NORD Drivesystems BU0210 - Manual (Page 24)

SK 2x5E with "PosiCon Functionality"
24 Subject to technical amendments BU 0210 GB
If the absolute setpoint position is specified via Bus IO In Bits, the position number results from bits 0...3 of the
serial interface. For this, a bus setpoint value (P546[01] ...[03] "Function Bus - Setpoints") must be set in the
setting "Bus IO In Bits 0...7" and the functions assigned to the corresponding bits under P480 "Function Bus
I/O In Bits".
NOTE: For further details of possible functionality settings, please refer to the relevant parameter
description in Section 4 "Parameter settings“.
3.3.2 Position increment array– relative setpoint position via digital inputs or BUS I/O In Bits
The position setpoint value "Position Increment Array" is especially advisable for endless axes. For this, the
function 1 = "Position Increment Array" must be parameterised in parameter P610 "Setpoint Mode". Up to 4
digital inputs or Bus IO Bits can each be assigned an input signal for one of the 4 position increment array
elements. If the input signal changes from "0" to "1" the value of the element is added to the setpoint position.
The values can be positive or negative, so that a return to the starting position is also possible. The addition is
carried out on each positive signal flank, regardless of whether or not the inverter is enabled. A multiple of the
parameterised increment can be specified with several consecutive pulses to the allocated input. The pulse
width and the width of the pauses between pulses must be at least 10 ms.
If the relative setpoint position is specified via Bus IO Bits, bits 0...3 of the serial interface are each assigned to
the position increment array. For this, a bus setpoint value (P546[01] ...[03] "Function Bus - Setpoints") must
be set in the setting "Bus IO In Bits 0...7" and the functions assigned to the corresponding bits under P480
"Function Bus I/O In Bits".
NOTE: For further details of possible functionality settings, please refer to the relevant parameter
description in Section 4 "Parameter settings“.
3.3.3 Bus setpoints
The transfer of the setpoint can be carried out via various field bus systems. The position can be specified in
terms of rotations or increments. A rotation of the motor then corresponds to a resolution of 1/1000 rotation or
32768 increments
. The source of the bus setpoint must be selected in parameter P510 "Setpoint Source" in
the menu group "Additional Functions". The position setpoints to be transferred via the bus must be set in
parameters P546[01]…[03] "Function Bus Setpoints"
In order to utilise the entire positioning area, the High and Low words should be used. With this, a 32 bit
position setpoint can be specified via a control unit.
Example: One motor rotation (See value P602) = 1.000 revolution. = Bus setpoint 1000
deC
.
NOTE: For further details concerning bus setpoints please refer to the relevant BUS operating
instructions.