GE Industrial Solutions AF-650 GP PROFINET - Manual (Page 23)

6 How to Control the Frequency Converter
6.1 PPO Types
The PROFIdrive profile for frequency converters specifies a number of communication objects (Parameter Process data
Objects, PPO), which are suitable for data exchange between a process controller, such as a PLC, and frequency converters.
All PPOs are defined for cyclic data transfer, so that process data (PCD) can be transferred from the controller to the slave
and vice versa. Table 6.1 shows the PPO types available for the GE AF-650 GP & AF-600 FP drives..
PPO types 3, 4, 6, 7 and 8 are pure process data objects for applications requiring no cyclic parameter access. The PLC sends
out process control data, and the frequency converter then responds with a PPO of the same length, containing process
status data. The first two bytes of the process data area (PCD 1) comprise a fixed part present in all PPO types. The first two
words of the process data area (PCD 0 and PCD1) comprise a fixed part present in all PPO types. The following data (PCD 2
to PCD 9) are flexible for PCD write entries (PB-15 PCD Write Configuration, and for PCD read entries (PB-16 PCD Read Config-
uration. The to parameters can be parameterised with process signals from the list on PB-23 Parameters for Signals.
Select the signals for transmission from the master to the frequency converter in PB-15 PCD Write Configuration (request
from master to the frequency converter). Select the signals for transmission from the frequency converter to the master in
PB-16 PCD Read Configuration (response: Drive
→ master).
The choice of PPO type is made in the master configuration, and is then automatically recorded in the frequency converter.
No manual setting of PPO types in the frequency converter is required. The current PPO type can be read in PB-22 Telegram
Selection.
Selection [1] Standard telegram 1 is equivalent to PPO type 3.
PCD
0 1 2 3 4 5 6 7 8 9
PB-15 PCD
Write
Configu-
ration +
PB-16 PCD
Read Config-
uration
index. no.: [0] [1] [2] [3] [4] [5] [6] [7] [8] [9]
CTW MRV PCD PCD PCD PCD PCD PCD PCD PCD
STW MAV
Type 3:
Type 4:
Type 6:
Type 7:
Type 8:
CTW:
Control word
STW: Status word
MRV: Main reference value
MAV: Main actual value (Actual output frequency)
Table 6.1
How to Control the Frequenc... PROFINET Operating Instruction
22
6 6