Danfoss VLT AutomationDrive FC 360, Руководство по программированию

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4 Control
4.1 PPO Types
The PROFINET profile for frequency converters specifies a
number of standard telegrams and provides space for
vendor-specific telegrams. The PROFIdrive profile for
frequency converters is suitable for data exchange
between a process controller (for example PLC) and a
frequency converter. All telegrams are defined for cyclic
data transfer of high-priority data.
Pure process data objects
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.
Illustration 4.1 shows the available PPO types:
•
PCD 1: The first 2 bytes of the process data area
(PCD 1) comprise a fixed part present in all PPO
types.
•
PCD 2: The next 2 bytes are fixed for PCD write
entries (see
parameter 9-15 PCD Write Configu-
ration [1]), but configurable for PCD read entries
(see parameter 9-16 PCD Read Configuration [1]).
•
PCD 3–10: In the remaining bytes, the process
data can be parameterized with process signals,
see
parameter 9-23 Parameters for Signals .
The setting in parameter 9-15 PCD Write Configuration
determines the signals for transmission (request) from the
master to the frequency converter.
The setting in parameter 9-16 PCD Read Configuration
determines the signals for transmission (response) from the
frequency converter to the master.
Select the PPO type in the master configuration. The
selection is automatically recorded in the frequency
converter. No manual setting of PPO types in the
frequency converter is required. Read the current PPO type
in
parameter 9-22 Telegram Selection . The setting [1]
Standard telegram 1 is equivalent to PPO type 3.
In addition, all PPO types can be set up as word-consistent
or module-consistent. The process data area can be word-
consistent or module-consistent, whereas the parameter
channel must always be module-consistent.
•
Word-consistent data is transmitted as individual,
independent words between the PLC and the
frequency converter.
•
Module-consistent data is transmitted as sets of
interrelated words transferred simultaneously
between the PLC and the frequency converter.
Standard telegram
1
PPO 6
PPO 7
PPO 8
Danfoss telegram
(The old PPO type 3)
CTW/STW REF/MAV
PCD 2
Read/
Write
PCD 3
Read/
Write
PCD 4
Read/
Write
PCD 5
Read/
Write
PPO 4
CTW/STW REF/MAV
PCD 2
Read/
Write
PCD 3
Read/
Write
CTW/STW REF/MAV
PCD 2
Read/
Write
PCD 3
Read/
Write
PCD 4
Read/
Write
PCD 5
Read/
Write
PCD 6
Read/
Write
PCD 7
Read/
Write
PCD 8
Read/
Write
PCD 9
Read/
Write
CTW/STW REF/MAV
PCD 2
Read/
Write
PCD 3
Read/
Write
PCD 4
Read/
Write
PCD 5
Read/
Write
PCD 6
Read/
Write
PCD 7
Read/
Write
CTW/STW REF/MAV
CTW/STW REF/MAV
PPO 3
130BE941.10
Illustration 4.1 Available PPO Types
Control PROFINET
10 Danfoss A/S © 04/2017 All rights reserved. MG06G102
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