Mitsubishi Electric MELSEC-Q/L - Block 16-Bit Data Exchanges

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6 BASIC INSTRUCTIONS
6.4 Data Transfer Instructions
Block 16-bit data exchanges
BXCH(P)
Processing details
• Exchanges 16-bit data of n points from device designated by (D1) and 16-bit data of n points from device designated by
(D2).
Operation error
• In any of the following cases, an operation error occurs, the error flag (SM0) turns ON, and an error code is stored into SD0.
(D1), (D2) : Head number of the devices where the data to be exchanged is stored (BIN 16 bits)
n: Number of exchanges (BIN 16 bits)
Setting
data
Internal device R, ZR J\ U\G Zn Constant
K, H
Others
Bit Word Bit Word
(D1)   
(D2)   
n   
Error
code
Error details Q00J/
Q00/
Q01
QnH QnPH QnPRH QnU LCPU
4101 The points specified in n exceed those of the corresponding device specified
in (D1) or (D2).
The (D1) and (D2) devices overlap.

Basic
Process
High
performance
Redundant Universal LCPU
Command
Command
BXCHP
BXCH
n
n
BXCHP
BXCH
D1 D2
D1 D2
1 1 1 1 1 1 1 1
0 0 0 000 0 0
0 0 0 0 0 0 0 0
1 1 1 111 1 1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
n
0000111111110000
+1
+(n 1)
+2
+(n 2)
1 1 0 0 0 0 1 1 1 1 0 000 1 1
1 1 1 1 1 1 1 1 0 0 0 000 0 0
1 1 1 1 1 1 1 1 1 1 1 111 1 1
0 0 0 0 0 0 0 0
1 1 1 111 1 1
b7 b0b15 b8
0011001111001100
1 1 1 1 1 1 1 1
0 0 0 000 0 0
0 0 0 0 0 0 0 0
1 1 1 111 1 1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0000111111110000
1 1 0 0 0 0 1 1 1 1 0 000 1 1
1 1 1 1 1 1 1 1 0 0 0 000 0 0
1 1 1 1 1 1 1 1 1 1 1 111 1 1
0 0 0 0 0 0 0 0
1 1 1 111 1 1
0011001111001100
D1
D2
D1
D1
D1
D1
+1
+(n 1)
+2
+(n 2)
D1
D1
D1
D1
D1
+1
+(n 1)
+2
+(n 2)
D2
D2
D2
D2
b7 b0b15 b8
n
b7 b0b15 b8b7 b0b15 b8
D2
+1
+(n 1)
+2
+(n 2)
D2
D2
D2
D2
nn