Omron PRT1-COM Operation Manual
Cat. No. W900--E2--1
PRT1-COM & GT1 Series
PROFIBUS-DP
MULTIPLE I/O TERMINAL
PRT1-COM
GT1 Series
PROFIBUS-DP
MULTIPLE I/O TERMINAL
Operation Manual
Produced December 1999
iv
Notice:
OMRON products are manufactured for use according to proper procedures by a qualified operator
and only for the purposes described in this manual.
The following conventions are used to indicate and classify precautions in this manual. Always heed
the information provided with them. Failure to heed precautions can result in injury to people or
damage to property.
DANGER
!
WARNING
!
Caution
!
Indicates an imminently hazardous situation which, if not avoided, will result in death or
serious injury.
Indicates a potentially hazardous situation which, if not avoided, could result in death or
serious injury.
Indicates a potentially hazardous situation which, if not avoided, may result in minor or
moderate injury, or property damage.
OMRON Product References
All OMRON products are capitalized in this manual. The word “Unit” is also capitalized when it refers
to an OMRON product, regardless of whether or not it appears in the proper name of the product.
The abbreviation “Ch,” which appears in some displays and on some OMRON products, often means
“word” and is abbreviated “Wd” in documentation in this sense.
The abbreviation “PC” means Programmable Controller and is not used as an abbreviation for
anything else.
Visual Aids
The following headings appear in the left column of the manual to help you locate different types of
information.
Indicates information of particular interest for efficient and convenient operation
Note
of the product.
1, 2, 3... 1. Indicates lists of one sort or another, such as procedures, checklists, etc.
Trademarks and Copyrights
Motorola is a registered trademark of Motorola, Inc.
Intel is a registered trademark of Intel, Inc.
OMRON, 1999
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any
form, or by any means, mechanical, electronic, photocopying, recording, or otherwise, without the prior written permission of OMRON.
No patent liability is assumed with respect to the use of the information contained herein. Moreover, because OMRON is
constantly striving to improve its high-quality products, the information contained in this manual is subject to change
without notice. Every precaution has been taken in the preparation of this manual. Nevertheless, OMRON assumes no
responsibility for errors or omissions. Neither is any liability assumed for damages resulting from the use of the information contained in this publication.
v
vi
TABLE OF CONTENTS
PRECAUTIONS xi
1 Intended Audience xii...........................................................
2 General Precautions xii..........................................................
3 Safety Precautions xii...........................................................
4 Operating Environment Precautions xii.............................................
5 Application Precautions xiii.......................................................
6 EC Directives xv...............................................................
......................................................
SECTION 1
PROFIBUS-DP 1
1-1 Introduction 2............................................................
1-2 Protocol architecture 3......................................................
1-3 Device types 4............................................................
1-4 PROFIBUS-DP characteristics 5..............................................
1-5 Device Data Base files 8....................................................
1-6 Profiles 9................................................................
........................................................
SECTION 2
Installation of PROFIBUS-DP Network 11..............
2-1 PROFIBUS-DP MULTIPLE I/O TERMINAL 12..................................
2-2 Communication Unit PRT1-COM 13...........................................
2-3 Setting up a PROFIBUS-DP network 18.........................................
SECTION 3
MULTIPLE I/O TERMINAL 23.......................
3-1 MULTIPLE I/O TERMINAL 24...............................................
3-2 Functions 29..............................................................
SECTION 4
Hardware Setup and Operational Check 37.............
4-1 Basic Procedure 38.........................................................
4-2 Specific Example 39........................................................
SECTION 5
Sample Programs 43.................................
5-1 Examples of Counter Unit Operation 44.........................................
SECTION 6
Basic I /O Unit Specifications 51.......................
6-1 Common Specifications for Basic I/O Units 52....................................
6-2 Transistor Input Units 54.....................................................
6-3 Transistor Output Units 74....................................................
6-4 Relay Output Units 97.......................................................
SECTION 7
Special I/O Unit Specifications 103......................
7-1 Analog Input Units 104.......................................................
7-2 Analog Output Units 120......................................................
7-3 Counter Units 134...........................................................
vii
TABLE OF CONTENTS
SECTION 8
Communications Timing 151...........................
8-1 Remote I/O Communications Characteristics 152...................................
SECTION 9
Troubleshooting and Maintenance 157...................
9-1 Normal Indication 158........................................................
9-2 Troubleshooting 159.........................................................
9-3 Maintenance 164............................................................
Appendices
A GSD file for PRT1-COM 167.....................................................
B Connectible Devices 171.........................................................
Index 175...........................................
Revision History 177..................................
viii
About this Manual:
This manual describes the installation and operation of the PROFIBUS-DP MULTIPLE I/O TERMINAL. A
modular system of I/O units (GT1 Series) connected by a communication unit (PRT1-COM) to
PROFIBUS-DP. The manual includes the sections described below.
Please read this manual carefully and be sure you understand the information provided before
attempt-ing to install and operate the PROFIBUS-DP Communication Unit and Multiple I/O units.
to read the precautions provided in the following section.
