Mitsubishi Electric MELSEC iQ-R Series User Manual page 291

CH1 Alert 4 mode setting
Set the alert mode of Alert 4. For details on the alert function, refer to the following:
Page 72 Alert Function
■Buffer memory address
The following shows the buffer memory address of this area.
Buffer memory area name
CH Alert 4 mode setting
CH Alert 4 mode setting (in the Q compatible mode)
This area is disabled for the following modes and channels:
• Heating-cooling control (normal mode), position-proportional control (normal mode): CH3, CH4
• Mix control (normal mode): CH2
■Alert mode and alert set value
Set an alert set value for the alert mode of Alert 4 selected in this setting. Set a value in 'CH1 Alert set value 4' (Un\G437).
'CH1 Alert set value 4' (Un\G437) corresponds to the alert mode of Alert 4.
■Setting range
For the setting range, refer to the following in CH1 Alert 1 mode setting:
Page 286 Setting range
■Enabling the settings
For enabling the settings, refer to the following in CH1 Alert 1 mode setting:
Page 286 Enabling the settings
■Default value
For the default value, refer to the following in CH1 Alert 1 mode setting:
Page 286 Default value
CH1 Loop disconnection detection judgment time
The loop disconnection detection function detects errors such as disconnections of resistors, malfunction of an
externallyoperable device, and errors of the control system due to troubles such as disconnection of a sensor. When the
temperature does not change by 2 () or higher within the loop disconnection detection judgment time, this function judges
it as a loop disconnection. For details on the loop disconnection detection function, refer to the following:
Page 91 Loop Disconnection Detection Function
■Buffer memory address
The following shows the buffer memory address of this area.
Buffer memory area name
CH Loop disconnection detection judgment time
CH Loop disconnection detection judgment time (in the Q compatible mode)
■Setting range
The setting range is 0 to 7200 (s).
Set a value greater than the time taken for the temperature to change by 2 ().
■When executing the auto tuning
A value that is twice as large as the value in 'CH1 Integral time (I) setting' (Un\G432) is automatically set in this setting.
However, when this setting has been set to 0 (s) at the start of the auto tuning, the loop disconnection detection judgment time
is not stored.
■Default value
The default value is 480 (s).
CH1 CH2
536 736
195 211
CH1 CH2
537 737
59 91
Appendix 3 Buffer Memory Areas
CH3 CH4
936 1136
227 243
CH3 CH4
937 1137
123 155
APPX
289
A