Process Data - Danfoss VLT AutomationDrive FC 360 Programming Manual

Control

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.
0000 0100 0111 1110 = 047E hex.
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:
CTW
CTW
PCD
MRV
MVR
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.
STW
STW
PCD
MAV
MAR
Table 4.2 Response Example: Positive Response
MG06G102
Programming Guide
1)
1)
Byte Value
9 04
10 7F
11 20
12 00
Byte Value
9 0F
10 07
11 20
12 00
Danfoss A/S © 04/2017 All rights reserved.
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.
STW
STW
PCD
MAV
MAR
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
CTW MRV PCD
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.
Byte Value
9 0F
10 07
11 20
12 00
3 ....... 10
....... PCD
PCD write
11
4 4