NORD Drivesystems BU0280 - Manual (Page 69)

7 DeviceNet data transmission
BU 0280 GB Subject to technical amendments 69
7.2.3 Setpoint and actual values
7.2.3.1 Setpoint 1 (SW1)
The function of the first setpoint is set in the parameter "Function bus setpoint 1" (SK 200E: (P546[01]) or
SK 500E: (P546)) (see relevant frequency inverter manual).
In the order telegram, setpoint 1 follows immediately after the control word. Setpoint 1 is pre-set to the
transfer of a setpoint frequency (16 bit value).
PZD1 PZD2 PZD3 PZD4
STW SW1 SW2 SW3
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
The setpoint is transferred as an integer in the range -32768 to 32767 (8000 hex to 7FFF hex), whereby
16384 (4000 hex) is exactly 100% and -16383 (C000 hex) corresponds to -100%. Due to this resolution,
setpoints (depending on function) of up to ± 200% can be transferred.
A setpoint of 100% corresponds to the respective nominal value:
Setting 100% is equal to
Off
Setpoint frequency, actual frequency PID, actual
frequency PID limited, actual frequency PID monitored,
frequency addition, frequency subtraction, maximum
frequency Maximum frequency
Torque current limit Torque current limit (P112)
Current limit Inverter nominal current
Servo mode torque Nominal torque
Lead torque Lead torque (P214)
7.2.3.2 Setpoints 2 and 3 (SW2/3)
If the PPO type 2 or 4 is used, in addition to setpoint 1, a second setpoint can be transferred in word PZD3
and a third setpoint in PZD4.
PZD1 PZD2 PZD3 PZD4
STW SW1 SW2 SW3
The definition of these two setpoints corresponds to that of setpoint 1.
However, the transfer of a third (maximum 16 Bit) setpoint is only possible if the other two setpoints are also
16 Bit values.
If the transfer of a 32 bit setpoint is necessary (Example: setpoint position), this must be divided into two 16
bit values, i.e. into two PZDs (position High and Low word).
PZD1 PZD2 PZD3 PZD4