Mitsubishi Q64RD User Manual page 21

3 SPECIFICATIONS
Device No. Signal Name
Disconnection
XC
Detection Flag
Warning Output
XD
Signal
A/D Conversion
XE
Completed Signal
Error Occurred
XF
Signal
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(1) This signal (XC) is turned on by the thermocouple input circuit of the channel enabled for
conversion when any of the input signal lines including the thermocouple is disconnected.
(2) When this signal (XC) has turned on, the temperature conversion value is held at the value
immediately before disconnection detection, and the A/D Conversion Completed Signal (XE) is
turned off.
(3) Remove the cause of disconnection and then turn on the Error Clear Request (YF) to turn off
this signal (XC).
(4) When disconnection is recovered, updating of the temperature conversion value is resumed
regardless of whether this signal (XC) was reset or not, and after the first updating, the A/D
Conversion Completed Signal (XE) turns on again.
(1) This signal turns on when the measured temperature value has fallen out of the temperature
range set in the warning output upper/lower limit values (buffer memory addresses 85 to 100:
Un\G85 to 100) on any of the channels enabled for conversion.
(2) This signal turns off automatically as soon as the measured temperature values returned to
within the ranges on all channels enabled for conversion.
(1) This signal (XE) turns on when the temperature conversion values of all channels enabled for
conversion are stored into buffer memory after power-on or hardware reset.
(2) When averaging processing is performed, this signal also turns on when the temperature
conversion values are stored into buffer memory after completion of averaging processing.
(3) This signal (XE) varies as described below depending on whether the Operation Condition
Setting Completed Signal (X9) has turned on or off.
• When the Operation Condition Setting Completed Signal (X9) has turned on
(stop conversion)
1) Temperature conversions of the enabled channels are started.
2) After the temperature conversion values are stored into buffer memory, the A/D
conversion completed flags (buffer memory address 10: Un\G10) are turned on.
3) This signal (XE) is turned on after the temperature conversion values of all channels
enabled for conversion are stored into buffer memory.
• When the Operation Condition Setting Completed Signal (X9) has turned off
(conversion stop)
1) The R/D conversion completed flags (buffer memory address 10: Un\G10) of all channels
are turned off.
2) This signal (XE) is turned off.
Note that if conversion is stopped, the temperature conversion values stored in buffer
memory are held at the data immediately before the stop.
(4) This signal (XE) does not turn on when all channels are disabled for conversion.
(1) This signal (XF) turns on when an error occurs.
(2) To clear the error code, turn on the Error Clear Request (YF).
Error Occurred Signal (XF)
Error Clear Request (YF)
Description
Error code is read during this period.
MELSEC-Q
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