D-63
FX Series PLC User's Manual - Data Communication Edition
Computer Link
7 Commands
7.9 QT Command [Tests Device Memory in 1-Word Units (by Writing Arbitrarily)]
A
Common Items
B
N:N Network
C
Parallel Link
D
Computer Link
E
Inverter
Communication
F
Non-Protocol
Communication
(RS/RS2 Instruction)
G
Non-Protocol
Communication
(FX
2N
-232IF)
H
Programming
Communication
I
Remote
Maintenance
Apx.
Discontinued
models
7.9 QT Command [Tests Device Memory in 1-Word Units (by Writing Arbitrarily)]
This section explains the control procedure specification method and shows a specification example when the
word device memory and bit device memory (
in 16-point units
) are specified arbitrarily and written all at once.
Word devices and bit devices (
in 16-point units
) can be specified together. However, the QT command cannot
handle 32-bit word devices C200 to C255 (CN00200 to CN00255).
1. Specification method
The specification method in the control procedure format 1 is shown below:
1) This command is available only in FX
3U and FX3UC PLCs.
2) Specify the device point range while satisfying the following conditions:
-1 ≤ Number of device points ≤ 10 (in unit of 10 in case of bit devices (One unit indicates 16 points.))
3) Express the station number, PLC number, number of device points and sum check code in hexadecimal.
4) Word devices and bit devices (in 16-point units) can be specified together.
5) The QT command cannot handle 32-bit word devices C200 to C255 (CN00200 to CN00255).
2. Specification example
When writing data for setting the current value of R12000 to "1234H" and Y100 to Y117 to "BCA9H" in the
PLC whose station number is 5 (while the message waiting time is set to 0 ms)
E
N
Q
Q T
Character area A
Computer side
PLC side
Device
(7 characters)
A
C
K
Number of
device points
(2 characters)
Data on
devices
(4 characters)
Device
(7 characters)
Data on
devices
(4 characters)
PLC No.
Station
No.
Message
wait time
Sum check
code
PLC No.
Station
No.
Command for test (by writing arbitrarily in 1-word units)
0 2
E
N
Q
0 5 F F Q T 0
This range is regarded as the sum check target.
35
H
30
H
46
H
46
H
57
H
51
H
52
H
32
H
31
H
32
H
05
H
10110110111 00001
BC 9A
Y
1
0
0
Y
1
0
1
Y
1
0
7
Y
1
1
7
Computer side
PLC side
R012000
31
H
34
H
33
H
32
H
1234
59
H
31
H
30
H
Y000100
42
H
39
H
41
H
43
H
BCA9
Y
1
1
0
A
C
K
0 5 F F
E 3
35
H
30
H
46
H
46
H
06
H
33
H
45
H
This range is regarded as the
sum check target.
30
H
30
H
30
H
30
H
30
H
30
H
30
H
30
H
30
H
30
H
To Next Page
Loading...
Need help?
General