Section 1 gives a brief description of PROFIBUS-DP.
Section 2 describes the specification and installation of the PRT1-COM in a PROFIBUS-DP Network.
Section 3 provides an overview of the MULTIPLE I/O TERMINAL, including its features and functions.
Section 4 provides the basic procedure for operation and includes an actual example.
Section 5 provides some examples of programs used with the Counter Unit.
Section 6 provides the specifications for the basic I/O Units, the transistor Input and Output Units, and
Relay Output Units.
Section 7 provides the specifications for Special I/O Units, including the Analog Input and Output Unit,
and the Counter Unit.
Section 8 provides characteristics for communications by the PROFIBUS-DP Communication unit and
describes how to calculate the times required for communication between the various I/O units.
Section 9 describes the troubleshooting procedures and maintenance operations.
Appendix A provides a listing of the PRT1-COM GSD file.
Appendix B provides an overview of connectable devices.
Be sure
!
WARNING
Failure to read and understand the information provided in this manual may result in
personal injury or death, damage to the product, or product failure. Please read each
section in its entirety and be sure you understand the information provided in the section
and related sections before attempting any of the procedures or operations given.
ix
x
PRECAUTIONS
This section provides general precautions for using the Programmable Controller (PC) Systems and related devices.
The information contained in this section is important for the safe and reliable application of PC Systems. You must
read this section and understand the information contained before attempting to set up or operate a PC System.
1 Intended Audience xii...........................................................
2 General Precautions xii..........................................................
3 Safety Precautions xii...........................................................
4 Operating Environment Precautions xii.............................................
5 Application Precautions xiii.......................................................
6 EC Directives xv...............................................................
xi
1 Intended Audience
This manual is intended for the following personnel, who must also have
knowledge of electrical systems (an electrical engineer or the equivalent):
• Personnel in charge of installing FA systems.
• Personnel in charge of designing FA systems.
• Personnel in charge of managing FA systems and facilities.
2 General Precautions
This manual provides information for programming and operating OMRON PC
Systems. Be sure to read this manual before attempting to use the software and
keep this manual close at hand for reference during operation.
The user must operate the product according to the performance specifications
described in the operation manuals.
Before using the product under conditions which are not described in the manual
or applying the product to nuclear control systems, railroad systems, aviation
systems, vehicles, combustion systems, medical equipment, amusement
machines, safety equipment, and other systems, machines, and equipment that
may have a serious influence on lives and property if used improperly, consult
your OMRON representative.
Make sure that the ratings and performance characteristics of the product are
sufficient for the systems, machines, and equipment, and be sure to provide the
systems, machines, and equipment with double safety mechanisms.
4Operating Environment Precautions
WARNING
!
It is extremely important that a PC System and all PC Units be used for the
specified purpose and under the specified conditions, especially in applications
that can directly or indirectly affect human life. You must consult with your
OMRON representative before applying a PC System to the above mentioned
applications.
3 Safety Precautions
WARNING
!
WARNING
!
Never attempt to disassemble any Units while power is being supplied. Doing so
may result in serious electrical shock or electrocution.
Never touch any of the terminals while power is being supplied. Doing so may
result in serious electrical shock or electrocution.
4 Operating Environment Precautions
Do not operate the control system in the following places:
• Locations subject to direct sunlight.
• Locations subject to temperatures or humidity outside the range specified in
the specifications.
• Locations subject to condensation as the result of severe changes in
temperature.
• Locations subject to corrosive or flammable gases.
• Locations subject to dust (especially iron dust) or salts.
• Locations subject to shock or vibration.
• Locations subject to exposure to water, oil, or chemicals.
xii
• Take appropriate and sufficient countermeasures when installing systems in
the following locations:
• Locations subject to static electricity or other forms of electrical
interference.
• Locations subject to strong electromagnetic fields.
• Locations subject to possible exposure to radioactivity.
• Locations close to power supplies.
5Application Precautions
Caution
!
The operating environment of the PC System can have a large effect on the
longevity and reliability of the system. Improper operating environments can
lead to malfunction, failure, and other unforeseeable problems with the PC
System. Be sure that the operating environment is within the specified
conditions at installation and remains within the specified conditions during the
life of the system.
5 Application Precautions
Observe the following precautions when using the MULTIPLE I/O TERMINAL.
WARNING
!
Failure to abide by the following precautions could lead to serious or possibly
fatal injury. Always heed these precautions.
• Always ground the system to 100 Ω or less when installing the system to
protect against electrical shock.
• Always turn OFF the power supply to the system before attempting any of the
following. Performing any of the following with the power supply turned ON
may lead to electrical shock:
• Mounting or removing any Units (e.g., I/O Units, CPU Unit, etc.) or memory
cassettes.
• Assembling any devices or racks.
• Connecting or disconnecting any cables, connectors, or wiring.
Caution
!
