Mitsubishi q64rd, User Manual

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MELSEC-Q
1 OVERVIEW
1 OVERVIEW
This user's manual provides the specifications, handling instructions, programming
procedures and other information of the Q64RD platinum RTD (Resistance
Temperature Detector) input module and the Q64RD-G channel isolated RTD input
module (hereinafter referred to as the Q64RD and Q64RD-G), which are designed to
use together with the MELSEC-Q series CPU module (hereinafter referred to as the
CPU).
The Q64RD is a module for connection of 3-wire or 4-wire type platinum RTDs (2-wire
application is available if terminals are short-circuited.) and converts temperature data
[ ] input from Pt100 or JPt100 platinum RTD (hereinafter referred to as PT100 or
JPt100) to:
• 16-bit signed binary data (stored as a value rounded off to 1 decimal place 10)
• 32-bit signed binary data (stored as a value rounded off to 3 decimal places 1000)
and scaling values (ratios (%)).
The Q64RD-G is a module for connection of 3-wire or 4-wire type RTDs (2-wire
application is available if terminals are short-circuited.) and converts temperature data
[ ] input from Pt100, JPt100 or nickel RTD Ni100 (hereinafter referred to as
Ni100 ) to:
• 16-bit signed binary data (stored as a value rounded off to 1 decimal place 10)
• 32-bit signed binary data (stored as a value rounded off to 3 decimal places 1000)
and scaling values (ratios (%)).
Q64RD/Q64RD-G
Programmable controller
CPU
FROM
instruction
TO
instruction
Initial setting
(Buffer memory)
RTD
Set data
Scaling value
Scaling value
Channel 4
Channel 1
*
Measured
temperature
value
*
T
em
pera
ture m
easurem
en
t
RTD
*: Refer to Section 3.4.15 for details of the scaling values.
Measured
temperature
value, scaling
value reading
Measured
temperature
value
1