3. Press «Enter».
The setting mode is active.
4 0 0 m b a r 0 8 : 1 5 A M 8 0 ° C
Header
5.4.2 Pressure control
Menu
Source actual pressure p1,p2
Active line
Source set pressure p1,p2
Local set pressure 1.0bar
KP 1.0rpm / mbar
KI 1.00rpm / (mbar *s)
Set pressure rise time 0s
4. Select the required source with «Up» or «Down».
5. Press «Enter».
The setting is applied.
6. Press «Escape» repeatedly to leave this menu.
Result The source for the actual pressure is specified.
8.6.4.2 Setting the required working pressure
A PI controller with anti-wind-up reset and upstream target value delay is used for controlling the
pressure.
The speed calculated by the PI controller is limited to the minimum and maximum speeds permissi‐
ble for the specific blower block. The difference of the speed upstream or downstream of the speed
limitation is used for the correction of the I-portion (anti-wind-up reset).
If the operation control is in STOP, READY, SHUT-DOWN or MOTOR START operating mode, the
effective target pressure is: 0 bar. At the end of the motor start, the effective target pressure of 0
bar starts to rise to the target pressure set in the menu. The effective target pressure rises linearly.
The target pressure is limited by the maximum working pressure of the machine.
Precondition Access level 2 is activated.
1. Open the 5.4.2
<Configuration – Operating modes – Pressure control>
menu.
2. Use «Up» or «Down» to select the
Local set pressure
line.
3. Press «Enter».
The setting mode is active.
4 0 0 m b a r 0 8 : 1 5 A M 8 0 ° C
Header
5.4.2 Pressure control
Menu
Source actual pressure p1,p2
Source set pressure p1,p2
Local set pressure 1.0bar
Active line
KP 1.0rpm / mbar
KI 1.00rpm / (mbar *s)
Set pressure rise time 0s
4. Use «Up» or «Down» to set the value for
Local set pressure
.
8 Initial Start-up
8.6 Operating modes in frequency-controlled machines
96
Service Manual Controller
SIGMA CONTROL 2 BLOWER ≥ 2.5.3 No.: 901700 10 E
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