From And To Instructions - Mitsubishi FX3U-USB-BD User Manual

FX Series PLC User's Manual - Data Communication Edition
Non-Protocol Communication (FX
5.2

FROM and TO Instructions

This section explains how to use FROM and TO instructions.
5.2.1 FROM instruction
FROM instruction reads data of the buffer memory in a special block.
1. Applicable devices
• For FX /FX
2N 2NC
Operand
Type
X Y
m1
m2
D
n
• For FX /FX
3U 3UC
Bit Devices
Oper-
and System User
Type
X Y M T C S D .b KnX KnY KnM KnS T C D R U \G
m1
m2
D
n
2. Function and operation
1) 16-bit operation (FROM and FROMP)
Special function block (BFM)
"n" 16-bit data starting from buffer memory (BFM) No. m2 inside the special function block No. m1 are
transferred (read) to "n" devices starting from
Command
FNC 78
2) 32-bit operation (DFROM and DFROMP)
Special function block (BFM)
"n" 32-bit data starting from buffer memory (BFM) No. m2 inside the special function block No. m1 are
transferred (read) to "n" devices starting from [
Command
FNC 78
DFROM
-232IF)
2N
PLCs
Bit Devices
System User Digit Specification
M T C S KnX KnY
PLCs
Digit Specification
→
PLC (word device)
m1 m2
FROM
→ PLC (word device)
m1 m2
Word Devices
System User
KnM KnS T C D
Word Devices
Special
System User
Unit
V Z Modify K H
inside the PLC.
D
D n
Number of transfer points
n = 1 to 32767
Transfer destination (PLC)
Transfer source BFM #
(Special extension unit/block)
m2 = 0 to 32766
Unit No.
m1 = 0 to 7
+1, ] inside the PLC.
D D
D n
Number of transfer points
n = 1 to 16383
Transfer destination (PLC)
Transfer source BFM #
(Special extension unit/block)
m2 = 0 to 32765
Unit No.
m1 = 0 to 7
5 Creating Programs
5.2 FROM and TO Instructions
Others
Index Constant
V Z Modify K H
Others
Con- Real Charac-
Index
stant Number ter String
E " "
A
B
C
Pointer
P
D
Pointer
E
P
F
G
H
I
Apx.
G-15