Stop Alarm Processing In Loop Control - Mitsubishi Electric MELSEC iQ-R Series Programming Manual

Stop alarm processing in loop control

Stop alarm (SPA) overview
When an error related to the loop tag data such as a sensor error (SEA) occurs, the control mode can be changed to
MANUAL forcibly by switching the stop alarm (SPA) from FALSE to TRUE.
Switch the stop alarm (SPA) from FALSE to TRUE using a user program as necessary.
When the stop alarm (SPA) is switched to TRUE, alarms which have occurred (MLA, MHA, DVLA, DPPA, PLA, PHA, LLA,
HHA, SEA, and DMLA) will be automatically reset (TRUE  FALSE).
Alarm (ALM) items of loop tag data
The following table lists alarm (ALM) items of loop tag data.
Offset Label
+3 b0 MLA
b1 MHA
b2 DVLA
b3 DPNA
b4 DPPA
b5 PLA
b6 PHA
b7 LLA
b8 HHA
b9 SEA
bA OOA
bB DMLA
bE SPA
For the detailed tag data list, refer to the following.
Page 490 Tag Data List
An alarm (ALM) consists of multiple Boolean variables. Boolean variables constituting an alarm (ALM) become global
variables.
APPX
612
Appendix 3 Related Functions of Process
Application
Output Low Limit Alarm
Output High Limit Alarm
Large Deviation Alarm
Negative Variation Rate Alarm
Positive Variation Rate Alarm
Input Low Limit Alarm
Input High Limit Alarm
Input Low Low Limit Alarm
Input High High Limit Alarm
Sensor Error Alarm
Output Open Alarm
Output Variation Rate Limit Alarm
Stop Alarm