Siemens MICROMASTER 420 Reference Manual page 37

Using OFF3 instead of OFF1.
Set P0701 = 99 to enable BiCo function.
Set P0840 = 722.0 (On right via digital input 1).
Set P0848 = 722.0 (OFF3 via digital input 1).
Now the inverter will ramp between set points using the normal ramp time as set in
P1120 and 1121. However, at switch off from digital input 1, the inverter will turn
off with an OFF3, using the ramp rate set in P1135, which may be different to
P1121.
An additional advantage is that the OFF3 function usually requires a second digital
input; here the BiCo function permits digital input 1 to perform a run right and an
OFF3.
Selecting an alternative ramp time when a certain fixed frequency is selected.
Three fixed frequencies are selected using three digital inputs.
The digital inputs also select 'on right'.
The third digital input also selects the alternative (Jog) ramp times.
This will only enable an alternative ramp up time, because, when digital input 3 is
switched low it will also de-select the alternative ramp time. Normal ramp down
time will therefore be used.
1 Use fixed frequencies.
2 Enable BiCo
functionality.
3 Define source of Fixed
Frequencies.
4 Define mode of
operation.
5 Select Jog ramp times
instead of normal ramp
times.
Steps 3 and 4 use BiCo functions to set digital input 1 and 2. This function can
also be set using normal parameterization in Level 2.
MICROMASTER 420 Reference Manual
Issue A1
P1000 = 3
P0701 = 99
P0702 = 99
P0703 = 99
P1020 = 722.1 Defines the source of each fixed
P1021 = 722.2 frequency as digital input 1, 2, and 3.
P1022 = 722.3
P1016 = 2 Sets the mode of operation of fixed
P1017 = 2 frequencies to "select fixed
P1018 = 2 frequency and on right command".
P1124 = 722.2 Enables digital input 3.
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