8 actual value 2 and 3 (iw2/3), Second and third actual value sk 5xxe (iw2/3), 4 frequency inverter status machine – NORD Drivesystems BU0020 User Manual
Page 81: Actual value 2 and 3 (iw2/3), Frequency inverter status machine, 7 data transmission
7 Data transmission
BU 0020 GB-2612
81
7.3.8 Actual value 2 and 3 (IW2/3)
It is possible to transfer two further actual values to the controller if PPO type 2 or 4 is used for
transfer.
The assignment of the actual values 2 and 3 to the process data words PZD3 and PZD4 is carried out
in the same way as the assignment of setpoints 2 and 3. These also differ in sequence between the
SK 5xxE and other inverter series.
Second and third actual value SK 300E/SK 700E/SK 750E (IW2/3)
The actual value 2 (IW2) is transmitted in PZD4. The value to be transferred can be selected in P544
(actual bus value 2). Actual value 3 (IW3) can be transmitted in PDZ3 if actual value 1 is not a 32 Bit
value. The value to be transferred can be selected in P545 (actual bus value 3).
Second and third actual value SK 5xxE (IW2/3)
The actual value 2 (IW2) is transmitted in PZD3. The value to be transferred can be selected in P544
(actual bus value 2). The actual value 3 (IW3) is transmitted in PZD4. The value to be transferred can
be selected in P545 (actual bus value 3).
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7.4 Frequency inverter status machine
The frequency inverter passes through a status machine. The changes between various states are
triggered by the respective control commands in the process data control word. The actual status is
returned in the process data status word. After switching on, the inverter is in switch-on disabled
status.
This status can only be ended by transmitting the “Shut down (Off 1)” command. The answer to
a master telegram normally does not yet contain a reaction to the control command. The controller
must check the answers from the slaves as to whether the control command has been carried out.
The following bits indicate the status of the frequency inverter:
Status
Bit6
Switch-on
disable
Bit5
Emergency
stop
Bit4
Disable
voltage
Bit3
Fault
Bit2
Operation
enabled
Bit1
Standby
Bit0
Ready for
switch-on
Not ready to start
0
X
X
0
0
0
0
Starting disabled
1
X
X
0
0
0
0
Ready to start
0
1
1
0
0
0
1
Activated
0
1
1
0
0
1
1
Operation enabled
0
1
1
0
1
1
1
Fault
0
X
X
1
0
0
0
Error active
0
X
X
1
1
1
1
Emergency stop active
0
0
1
0
1
1
1