLE, ETX
105H(261) 00H, FEH 2 2 (Data of codes shown at the left)
106H(262) 00H, 00H, FEH 3 3 (Data of codes shown at the left)
107H(263) 03H, FFH, F1H 3 2 ETX, sum check code
*1
108H(264) 03H, FFH, F1H, 0DH, 0AH 5 4 ETX, sum check code, CR, LF
*1
109H(265) (None)
10DH(269)
10EH(270) FFH, EEH 2 1 Sum check code
*1
110H(272) FFH, F0H
111H(273) FFH, F1H
113H(275) FFH, F3H
114H(276) FFH, F4H
116H(278) FFH, F6H
117H(279) FFH, F7H
119H(281) FFH, F9H
11FH(287) FFH, FFH Registered code FFH data (1 byte)
120H(288) (None)
3E7H(999)
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