26
Festo — MSE6-C2M — 2022-08b
Functions
5.1.5.5
Function structure
Unit
flow
rate
Pm.8.2
-8.3
Flow
rate
standard
Pm.8.6
-8.7
Auto
control of
flow rate
critical
limit
Pm.19
-20
Auto
control of
delay
time
Pm.17
-18
Moni-
toring of
Uaus/
Uven
Pm.0.2
Scaling
Compa-
rator
FN29, Am.0:
parameterisation
error
Em.3.4-3.5:
status of
Q_low_timer
Pressure
regulation and
blocking
function
Flow
rate
Q_low
timer
FN26, Am.0:
undervoltage
actuator
supply
Q_low
timer
reset
Am.0.2
FN29,
Em.0, Em.2:
paramaterisation
error
Target
pressure
user
selection
Am.0.3
-0.4
Target
pressure
user
Am.2
Target
pressure
rise
limit-
ation
Pm.28.4
-28.6
Moni-
toring of
para-
meter
Pm.0.7
Auto
control of
shutoff valve
and
auto
target
pressure
calculation
Pressure regulator
DI0
Em.3.2
DI1
Em.3.3
OR
Q_low-
timer
reset
selection
Pm.28.0
-28.1
Moni-
toring of
actuator
supply
Module status
Em.3.8-3.11:
module
status
Pressure
Unit
pressure
Pm.8.0
-8.1
Data
check
Pressure
set-
point
auto
normal
Pm.21
-22
Target
pressure
value
auto
standby
Pm.23
-24
FN29, Am.1:
parameterisation
error
Target
pressure
rise
limitation
Shut-off
valve
Em.3.0:
status of
shutoff valve
Pm.31-32:
switching cycles of
shutoff valve
Control of
shut-off
valve
Am.0.0
Control of
auto
user
Am.0.1
Numerator
Target
pressure
power-
on
Pm.28.2
Target
pressure
value
limitation
2.5...10 bar
Control
of
auto
enable
Am.0.5
Reset
10 bar
Data
check
Data
check
Data
check
Data
check
Data
check
Scaling
2.5 bar
6 bar
OFF
1
0
Fig. 14: Block diagram of the pressure control and blocking function
Q_low-Timer
The Q_low-Timer function continuously compares the processed flow rate measured value with the
auto-controller flow rate limit value parameter. If the critical limits are undershot, the Q_low-Timer is
started. The Q_low-Timer enters the UP status if the flow rate limit value is undershot for the time
parameterised in the auto-controller delay time parameter, Pm.17-18.
The timer status is displayed in the status input Q_low-Timer, Em.3.4-3.5, and can have the following
values:
–
0 = RES: the timer is reset and not started.
–
1 = RUN: the timer has been started and is running.
