Danfoss VLT AutomationDrive FC 360, Руководство по программированию

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4.2 Process Data
Use the process data part of the PPO to control and
monitor the frequency converter via the PROFINET.
4.2.1 PCD
Control word (CTW) according to PROFIdrive profile:
Control words consist of 16 bits. The meaning of each bit
is explained in and . The following bit pattern sets all
necessary start commands:
0000 0100 0111 1111 = 047F hex.
1)
0000 0100 0111 1110 = 047E hex.
1)
0000 0100 0111 1111 = 047F hex.
1) For restart after power-up:
•
Set bits 1 and 2 of the CTW to 1.
•
Toggle bit 0 0–1.
These values are for bytes 9 and 10 in Table 4.1 .
Quick stop: 0000 0100 0110 1111 = 046F hex.
Stop: 0000 0100 0011 1111 = 043F hex.
4.2.2 MRV
MRV is the speed reference with data format Standardized
value . 0 hex = 0% and 4000 hex = 100%.
In the example, 2000 hex is used corresponding to 50% of
the maximum frequency in
parameter 3-03 Maximum
Reference . See the values for bytes 11 and 12 in Table 4.1 .
The whole PPO therefore has the following values in hex:
Byte Value
PCD
CTW 9 04
CTW 10 7F
MRV 11 20
MVR 12 00
Table 4.1 Request Example: PPO Values in Hex
The process data within the PCD part acts immediately
upon the frequency converter and can be updated from
the master as quickly as possible.
Table 4.2 shows a positive response to the request example
from Table 4.1 .
Byte Value
PCD
STW 9 0F
STW 10 07
MAV 11 20
MAR 12 00
Table 4.2 Response Example: Positive Response
The PCD part responds according to the state and parame-
terization of the frequency converter.
PCD part response:
•
STW: 0F07 hex means that the motor is running
and there are no warnings or faults.
•
MAV: 2000 hex indicates that the output
frequency is 50% of the maximum reference.
Table 4.3 shows a negative response to the request
example from Table 4.1 .
Byte Value
PCD
STW 9 0F
STW 10 07
MAV 11 20
MAR 12 00
Table 4.3 Response Example: Negative Response
4.2.3 Process Control Data
Process control data (PCD) is the process data sent from
the PLC to the frequency converter.
Master/slave
1 2 3 ....... 10
CTW MRV PCD ....... PCD
PCD write
Table 4.4 Process Control Data
PCD 1 contains a 16-bit control word, and each bit controls
a specific function of the frequency converter. See
chapter 4.3 Control Profile .
PCD 2 contains a 16-bit speed setpoint in percentage
format. See
chapter 4.2.5 Reference Handling .
The settings in parameter 9-15 PCD Write Configuration and
parameter 9-16 PCD Read Configuration define the content
of PCD 3 to PCD 10.
Control Programming Guide
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