NORD Drivesystems BU0280 User Manual
Page 70
Supplementary Manual DeviceNet for NORDAC SK 200E
70
Subject to technical amendments
BU 0280 GB
STW
SW1
SW2
The definition in the frequency inverter can then, for example, be made via the parameters:
PZD3:
“Bus function setpoint 2"
(SK 200E: (P546[02]) or SK 500E (P547)) and
PZD4:
“Bus function setpoint 3"
(SK 200E: (P546[03]) or SK 500E (P548))
Example
If a position setpoint is to be transferred (Prerequisite: posicon inverter functionality) this can be performed
either as a 16 bit or 32 bit value. The resolution is always 0.001 rotations/step.
A value range of +32767 (= 32.767 revolutions) to -32768 (= -32.768 revolutions) is possible as a 16 Bit
value. Here, exactly one PZD word is required in order to transfer the position.
The full position range of +/- 50000.000 revolutions is available as a 32 Bit value. Here, exactly two PZD
words are required in order to transfer the position.
7.2.3.3 Actual value 1 (IW1)
The function of the actual value is set in the parameter "Function bus actual value 1" (SK 200E: (P543[01])
or SK 500E: (P543)) (see relevant frequency inverter manual).
In the order telegram, actual value 1 follows immediately after the control word. The actual value 1 is pre-set
to the transfer of the current output frequency of the frequency inverter (16 bit value).
PZD1 PZD2 PZD3 PZD4
ZSW IW1
IW2
IW3
15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
The actual value is transferred as an integer in the range -32768 to 32767 (8000 hex to 7FFF hex), whereby
in the settings "actual frequency", "actual speed", "current" and "torque current", the values 16384 (4000
hex) exactly correspond to 100% and -16383 (C000 hex) correspond to exactly -100%. Due to this
resolution, setpoints (depending on function) of up to ± 200% can be transferred.
7.2.3.4 Actual values 2 and 3 (IW2/3)
If the PPO type 2 or 4 is used, in addition to actual value 1, a second actual value can be transferred in word
PZD3 and a third actual value in PZD4.
PZD1 PZD2 PZD3 PZD4
ZSW
IW1
IW2
IW3
The definition of these two actual values corresponds to that of actual value 1.
If the transfer of a 32 bit actual value is necessary (Example: actual position), this must be divided into two
16 bit values, i.e. into two PZDs (position High and Low word).
PZD1 PZD2 PZD3 PZD4
ZSW
IW1
IW2
The definition in the frequency inverter can then, for example, be made via the parameters: