Mitsubishi FX3U-4AD User Manual

C-8
2 Specifications
2.4 A/D Conversion Time
FX 3G /FX 3U /FX 3UC PLC User's Manual - Analog Control Edition
FX3U-4AD-ADP (4-channel analog Input)
2.4 A/D Conversion Time
This section describes the A/D conversion time.
2.4.1 When connected to a FX3U, FX3UC 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. If two or more analog special adapters are connected
During execution of the END instruction, data will be read out from all the connected adapters (in the order of
1st adapter → 2nd adapter... 4th adapter).
4. A/D conversion speed (data update time)
During execution of END instruction, the A/D converted data of all 4 channels will be read out in 200µs, and
the data read out will be written to the special data registers.
END instruction execution time will be "200µs × number of connected analog adapters."
FX 3U /FX 3UC Series PLC
FX 3U -4AD-ADP
1st
FX 3U -4AD-ADP
n'th
A/D
conversion
200
µ s/4ch
A/D
conversion
200 µ s/4ch
Digital value writing
A/D conversion start
command
END instruction
Sequence
program
Digital value writing
A/D conversion start
command

Mitsubishi FX3U-4AD Specifications

General

Brand	Mitsubishi
Model	FX3U-4AD
Category	Controller
Language	English