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7 Examples of Practical Programs
7.1 Program That Uses Averaging Time
A
Common Items
B
FX
3U
-4AD
FX
3UC
-4AD
C
FX
3U
-4AD-ADP
D
FX
3G
-2AD-BD
E
FX
3U
-4DA
F
FX
3U
-4DA-ADP
G
FX
3G
-1DA-BD
H
FX
3U
-3A-ADP
I
FX
3U
-4AD-PT
-ADP
J
FX
3U
-4AD-PTW
-ADP
FX
3G
/FX
3U
/FX
3UC
PLC User's Manual - Analog Control Edition
FX3U-4AD/FX3UC-4AD (4-channel Analog Input)
7. Examples of Practical Programs
Use the functions incorporated in the 4AD to create practical programs. This chapter describes the examples
of practical programs.
• Program that uses the averaging time
• Program that uses convenient functions
• Program that uses the data history function
• Program that initializes 4AD (to the factory default status)
7.1 Program That Uses Averaging Time
This section describes a program that uses the analog data averaging time input to the 4AD or the digital filter
function of the 4AD.
1. Conditions
The sequence program described in this section is created under the following conditions.
1) System configuration
The FX
3U-4AD (unit No.0) should be connected to the FX3U Series PLC.
2) Input mode
Channels 1 and 2 should be set to mode 0 (voltage input, -10V to +10V → -32000 to +32000).
Channels 3 and 4 should be set to mode 3 (current input, 4mA to 20mA → 0 to 16000).
3) Averaging time
For channels 1 to 4, the averaging time should be set to "10".
4) Digital filter function
For channels 1 to 4, the digital filter function should be disabled (default).
5) Device assignment
2. Example of sequence program
•For FX3U, FX3UC Series PLCs
*1. After setting the input mode, set the data writing time (waiting time) to 5 seconds or more for each
setting.
The specified input mode will be retained even if power failure occurs. After specifying the input mode,
if the same input mode is used, it is not necessary to set the input mode and waiting time (T0 K50).
*2. To use the default value set for the digital filter function, it is not necessary to set the digital filter
function in the sequence program.
Device Description
D0 A/D converted digital value for channel 1
D1 A/D converted digital value for channel 2
D2 A/D converted digital value for channel 3
D3 A/D converted digital value for channel 4
M8002
FNC 12
MOV
H3300 U0\G0
P
M8000
K50
T0
*1
T0
FNC 16
FMOV
K10 U0\G2 K4
P
Input modes of channels 1
to 4 will be specified.
For channels 1 and 2, the averaging time
will be set to "10".
Initial pulse
FNC 16
FMOV
K0 U0\G6 K4
P
The digital filter function of channels 1
and 2 will be disabled.
FNC 15
BMOV
U0\G10 D0 K4
RUN monitor
*2
The digital values set for channels
1 to 4 will be read out to D0 to D3.
*1