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3.2 Function List
3.2.2 Conversion setting for disconnection detection function (Q68TD-G-H02 only)
3
SPECIFICATIONS
3.2.2 Conversion setting for disconnection detection function
(Q68TD-G-H02 only)
The conversion setting for disconnection detection function stores specific values into
measured temperature values when disconnection is detected.
This function can identify the disconnection detection from measured temperature values.
This function is only available for channels enable temperature conversion.
(1) Overview of disconnection detection
Figure 3.6 Overview of disconnection detection
(a) It takes up to 640ms till when disconnection is detected.
When disconnection is detected, Disconnection detection flag (Un\G49) and
Disconnection detection signal (XC) turn on. Consequently, “ALM” LED blinks.
(b) When disconnection is detected, the value selected from “Up scale”, “Down scale”
or “Given value” in Conversion setting for disconnection detection
(Un\G164,Un\G165) is stored into CH Measured temperature value (Un\G11 to
Un\G18).
The values specified in Conversion setting for disconnection detection
(Un\G164,Un\G165) remains from when disconnection state is restored till when
normal measured temperature value is stored.
(c) After disconnection state is restored, the batch-update of measured temperature
value restarts automatically.
It takes up to 1600ms from when disconnection state is restored till when
measured temperature value is stored into CH Measured temperature value
(Un\G11 to Un\G18).
(d) The state of Disconnection detection flag (Un\G49), Disconnection detection
signal (XC), and “ALM” LED, which means the state of disconnection detection,
remain even when disconnection state is restored. Turn on Error clear request
(YF).
(e) For operating the warning output function in disconnection and restoration, refer
to Section 3.2.4.
Disconnection detection signal (XC)
Normal
Normal(0)
Normal
Normal(0)
Measured
temperature
value
Measured
temperature
value
Maximum 1600msMaximum 640ms
Conversion setting value
for disconnection detection
Disconnected(1)
Disconnected
Disconnection detection flag (Un\G49)
Error clear request (YF)
CH Measured temperature value
(Un\G11 to Un\G18)