Mitsubishi Electric MELSEC iQ-R Series User Manual page 81

Condition for alert judgment
Whether the occurrence of an alert is judged or not depends on the following settings:
• 'Setting/operation mode command' (Y1) ( Page 164 Setting/operation mode command)
• "PID continuation Flag" of "Control basic parameters" in "Application Setting" ( Page 136 Application Setting)
• 'CH1 PID control forced stop command' (YC) ( Page 166 PID control forced stop command)
• "Stop mode setting" of "Control basic parameters" in "Application Setting" ( Page 136 Application Setting)
The following table shows the relation between each setting and the execution of alert judgment.
: Executed, : Not executed
'Setting/operation mode
command' (Y1)
Setting mode at power-ON
Operation mode (during
operation)
Setting mode (after operation)
When "Unused channel setting" in "Application Setting" has been set to "Unused," the alert judgment is not executed even
though the above conditions are satisfied.
For the timing of 'Setting/operation mode command' (Y1), refer to the following:
Page 164 Setting/operation mode command
Condition in which 'CH1 Alert flag' (XC) turns OFF
The condition in which 'CH1 Alert flag' (XC) turns OFF differs depending on the following setting.
• "Stop mode setting" of "Control basic parameters" in "Application Setting" ( Page 136 Application Setting)
"Stop mode setting" of "Control basic parameters" in
"Application Setting"
Stop (0)
Monitor (1)
Alert (2)
Setting alert modes and alert set values
The following describes the settings of alert modes and alert set values.
■Alert mode
Set alert modes.
Set "Alert 1 mode setting" to "Alert 4 mode setting" by the following procedure. Up to 4 items can be set.
Alert modes of Alert 1 to 4 correspond to the alert set values 1 to 4.
[Navigation window]  [Parameter]  Target module  [Application Setting]  [Alert setting]
"PID continuation Flag" of 'CH1 PID control forced
"Control basic parameters" stop command' (YC)
in "Application Setting"
Stop (0), Continue (1) OFF, ON
Stop (0), Continue (1) OFF
ON
Stop (0) OFF, ON
Continue (1) OFF
ON
"Stop mode setting" of
"Control basic parameters"
in "Application Setting"
Stop (0)
Monitor (1)
Alert (2)
Stop (0), Monitor (1), Alert (2)
Stop (0)
Monitor (1)
Alert (2)
Stop (0)
Monitor (1)
Alert (2)
Stop (0), Monitor (1), Alert (2)
Stop (0)
Monitor (1)
Alert (2)
'CH1 Alert flag' (XC)
When the cause of the alert is resolved or when the mode has shifted from the
operation mode to the setting mode (when 'Setting/operation mode command'
(Y1) is turned from ON to OFF)
When the cause of the alert is resolved
Alert
judgment














1 FUNCTIONS
79
1.25 Alert Function
1