Function List - Mitsubishi Q68TD-G-H01 User Manual

3
SPECIFICATIONS
3.2

Function List

The following table lists the Q68TD-G-H02 (H01) functions.
Item
Temperature conversion This function allows temperature data to be imported by connecting a thermocouple.
function Temperature data are 16-bit signed binary (-2700 to 18200) and stored into buffer memory.
(1) Sampling processing
(2) Averaging processing
Temperature conversion
system
(3) Primary delay filter
Conversion enable/disable This function specifies whether temperature conversion is enabled or disabled on each
function channel.
Thermocouple type
This function sets the type of thermocouple on each channel.
selection function
Disconnection detection
This function checks the disconnection of the connected thermocouple on each conversion-
function
enabled channel.
(Q68TD-G-H02 only)
Conversion setting for
This function is to select a value to be stored in the CH
disconnection detection
(Un\G11 to Un\G18) from "Up scale", "Down scale" or "Given scale" when disconnection is
function
detected.
(Q68TD-G-H02 only)
Disconnection monitor
This function checks the disconnection of the connected thermocouple on each conversion-
function
enabled channel.
(Q68TD-G-H01 only)
Disconnection state This function is to select a value to be stored in the CH
conversion setting function
(Un\G11 to Un\G18) from "Up scale", "Down scale" or "Given scale" when disconnection is
(Q68TD-G-H01 only)
detected.
This function determines whether to use cold junction temperature compensation.
Use this function to measure temperature in higher accuracy than the cold junction
Cold junction temperature
temperature compensation accuracy ( 1
compensation with/without
compensation resistor (RTD) that is included with the Q68TD-G-H02 (H01).
setting function
The cold junction temperature compensation accuracy can be improved by disabling the
cold junction temperature compensation and providing a precision ice bath externally.
Cold junction temperature
compensation resistor This function detects a disconnection of connected cold junction temperature compensation
disconnection detection resistor (RTD).
function
(1)
Warning output function
(2)
Table 3.3 Function list
A temperature input value is converted one by one on each channel and a measured
temperature value is output after every conversion. Then the value is stored into buffer
memory.
This processing averages a measured temperature value for each channel and the
averaged value is stored into buffer memory.
Averaging processing contains three methods as described below.
(a) Time average
(b) Count average
(c) Moving average
Measured temperature values are smoothed by a preset time constant.
Process alarm
A warning is output when the measured temperature value is equal to or more than the
process alarm upper upper limit value, or equal to or less than the process alarm lower
lower limit value.
Rate alarm
A warning is output when the measured temperature value changes in a rate by which
the measured temperature value reaches the rate alarm upper limit value or more, or
the rate alarm lower limit value or less.
Description
Measured temperature value
Measured temperature value
) by the cold junction temperature
3.2 Function List
1
Refer To 2
Section 3.4.5
3
Section 3.2.1
4
Section 3.4.2
Section 4.5
Section 3.4.15
5
Section 3.2.2
Section 3.4.16
Section 3.2.3
6
Section 4.7
7
Section 3.2.5
8
Section 3.2.4
3
- 5