Consumption - Festo MSE6-E2M Original Instructions Manual

5 Measurement and control functions
5.2

Consumption

Input signal
The consumption value is based on the prepared measured flow value. The value is prepared according
to the parameters "Unit Consumption" (P8.4-8.5) and "Unit Flow standard" (P8.6-8.7) and made avail­
able as an input signal (Em.1).
If there is a change to the parameter values "Unit Flow" or "Unit Flow standard", the
measured consumption value is reset to the value "0".
If there is a change to the parameter value "Unit Consumption", the current measured
consumption value is saved and is converted to the new consumption unit.
Consumption measurement
Consumption measurement is controlled using two data bits in the output word Am.0. Consumption
measurement is started, continued or stopped using the "Consumption measurement control bit" out­
put (Am.0.12). The measured consumption value can be reset to the value "0" using the "Reset con­
sumption measurement" output (Am.0.13).
Monitoring of parameters
The parameters "Unit Flow", (P8.2-8.3), "Unit Flow standard" (P8.6-8.7) and "Unit Consumption"
(P8.4-8.5) are checked on entry for permitted values. In case of error, the appropriate error message is
output if parameterisation error monitoring is activated (P0.7).
Module number m = 1
Function number = 4828 + m * 64 + parameter number
P8.2-8.3
1
Data check
Sensor
error
Flow
Scaling
1
Parameter "Unit Flow"
2
Parameter "Unit Flow standard"
3
Parameter "Unit Consumption"
4
Output control bit "Reset consumption
measurement"
Fig. 5.2 Block diagram of the "Consumption" function
52
P8.6-8.7 P8.4-8.5
2 3
Data check
Data check
Scaling
Consumption measurement
Am.0.13 Am.0.12
4 5
Reset
Run/Stop
5
Output control bit "Consumption measure­
ment"
6
Parameter "Parameterisation error dia­
gnostics"
Festo – MSE6-E2M-SY-EN – 1703d – English
P0.7
6
Error message
Parameterisation
error
Em.1: Consumption