3 Function description
BU 0510 EN
technische Änderungen vorbehalten
21
3.4 Teach-In function via digital inputs or BUS I/O In Bits
The parameterisation of the absolute setpoint positions (position array) can be implemented via the function
"Teach-In“" alternatively to direct input.
Two inputs are required for "Teach-In" via digital inputs or Bus IO In Bits. One input or one of the parameters P420
– P425, 470 or 480 must be parameterised to the function [24] "Teach-In" and another to the function [25] "Quit
Teach-In". The "Teach-In" is started with the signal "1" at the corresponding input and remains active until the
signal is cancelled. When the signal "Quit Teach-In" is changed from 0 to 1, the actual position value is saved in
parameter P613 "Position" as the setpoint position. The position number or the position array element or position
increment array element is specified via the position specification (Bit 0 – 3 position (increment) array) of the digital
inputs or Bus IO In Bits in parameter P420 – P425, 470 or 480 with one of the functions [55 to 58] "Bit 0–3 for
position (increment) array". If an input is not activated (corresponds to position 0), the position number is generated
with an internal counter. The counter is increased after each position acceptance. At the start of "Teach-in" with the
position specification 0 the counter is set to 1, when the value is accepted with "Quit Teach-In" the counter is
increased. As soon as a position is addressed via the digital inputs, the counter is set to this position.
While "Teach-In" is active, the frequency inverter can be controlled with enable signals and frequency setpoints
(identical to the parameter P600 "Position control" = "Off").
The function "Teach-In" can also be realised via a serial interface or the Bus IO In Bits. To do this, one of the bus
setpoints (P546, P547 and P548 "Function bus setpoint) must be set to "Bus IO In Bits 0..7" and the functions of
the corresponding bits must be assigned in P480 "Function Bus I/O In Bits".
NOTE:
Further details on the setting options for functions can be found in the respective parameter
descriptions in Chapter 4 Parameter settings.
3.5 Ratio of setpoint and actual values (P607 and P608)
The position values are generally based on the motor revolutions. If another value is required, the "Ratio" and
"Reduction ratio" can be converted to another unit with the aid of the parameters P607 [03] and P608 [03]. Decimal
points cannot be entered in the parameters "Ratio" and "Reduction ratio". To achieve a greater accuracy, both
values should be multiplied equally with a high a factor as possible. The product must not exceed the value 65000,
therefore the factor must not be too large.
Example:
Lifting equipment
Unit in [cm]
Gear unit: i = 26.3
Drum diameter: d = 50.5 cm
Factor: 100 selected
Rev.
cm
cm
Ratio
P
ratio
Reduction
P
6
2630
15865
100
3
,
26
100
65
,
158
3
,
26
5
,
50
]
3
[
607
]
3
[
608
≈
=
×
×
=
×
=
π
NOTE:
The required unit can be selected in parameter P640 "Unit pos. values" In this example, parameter
P640 "Unit pos. values" must be parameterised to the function 4 = cm.
