426
FROM, FROMP, DFRO, DFROP
7.8
Buffer memory access instruction
n1
: Head I/O number of an intelligent function module (BIN 16 bits)
*1
n2
: Head address of the buffer memory where data to be read is stored (BIN 16 bits)
: Head number of the devices where the read data will be stored (BIN 16/32 bits)
n3
: Number of data blocks to be read (BIN 16 bits)
*1:
Specified with the upper three digits when the head I/O number is expressed in 4 hexadecimal digits.
Function
FROM
(1) Reads the data in n3 words from the buffer memory address designated by n2 of the intelligent function module
designated by n1, and stores the data into the area starting from the device designated by .
DFRO
(1) Reads the data in (n3 2) words from the buffer memory address designated by n2 of the the intelligent function module
designated by n1, and stores the data into the area starting from the device designated by .
Data read from intelligent function modules is also possible with the use of an intelligent function module device.
For the intelligent function module device, refer to the QnUCPU User's Manual (Function Explanation, Program
Fundamentals) or Qn(H)/QnPH/QnPRHCPU User's Manual (Function Explanation, Program Fundamentals).
FROM, FROMP
Reading 1-word data from the intelligent function module
DFRO, DFROP
Reading 2-word data from the intelligent function module
7.8.1
FROM, FROMP, DFRO, DFROP
Setting
Data
Internal Devices
R, ZR
J \
U \G
Zn
Constants
K, H
Other
U
Bit
Word
Bit
Word
n1
n2
––
––
––
n3
––
Basic
Process
High
performance
Redundant Universal
LCPU
Command
Command
n3
n3
P
n1
n1
n2
n2
D
D
FROM, DFRO
FROMP, DFROP
indicates an instruction s
y
mbol of FROM/DFRO.
D
D
D
CP
U
module
n3 words
n3 points
n2
Device designated
b
y
D
Intelligent function module
buffer memor
y
D
D
CP
U
module
(
n3 2
)
words
n2
n2+1
Device designated
b
y
(
n3 2
)
points
Intelligent function module
buffer memor
y