Lenze L-force 8400 BaseLine D - Deactivation of motor potentiometer; Save current output value after mains failure

Firmware 03.00 - DMS EN 5.0 - 07/2009 L 153
8400 BaseLine D | Software Manual
Function library
Function blocks
9.1.2.2 Deactivation of motor potentiometer
When the motor potentiometer is deactivated by setting bInAct to TRUE, the nOut_a
output signal responds according to the function selected via Function.
[9.3] Example: Deactivation of the motor potentiometer when the function 1, C804 = 1, has been selected
9.1.2.3 Save current output value after mains failure
To save the last actual value at nOut_a after a mains failure, declare a RETAIN variable and
combine this with the FB instance as shown in the following illustration:
 This variable always saves the current value at nOut_a. Even in case of mains failure the
variable keeps the value.
 When the mains is switched on again, the value saved in the variable is read into the FB
L_MPOT and processed as starting value.
 When the motor potentiometer is deactivated, nOut_a is reduced to 0 % with the deceleration time wTif.
 If it is activated again, nOut_a is increased again to nLowLimit with the acceleration time wTir.
nOut_a
t
t
TRUE
FALSE
bUp
t
TRUE
FALSE
bDown
nHighLimit
nLowLimit
0
wTir
wTif
wTir
t
TRUE
FALSE
bInAct
wTif
wTif
01
VAR RETAIN
L_MPot
nOut_a
bUp
bDown
bInAct
dnActRetain
dnActRetain
0
1
C806
nln_a
bEnable
C804
C805
C800
C802
C801
C803
CTRL
VAR RETAIN