Yokogawa PC-Based MX100 - Manual (Page 5)

IM MX190-02E
Data Acquisition Function (FIFO)
MX100 Data Acquisition Function (FIFO)
Measurement Interval and FIFO
With the MX100, you can set up to three measurement intervals per module. Buffers are
set up in the MX100 to store acquired data for each measurement interval. These buffers
operate on a FIFO (first in first out) basis. FIFO means that data is written to the buffer
from top to bottom, and when full, new data overwrites old data starting from the top.
Each FIFO buffer is assigned the number 0, 1, or 2 in the order of shortest measurement
interval.
Measured data from channels on moduels set to the same measurement intervals are
stored in the FIFO buffer of the same number. Thus, if you specify a FIFO number to
retrieve data from the MX100, you can retrieve measured data from all channels having
the same measurement interval.
MX100
Meas.
interval
10 ms
Meas.
interval
100 ms
FIFO no. 1
100 ms
Channels
1–10
21–30
41–50
FIFO no. 2
1 s
Channels
31–40
51–60
FIFO no. 0
10 ms
Channels
11–20
Meas.
interval
1 s
Meas.
interval
100 ms
Meas.
interval
1 s
Meas.
interval
100 ms
Channels not set up for measurement are not included.
MX100
The table below shows the measurement intervals that can be set on modules.
Module Model Selectable Measurement Intervals
10 0 100 200 00 1 2 10 20 0 60
ms s
4-CH, High-Speed Universal Input
Module
MX110-UNV-H04 Y Y Y Y Y Y Y Y Y Y Y Y
10-CH, Medium-Speed Universal
Input Module
MX110-UNV-M10 N N Y Y Y Y Y Y Y Y Y Y
30-CH Medium Speed DCV/TC/DI
Input Module
MX110-VTD-L30 N N N N Y Y Y Y Y Y Y Y
6-CH, Medium-Speed Four-Wire RTD
Resistance Input Module
MX110-V4R-M06 N N Y Y Y Y Y Y Y Y Y Y
4-CH, Medium-Speed Strain Input
Module
MX112-B12-M04
MX112-B35-M04
MX112-NDI-M04 N N Y Y Y Y Y Y Y Y Y Y
10-CH, High-Speed Digital Input
Module
MX115-D05-H10
MX115-D24-H10 Y Y Y Y Y Y Y Y Y Y Y Y
10-CH Pulse Input Module MX114-PLS-M10 N N Y Y Y Y Y Y Y Y Y Y
Y: selectable, N: not selectable