Commissioning Example - Monitoring Of Pressure Drop - Festo MSE6-E2M Original Instructions Manual

B Parameterisation examples
B.2 Commissioning example – monitoring of pressure drop
Each system must be set individually. The sample values are only intended as an orienta­
tion.
Recommended procedure for determining the value for the parameter "Upper limit pressure change":
1. MSE6-E2M Switch to the "Pressurisation" status.
2. Set value for the parameter "Pressure change sample time".
If the system shows a high pressure drop, start with a setting of 100 ms (corresponds to
parameter value 1). This displays the value for the pressure change every 100 ms.
• If there is a lower pressure drop, increase the parameter value for the "Pressure
change sample time" (e. g. to 10), i. e. the pressure change will be displayed every 1 s.
• Vary the value for the "Pressure change sample time", until you have determined a
suitable value for your system.
3. MSE6-E2M Switch to the "Blocking" status.
4. Record pressure change values of the selectable input word (Em. 5).
For this, Am.1 must have the value 0.
A pressure change is a signed value and, when there is a pressure drop, can thus be a
negative value.
5. Generate the amount of the pressure change (sign reversal for negative values).
6. Determine the amount of the greatest pressure change value.
7. Through multiple switching from the Pressurisation to the Blocking status, determine the amount of
the maximum pressure change value.
If you have obtained very low values, it may be wise to increase the value for the paramet­
er "Pressure change sample time".
8. Specify this value, with an added safety tolerance, for the parameter "Upper limit pressure change".
In this way, you can avoid accidental error messages.
Example values:
– Parameter "Pressure change sample time": 1 s
– Parameter "Upper limit pressure change":
– Amount of maximum pressure change value: 160 mbar
– Set limit value including safety tolerance: 200 mbar
Monitoring of the pressure change only takes place in the status "Blocking".
Festo – MSE6-E2M-SY-EN – 1703d – English 113