24
Festo — MSE6-C2M — 2022-08b
Functions
If the auto enable output controller is activated in the AUTO_HOLD status, Am.0.5 = 1, the shut-off
valve switches to the shut-off state and the new module status is AUTO_SHUTOFF, Em.3.8-3.11 = 11.
As soon as pressure P2 has fallen to the set auto standby setpoint pressure, the module status
switches to the AUTO_STANDBY state, Em.3.8-3.11 = 12. The shut-off valve is open again and the
pressure regulating valve regulates to the auto standby setpoint pressure.
A change from the AUTO_STANDBY module state with auto standby setpoint pressure to the
AUTO_NORMAL module state with auto normal setpoint pressure is only possible after reset of the
Q_low-Timers.
While the pressure is increasing the function is in the AUTO_RISE module status, Em.3.8-3.11 = 13.
In this state, the slope of the pressure rise is limited to the value set with the setpoint pressure rise
limitation parameter, Pm.28.4-28.6.
The following figure gives an overview of the relevant measurement, control and status signals of
the automatic pressure regulation and blocking function. In order to reset the Q_low-Timers, the
Q_low-Timer-Reset output, Am.0.2, is set as signal source.
Em.0:
flow rate
Pm.19-20:
Auto
control of
flow rate
critical limits
Em.2:
pressure P2
Pm.17-18:
auto control of
time delay
Em.3.8-3.11:
module status
8:
AUTO_
NORMAL
9:
AUTO_
WAIT
8:
AUTO_
NORMAL
9:
AUTO_
WAIT
11:
AUTO_
SHUTOFF
13:
AUTO_
RISE
Em.3.4-3.5:
status of
Q_low timer
0:
RES
0:
RES
1:
RUN
2:
UP
1:
RUN
0:
RES
Em.3.0:
status
shut-off valve
Am.0.2:
Q_LOW
timer reset
t
Am.0.5:
control of
auto enable
10:
AUTO_
HOLD
2:
UP
Shutoff
= 1
0
1
0
1
0
Pm.17-18:
auto control of
time delay
8:
AUTO_
NORMAL
9:
AUTO_
WAIT
Pm.17-18:
auto control of
time delay
10:
AUTO_
HOLD
0:
RES
1:
RUN
2:
UP
Pm.21-22:
pressure set
point
auto normal
Pm.23-24:
pressure
setpoint
auto standby
12:
AUTO_
STANDBY
8:
AUTO_
NORMAL
Pm.28.4-28.6:
target pressure
rise
limitation
2:
UP
0:
RES
Fig. 13: Automatic pressure control and blocking operation
