paraffin power
Member
Hi
Seen this problem for a while.
Using the alarm function on, say, a PanelView or a Siemens TP.
When an alarm occurs it's displayed with its own ACKnowledge button. All is well. ACKnowledging the alarm removes that alarm latch ONLY.
If the alarm condition comes back momentarilty after ACKnowledging, the PLC latches the alarm again, but the HMI never saw the alarm disappear/re-appear and therefore doesn't class the alarm as a new instance, and doesn't give me the ACK button again. Result is alarm is latched in plc with no 'proper' way of removing.
I can use an ACK ALL button, but I do like to ensure every alarm is individually ACKed, so I can prevent process starting until Mr. Operator has seen every alarm.
The 'press reset, press start' cycle isn't acceptable.
Does anyone have any ideas?
Thank you
Seen this problem for a while.
Using the alarm function on, say, a PanelView or a Siemens TP.
When an alarm occurs it's displayed with its own ACKnowledge button. All is well. ACKnowledging the alarm removes that alarm latch ONLY.
If the alarm condition comes back momentarilty after ACKnowledging, the PLC latches the alarm again, but the HMI never saw the alarm disappear/re-appear and therefore doesn't class the alarm as a new instance, and doesn't give me the ACK button again. Result is alarm is latched in plc with no 'proper' way of removing.
I can use an ACK ALL button, but I do like to ensure every alarm is individually ACKed, so I can prevent process starting until Mr. Operator has seen every alarm.
The 'press reset, press start' cycle isn't acceptable.
Does anyone have any ideas?
Thank you