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1
OVERVIEW
2
SYSTEM
CONFIGURATION
3
SPECIFICATIONS
4
SETUP AND
PROCEDURES BEFORE
OPERATION
5
UTILITY PACKAGE (GX
CONFIGURATOR-TI)
6
PROGRAMMING
7
ONLINE MODULE
CHANGE
8
TROUBLESHOOTING
CHAPTER1 OVERVIEW
This user's manual provides the specifications, handling instructions, programming
procedures and other information of the Q68TD-G-H02 or Q68TD-G-H01 channel isolated
thermocouple input module (hereafter abbreviated as Q68TD-G-H02 (H01)), which is
designed to use with the MELSEC-Q series CPU module (referred to as the
programmable controller CPU).
The Q68TD-G-H02(H01) is a module designed to convert thermocouple input values from
outside the programmable controller into 16-bit signed binary measured temperature
values and 16-bit signed binary scaling values (ratios).
Figure 1.1 Overview of Q68TD-G-H02(H01)
* 1 Refer to Section 3.4.17 for details of the scaling values.
Q68TD-G-H02(H01)
Programmable
controller CPU
FROM
instruction
TO
instruction
Initial setting
Measured
temperature value,
scaling value
reading
(Buffer memory)
Resistance temperature
detector input
(by cold junction temperature
compensation resistor (RTD))
Thermocouple input
Thermocouple input
Set data
Measured
temperature value
Scaling value
Scaling value
Measured
temperature value
Cold junction
temperature
compensation
channel
Channel 1
Channel 8
Temperature measurement
*
1
*
1