J-9
2 Specifications
2.4 A/D Conversion Time
FX
3S
/FX
3G
/FX
3GC
/FX
3U
/FX
3UC
PLC User's Manual - Analog Control Edition
FX
3U
-4AD-PTW-ADP (4-channel Platinum Resistance Thermometer Data Input)
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
2.4 A/D Conversion Time
This section describes the A/D conversion time.
2.4.1 When connected to a FX3S PLC
1. A/D conversion and special data register update timing
A/D conversion is performed at every scan time of the PLC.
During execution of END instruction, the PLC performs A/D conversion, reads out the A/D converted data,
and then writes the data in the special data registers.
2. A/D conversion during PLC stop
Even if the PLC is stopped, A/D conversion will be performed and the special data registers will be updated.
3. A/D conversion speed (data update time)
During execution of the END instruction, the A/D converted data of all 4 channels will be read out in 250 μs,
and the data read out will be written to the special data registers.
END instruction execution time will be 250 μs
FX
3S
Series PLCFX
3U
-4AD-PTW-ADP
A/D
conversion
250 s/4ch
Digital value reading
A/D conversion start
command
END instruction
Sequence
program
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