Mitsubishi Electric MELSEC iQ-R Series User Manual page 97

Alert output signal
Alert output signal (XD) turns on when the process alarm or rate alarm has been detected. When the alert output function is
disabled for all channels, 'Alert output signal' (XD) is always off.
■Process alarm
• Alert output signal (XD) turns on when the measured temperature value exceeds the range set for 'CH1 Process alarm
upper upper limit value' (Un\G514) to 'CH1 Process alarm lower lower limit value' (Un\G520). The ALM LED also turns on
along with the on of the signal. The target of alert output is the channels only where the alert output function (process
alarm) and the temperature conversion are both enabled.
• Alert output signal (XD) turns off when the measured temperature values fall within the setting range for all the temperature
conversion enabled channels. The ALM LED also turns off along with the off of the signal.
■Rate alarm
• Alert output signal (XD) turns on when the change of the measured temperature value exceeds the range set for 'CH1 Rate
alarm upper limit value' (Un\G524) and 'CH1 Rate alarm lower limit value' (Un\G526). The ALM LED also turns on along
with the on of the signal. The target of alert output is the channels only where the alert output function (rate alarm) and the
temperature conversion are both enabled.
• Alert output signal (XD) turns off when the measured temperature values fall within the setting range for all the temperature
conversion enabled channels. The ALM LED also turns off along with the off of the signal.
'Alert output flag (Process alarm upper limit)' (Un\G36)
'Alert output flag (Process alarm lower limit)' (Un\G37)
'Alert output flag (Rate alarm upper limit)' (Un\G38)
'Alert output flag (Rate alarm lower limit)' (Un\G39)
'Alert output signal' (XD)
■Device number
The following shows the device number of this input signal.
Signal name
Alert output signal
Conversion completed flag
Conversion completed flag (XE) turns on when the first temperature conversion has been completed for all conversion
enabled channels. When reading a measured temperature value, use this signal or 'Conversion completed flag' (Un\G42) as
an interlock.
■Device number
The following shows the device number of this input signal.
Signal name
Conversion completed flag
Controlled by the temperature input module
0
ON
CH1 CH2 CH3
XD
CH1 CH2 CH3
XE
Alarm ON (1) 0
OFF
CH4 CH5
CH4 CH5
CH6 CH7 CH8
CH6 CH7 CH8
APPX
Appendix 2 I/O Signals
A
95