Features - Mitsubishi Melsec-Q Series User Manual

1
OVERVIEW
1.1

Features

(1) Channels isolated
(2) 8 channels of temperatures measured by one module
(3) Setting of conversion enable/disable
(4) Thermocouples conforming to JIS or IEC Standards usable
(5) Disconnection detection function (Q68TD-G-H02 only)
(6) Disconnection monitor function (Q68TD-G-H01 only)
(7) Selection of sampling processing, time average processing, count
(8) Cold junction temperature compensation by cold junction temperature
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- 2 1.1 Features
Q68TD-G-H02(H01) is channel isolated modules.
One Q68TD-G-H02(H01) module can measure temperatures of 8 channels.
It can also convert the detected temperature values into scaling values (ratios (%)).
Conversion enable/disable setting for each channel is possible. Disabling conversion
for unused channels prevents unnecessary disconnection detection or monitor of
disconnection state on unused channels.
You can use eight different thermocouples (K, E, J, T, B, R, S, N) conforming to the
JIS or IEC Standards.
The types of thermocouples can be selected for each channel.
Disconnection status of thermocouple or compensating lead wire can be detected for
each channel by Disconnection detection flag.
Disconnection status can also be detected from the measured temperature value by
setting "Up scale", "Down scale" or "Given value" for the Conversion setting for
disconnection detection.
Disconnection status of thermocouple or compensating lead wire can be checked on
each channel by Disconnection state monitor flag.
Disconnection status can also be checked from the measured temperature value by
setting "Up scale", "Down scale" or "Given value" for the Conversion setting for
disconnection detection.
average processing, moving average processing, and primary delay
filter
As a conversion processing method, sampling processing, time average processing,
count average processing, moving average or primary delay filter can be selected for
each channel.
compensation resistor (RTD)
Cold junction temperature compensation is possible by connecting the supplied cold
junction temperature compensation resistor (RTD) and enabling the cold junction
temperature compensation.
Resistance temperature detector Pt100 is used for cold junction temperature
compensation resistor (RTD).