GE Industrial Solutions AF-650 GP PROFINET - Manual (Page 24)

6.2 Process Data
Use the process data part of the PPO for controlling and
monitoring the frequency converter via the PROFINET.
6.2.1 Process Control Data
Process data sent from the PLC to the frequency converter
are defined as Process Control Data (PCD).
Master slave
0 1 2 ...... 9
CTW MRV PCD ...... PCD
PCD write
Table 6.2
PCD 0 contains a 16-bit control word, where each bit
controls a specific function of the frequency converter, see
6.3 Control Profile. PCD 1 contains a 16-bit speed set point
in percentage format. See 6.2.3 Reference Handling .
The content of PCD 2 to PCD 9 is programmed in
PB-15 PCD Write Configuration and PB-16 PCD Read Configu-
ration.
6.2.2 Process Status Data
Process data sent from the frequency converter contain
information about the current state of the drive.
Slave master
0 1 2 ...... 9
STW MAV PCD ...... PCD
PCD read
Table 6.3
PCD 0 contains a 16-bit status word, where each bit
contains information regarding a possible state of the
frequency converter.
PCD 1 contains per default the value of the current speed
of the frequency converter in percentage format (see 6.2.3
Reference Handling ).
The content of PCD 2 to PCD 9 is programmed in
PB-16 PCD Read Configuration.
6.2.3 Reference Handling
The reference handling in the GE AF-650 GP & AF-600 FP
drives is an advanced mechanism that sums up references
from different sources.
For more information on reference handling, please refer
to the AF-650 GP or AF-600 FP Design Guides.
Illustration 6.1
The reference, or speed set point (MRV, send via PROFINET
is always transmitted to the frequency converter in
percentage format as integers represented in hexadecimal
(0-4000 hex).
How to Control the Frequenc... PROFINET Operating Instruction
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