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

Block 16-bit data exchanges

BXCH(P)
High
Basic
Process
performance
BXCH
BXCHP
(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 Internal device
data
Bit

(D1)

(D2)

n
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).
b15
0 0 0 0 1 1
D1
1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0
D1 +1
0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1
D1 +2
D1 +(n 2) 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
D1 +(n 1) 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
b15
0 0 1 1 0 0
D1
+1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1
D1
+2 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0
D1
D1 +(n 2) 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
D1 +(n 1) 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1
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.
Error Error details
code
4101 The points specified in n exceed those of the corresponding device specified
in (D1) or (D2).
The (D1) and (D2) devices overlap.
6 BASIC INSTRUCTIONS
316
6.4 Data Transfer Instructions
Redundant Universal LCPU
Command
Command
R, ZR
Word



b8 b7 b0
1 1 0 0 0 0 1 1 1 1
n
b8 b7 b0
1 1 0 0 1 1 0 0 1 1
n
BXCH
BXCHP
J\
Bit Word



b15 b8 b7
D2
0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1
D2
+1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1
D2 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0
+2
D2 +(n 2) 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
D2 +(n 1) 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1
b15 b8 b7
D2
0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1
D2 +1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0
D2 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1
+2
D2
+(n 2) 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
D2
+(n 1) 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
Q00J/
Q00/
Q01

n
D1 D2
n
D1 D2
U\G Zn Constant
K, H
b0
n
b0
n
QnH QnPH QnPRH
  
Others



QnU LCPU
 