Overview - Mitsubishi Q64RD User Manual

1 OVERVIEW

1 OVERVIEW
This user's manual provides the specifications, handling, programming procedures and
others of the Q64RD platinum temperature-measuring resistor temperature input
module (abbreviated to the Q64RD) used with the MELSEC-Q series CPU module
(hereafter abbreviated to the PLC CPU).
The Q64RD is a module for connection of four-conductor type platinum temperature-
measuring resistors (two- or three-conductor type resistors can also be connected by
shorting the terminals), and designed to convert temperature data [ ] input from Pt100
or JPt100 platinum temperature-measuring resistors (hereafter abbreviated to the
Pt100 or JPt100) into temperature measurement values and scaling values (ratios (%))
of the following:
• 16-bit signed binary data (stored as a value to the first decimal place
• 32-bit signed binary data (stored as a value to the third decimal place
PLC CPU
TO
instruction
FROM
instruction
*: Refer to Section 3.5.12 for details of the scaling values.
1 - 1
(Buffer memory)
Initial setting
Set data
Temperature
measurement
value
Temperature
Scaling value
measurement
value, scaling
value reading
Temperature
measurement
value
Scaling value
Q64RD
Channel 1
*
*
Channel 4
MELSEC-Q
1
10)
1000)
Platinum temperature-
measuring resistor
Platinum temperature-
measuring resistor
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