brendan.buchan
Member
This is a different problem but on the same machine as my other post.
Basically there is an alarm message showing up on the TP270 HMI, and I am trying to find the bit that is triggering it in the S7-300 PLC program but I can't find it.
The alarm message coming up is listed as alarm message 10 "IGS01 CALIBRATION LOST ERROR".
If you go to Area Pointers setup in ProTool you can see that the Alarm Messages pointer is set to DB6.DBW0.
With this information you would assume that alarm message 1 = STAT0 = DB6.DBX0.0, therefore alarm message 10 = STAT9 = DB6.DBX1.1, however this is not the case.
When the alarm is active, DB6.DBX1.1 is false.
So then I tested another alarm, alarm message 49 "MELT PUMP OIL COOLER/HEATER NOT RUNNING".
You would think that alarm message 49 = STAT48 = DB6.DBX6.0, but when I was triggering the alarm condition on and off I could see that it was in fact STAT56 or DB6.DBX7.0 triggering the alarm message.
I have attached DB6 and some screenshots of the alarm message setup in ProTool.
Can anyone explain this behaviour?
Basically there is an alarm message showing up on the TP270 HMI, and I am trying to find the bit that is triggering it in the S7-300 PLC program but I can't find it.
The alarm message coming up is listed as alarm message 10 "IGS01 CALIBRATION LOST ERROR".
If you go to Area Pointers setup in ProTool you can see that the Alarm Messages pointer is set to DB6.DBW0.
With this information you would assume that alarm message 1 = STAT0 = DB6.DBX0.0, therefore alarm message 10 = STAT9 = DB6.DBX1.1, however this is not the case.
When the alarm is active, DB6.DBX1.1 is false.
So then I tested another alarm, alarm message 49 "MELT PUMP OIL COOLER/HEATER NOT RUNNING".
You would think that alarm message 49 = STAT48 = DB6.DBX6.0, but when I was triggering the alarm condition on and off I could see that it was in fact STAT56 or DB6.DBX7.0 triggering the alarm message.
I have attached DB6 and some screenshots of the alarm message setup in ProTool.
Can anyone explain this behaviour?