Mitsubishi Electric MELSEC iQ-RJ71C24-R2 - Page 268

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13 CONTENTS AND REGISTRATION OF USER FRAMES FOR DATA COMMUNICATION
13.4 Registering/Reading/Deleting User Frames
■Registration data byte count designation (Un\G5, 6912, 6953, ..., 8142)
• The total number of bytes of registration data of user frame to be registered (written)/read is indicated.
• Accessing to the flash ROM
At the time of registration, the user writes the total number of bytes of registration data.
At the time of reading, the total number of bytes of registration data is stored.
• Accessing to the buffer memory
At the time of registration, the user writes the total number of bytes of registration data.
■User frame (Un\G6 to 45, 6913 to 6952, 6954 to 6993, ..., 8143 to 8182)
• During the registration, the user sequentially stores the registration data of the user frame to be registered in the order of
(L) and (H), beginning from the head area of the given area range.
• During the reading, the registration data of the registered user frame is stored with the same contents and arrangement as
when registering.
Ex.
Contents stored in the user frame storage area when a user frame to transmit and receive ETX, sum check code, CR, and LF
(registered codes: 03H, FFH, F1H, 0DH, 0AH) is registered to the flash ROM.
■User frame registration status (For registration number check) (Un\G517 to 541)
• The registration status of user frames to the flash ROM is stored with the values shown below.
• The contents of each area that indicates the registration status are shown below. The contents of the area are indicated in
one user frame number/1 bit form.
Ex.
02H 00H 3BH
02H
;
41H
A
31H
1
ABH
(12ABH)
12H 03H 0DH
03H FFH,F1H 0DH 0AH
32H 01H 0AH
(H) (L)
S
T
X
E
T
X
C
R
L
F
FFH, 03H
0DH, F1H
00H, 0AH
FFH,01H 3BH
Buffer memory
Head data
Address
Un\G6
Un\G7
Last data
Un\G8
(Part corresponding to
registered frame above)
(Data contents transmitted and received)
Arbitrary
data
User frame
(First frame)
User frame
(Last frame)
User frame register
code
Sum check code
Station No.
Transmission/reception
data corresponding to
register code
Transmission/recep
tion data code
Sum check code
calculation range
The C24 calculates the
CPU module checksum.
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
1
0
0
1
1
0
1
1
0
User frame No. 1015 (3F9H)
registration status
User frame No. 1000 (3E8H)
registration status
(H) Buffer memory (L)
Address
to to
b15 b8b7 b0
0: Not registered
1: Registered
to 030FH
Un\G517
to 0303H
Un\G518
to 0000H
Un\G529
User frame No. 1199 (4AFH) registration
status (Subsequent bits are spares)