Mitsubishi Electric MELSEC iQ-R Series User Manual page 96

Disconnection detection signal
■Turning on Disconnection detection signal (XC)
Disconnection detection signal (XC) turns on when disconnection is detected for the channel where Enable (0) is set in 'CH1
Disconnection detection enable/disable setting' (Un\G530) and the temperature conversion is enabled.
When 'Disconnection detection signal' (XC) turns on, the following operations are performed.
• A value is stored in Measured temperature value of the corresponding channel, according to the settings of 'CH1
Conversion setting at disconnection detection' (Un\G531) and 'CH1 Conversion setting value at disconnection detection'
(Un\G532).
• The ALM LED flashes.
■Turning off Disconnection detection signal (XC)
The operations related to the turning off of Disconnection detection signal (XC) vary depending on the setting of
'Disconnection detection automatic clear enable/disable setting' (Un\G303).
Setting of 'Disconnection
detection automatic clear
enable/disable setting'
(Un\G303)
Enable (0)
Disable (1)
■Device number
The following shows the device number of this input signal.
Signal name
Disconnection detection signal
Averaging processing starts over after the temperature conversion resumes.
APPX
94
Appendix 2 I/O Signals
Operations related to the turning off of Disconnection detection signal (XC)
When the cause of disconnection is eliminated and the connection of external devices is established, 'Disconnection
detection signal' (XC) automatically turns off and the ALM LED turns off.
'Disconnection detection flag'
(Un\G41)
'Disconnection detection
signal' (XC)
'Error clear request' (YF)
Turn on and off 'Error clear request' (YF) when the cause of disconnection is eliminated and the connection of
external devices is established. Accordingly, 'Disconnection detection signal' (XC) turns off and the ALM LED turns
off.
CH1 CH2 CH3
XC
Controlled by the temperature input module
Controlled by the program
0
Disconnection detection
ON
OFF
OFF
CH4 CH5
0
OFF
ON
OFF
CH6 CH7 CH8