Mitsubishi MELSEC-F FX3U Series User Manual

E-8
2 Specifications
2.4 A/D Conversion Time
FX 3U /FX 3UC Series PLC User's Manual - Analog Control Edition
FX 3U -4AD-PT-ADP (4-channel Platinum Resistance Thermometer Data Input)
2.4 A/D Conversion Time
This section describes the A/D conversion time.
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 stoppage of PLC
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 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 4 channels will be read out in 200µs, and the
data read out will be written in the special data registers.
END instruction execution time will be "200µs × number of connected adapters."
2.5 Temperature Measurement
To stabilize the temperature measurement, warm-up the system for 30 minutes or more after power-on.
FX 3U /FX 3UC Series PLC
FX 3U -4AD-PT-ADP
1st
FX 3U -4AD-PT-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 MELSEC-F FX3U Series Specifications

General

Brand	Mitsubishi
Model	MELSEC-F FX3U Series
Category	Controller
Language	English