Mitsubishi Electric MELSEC FX3U Programming Manual page 475

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
2. 32-bit operation (DTO and DTOP)
PLC (word device) → Special extension unit/block (BFM)
"n"-point 32-bit data starting from [
memories starting from the buffer memory (BFM) # [m2+1, m2] inside a special extension unit/block No. m1.
Command
input
FNC 79
DTO
Related devices
Device
M8028 Enable interrupt flag
Cautions
• Digit specification in bit device
For the 16-bit operation instruction, specify K1 to K4. For the 32-bit operation instruction, specify K1 to K8.
• Note that the 32-bit values [m1+1, 1], [m2+1, m2] and [n+1, n] are valid when D or R is specified as "m1",
"m2" or "n" in a 32-bit instruction.
In the case of "DTO D0 D2 D100 R0", "m1" is [D1, D0], "m2" is [D3, D2], and "n" is [R1, R0].
Program examples
In programs, the contents of data registers (D), extension registers (R), auxiliary relays (M) with digit
specification and constants (K and H) are written (transferred) to buffer memories (BFMs) in special extension
units/blocks using the TO instruction and direct specification of buffer memories
*1. This function is supported only in FX
Example: When writing "H0" to the BFM #27 (command) in the CC-Link/LT master unit (whose unit number is
fixed to "0") built in the FX
- In case of TO instruction
M1
- In case of MOV instruction
M1
,
S S
m1 m2 S
Name
Disables or enables interrupts while FROM/TO instruction is executed.
→ For details, refer to "Acceptance of interrupt while FROM/TO instruction is
OFF: Disables interrupts.
(Interrupts are executed after FROM/TO instruction is executed.)
ON: Enables interrupts.
S
/FX
3U
-32MT-LT(-2)
3UC
FNC 79
K0 K27
TOP
Unit BFM #27
No. 0
FNC 12
H0 U0\G27
MOVP
Transfer Unit No. 0
source BFM #27
data
15 External FX I/O Device – FNC 70 to FNC 79
15.10 FNC 79 – TO / Write To A Special Function Block
+1] inside a PLC are transferred (written) to "n"-point buffer
n
Number of transfer points
n = 1 to 16383
Transfer source (PLC)
Transfer destination (Special
extension unit/block) BFM #
m2 = 0 to 32765
Unit No.
m1 = 0 to 7
Description
executed (M8028)" in Subsection 15.9.1.
PLCs.
3UC
H0 K1
Transfer Number of
source Transfer
data points
*1
.
473
11
12
13
14
15
16
17
18
19
20