Danfoss VLT PROFIBUS DP MCA 101 User Manual

4 Control
4.1 PPO Types
The PROFIBUS prole for frequency converters species a
number of communication objects (parameter process data
objects, PPO). The PROFIBUS prole for frequency
converters is suitable for data exchange between a process
controller (for example PLC) and a frequency converter. All
PPOs are dened for cyclic data transfer (DP-V0) for
transferring process data (PCD) and parameters (PCA) from
the master to the slave, and conversely.
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
rst 2 bytes of the process data area
(PCD 1) comprise a xed part present in all PPO
types.
•
PCD 2: The next 2 bytes are
xed for PCD write
entries (see parameter 9-15 PCD Write Congu-
ration [1]), but congurable for PCD read entries
(see parameter 9-16 PCD Read Conguration [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 Conguration
determines the signals for transmission (request) from the
master to the frequency converter.
The setting in parameter 9-16 PCD Read Conguration
determines the signals for transmission (response) from the
frequency converter to the master.
Parameter channel and process data
PPO types 1, 2, and 5 consist of a parameter channel and
process data. Use the parameter channel for reading
and/or updating of parameters (successively). Alternatively,
for better utilization of I/O and PLC capacity, access
parameters via DP-V1. To access via DP-V1, select a pure
process data object (PPO type 3, 4, 6, 7, or 8).
Select the PPO type in the master conguration. 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-
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.
Control Programming Guide
MG37G202 Danfoss A/S © 01/2016 All rights reserved. 13
4 4

Danfoss VLT PROFIBUS DP MCA 101 Specifications

General

Model	VLT PROFIBUS DP MCA 101
Protocol	PROFIBUS DP
Communication Protocol	PROFIBUS DP
Humidity	5% to 95% (non-condensing)
Protection Class	IP 20
Category	Media Converter
Compatibility	VLT AutomationDrive FC 302
Baud Rate	9.6 kbit/s to 12 Mbit/s
Power Supply	24 V DC
Isolation	Galvanic isolation
Operating Temperature	-10°C to 50°C

Summary

2 Safety

2.1 Safety Symbols

Defines warning symbols used in the manual to indicate potential hazards and precautions.

2.2 Qualified Personnel

Specifies requirements for personnel authorized to install, operate, and maintain the frequency converter safely.

2.3 Safety Precautions

Details critical safety warnings related to high voltage, unintended starts, and discharge time for safe operation.

3 Configuration

3.1 Configure the PROFIBUS Network

Guides on ensuring unique station addresses for all PROFIBUS devices on the network.

3.1.1 Setting the PROFIBUS Address using the DIP Switches

Describes how to set the PROFIBUS address for the frequency converter using hardware DIP switches.

3.2 Configure the Master

Explains the process of configuring the PROFIBUS master using a GSD file for the frequency converter series.

3.2.1 GSD File

Details the necessity and import procedure of the GSD file for PROFIBUS master configuration.

3.3 Configure the Frequency Converter

Outlines key parameters for configuring the frequency converter with a PROFIBUS interface.

3.3.1 Frequency Converter Parameters

Lists important parameters for PROFIBUS configuration, including control word, timeout, and diagnostic settings.

4 Control

4.1 PPO Types

Describes Parameter Process Data Objects (PPO) for data exchange between a process controller and a frequency converter.

4.3 Control Profile

Guides on selecting the control profile, PROFIdrive or Danfoss FC, affecting control and status words.

4.4 PROFIdrive Control Profile

4.4.1 Control Word According to PROFIdrive Profile (CTW)

4.4.2 Status Word According to PROFIdrive Profile (STW)

4.5 Danfoss FC Control Profile

4.5.1 Control Word According to FC Profile (CTW)

4.5.2 Status Word According to FC Profile (STW)

5 Parameter Access

5.1 Parameter Access in General

Covers general methods for accessing frequency converter parameters from PLCs or HMI equipment.

5.1.3 PROFIBUS DP-V1

Introduces PROFIBUS DP-V1 for acyclic communication, enabling parameter value reading and writing.

5.1.4 PROFIBUS DP VO/PCV Channel

Explains parameter access via the PCV channel, part of PPO types for cyclic data exchange.

5.2 DP-V1 Parameter Access

Guides on using DP-V1 for acyclic communication with PROFIBUS masters class 1 and 2.

5.2.1 PROFIBUS DP-V1 Introduction

Introduces DP-V1 extension for acyclic communication, enabling parameter access beyond DP-V0.

5.2.6 DP-V1 Features for Parameter Access

Describes how to use DP-V1 for accessing frequency converter parameters via the PROFIdrive parameter channel.

5.2.7 DP-V1 Read/Write Services

Lists DP-V1 command/response headers and their attributes for parameter access.

5.2.8 DP-V1 Acyclic Parameter Channel

Details the PROFIdrive parameter channel for reading/writing parameter values and attributes.

5.2.9 Request/Response Attributes

Overviews possible attributes of the PROFIdrive parameter channel for data access.

5.3 PCV Parameter Access

Details using the PCV channel for parameter access and status retrieval.

5.4 PROFIBUS DP Parameter and Data Type

5.4.1 Parameter Description

5.4.2 Size Attribute

5.4.3 Object and Data Types Supported

5.4.4 Standardized Value

8 Troubleshooting

8.1 Diagnosis

Explains how VLT® PROFIBUS DP MCA 101 facilitates slave diagnosis through diagnosis messages.

8.2 No Response to Control Signals

Guides on troubleshooting lack of response to control signals by checking control word validity and terminal I/Os.

8.3 Warnings and Alarms

Lists and explains warning and alarm types, including their hex format and corresponding parameters.

8.4 Fault Messages via DP Diagnosis

Describes how standard DP diagnosis features provide online diagnosis during initialization and data exchange.

8.5 Extended Diagnosis

Details receiving extended diagnosis, alarm, and warning information based on trigger settings.