Process Data; Reference Handling - GE AF-650 GP PROFINET Operating Instructions Manual

How to Control the Frequenc...

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
CTW MRV PCD
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 Configuration.
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
STW MAV PCD
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.
PROFINET Operating Instruction
...... 9
...... PCD
PCD write
...... 9
...... PCD
PCD read
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.
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).
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