Failure to abide by the following precautions could lead to faulty operation of or
damage to the MULTIPLE I/O TERMINAL. Always heed these precautions.
• Use the Units only with the power supplies and voltages specified in the
operation manuals. Other power supplies and voltages may damage the
Units.
• Take measures to stabilize the power supply to conform to the rated supply if it
is not stable.
• Provide circuit breakers and other safety measures to provide protection
against shorts in external wiring.
• Do not apply voltages exceeding the rated input voltage to Input Units. The
Input Units may be destroyed.
• Do not apply voltages exceeding the maximum switching capacity to Output
Units. The Output Units may be destroyed.
• Install all Units according to instructions in the operation manuals. Improper
installation may cause faulty operation.
• Be sure to tighten Backplane screws, terminal screws, and cable connector
screws securely.
• Do not attempt to take any Units apart, to repair any Units, or to modify any
Units in any way.
• Do not use communications cables or I/O cables in parallel to or close to
high-tension, high-rate current carrying lines. Doing so may cause faulty
operation
xiii
• Be sure to install the MULTIPLE I/O TERMINAL in the proper direction. Not
doing so may cause faulty operation.
• When attaching Units to the DIN rail, be sure to attach them securely. Not doing
so may cause the Units to be damaged.
• Use this product within the specified ranges for communications distances and
connection distances. Not doing so may lead to faulty operation.
• Use the specified cables when making communications connections. Not
doing so may cause faulty operation.
• Be sure to wire the communications paths, the communications power
supplies, the internal power supplies, and the I/O power supplies correctly.
Use voltages for the power supplies that are within the specified ranges. Not
doing so may cause malfunction.
• Do not, under any circumstances, use this product with loads exceeding the
contact rating values. Doing so may cause deterioration of insulation and
damage.
• The life-expectancy of the relays depends greatly on the switching conditions.
Before practical use of the product, perform a trial operation of the product in
the actual conditions in which it will be used. Use the product at a switching
frequency that will allow efficient operation. Continued use of the product in
conditions causing reduced efficiency will cause deterioration of insulation and
damage.
5Application Precautions
• Connection Cables
• Before switching ON power supplies, check that the connectors are
mounted securely.
• Check that the connectors for the I/O Unit interfaces are securely locked.
• Tightening Torques
Check that all the screws for the Units are tightened to the correct torque. Not
doing so may cause faulty operation.
• Internal power supplies, I/O power supplies, terminal screws:
0.3to0.5NS m
• Communications cable, communications connector screws:
0.25 to 0.35 N S m
• High-density I/O Unit connector screws: 0.25 to 0.35 N S m
• Cleaning
• Do not used thinner-based products for cleaning. Doing so may dissolve
attachment areas or cause discoloration.
• Power Supply
• Use separate power supplies for communications power supplies, internal
power supplies, I/O power supplies, load power supplies, and encoder
power supplies. Not doing so may lead to faulty operation.
Caution
!
The following precautions are necessary to ensure the general safety of the
system. Always heed these precautions.
• Provide double safety mechanisms to handle incorrect signals that can be
• Provide external interlock circuits, limit circuits, and other safety circuits in
xiv
generated by broken signal lines or momentary power interruptions.
addition to any provided within the PC System to ensure safety.
6 EC Directives
The MULTIPLE I/O TERMINAL conforms to EMC and Low Voltage Directives as
follows:
EMC
Directives
OMRON devices that comply with EC Directives also conform to the related
EMC standards so that they can be more easily built into other devices or the
overall machine. The actual products have been checked for conformity to EMC
standards (see the following note). Whether the products conform to the
standards in the system used by the customer, however,must be checked by the
customer.
EMC-related performance of the OMRON devices that comply with EC
Directives will vary depending on the configuration, wiring, and other conditions
of the equipment or control panel on which the OMRON devices are installed.
The customer must, therefore, perform the final check to confirm that devices
and the overall machine conform to EMC standards.
Low Voltage
Always ensure that devices (Relay Units) operating at voltages of 50 to
1,000 VAC and 75 to 1,500 VDC meet the required safety standards (IEC255).
The MULTIPLE I/O TERMINALS that comply with EC Directives must be
installed as follows:
Directive
6EC Directives
1, 2, 3... 1. MULTIPLE I/O TERMINALS are designed for installation inside control
panels. All MULTIPLE I/O TERMINALS must be installed within control
panels.
2. Used reinforced insulation or double insulation for the DC power supplies
used for the communications power supply, internal circuit power supply,
and the I/O power supplies.
3. MULTIPLE I/O TERMINAL products that meet EC Directives also meet the
Common Emission Standard (EN50081-2). However, radiated emission (at
10 m) will vary with the overall configuration of the control panel, other
devices connected to the control panel, and other conditions. You must
therefore confirm that EC Directives are satisfied for the overall machine or
device.
xv
This section gives a brief description of PROFIBUS-DP.
1-1 Introduction 2............................................................
1-2 Protocol architecture 3......................................................
1-3 Device types 4............................................................
1-4 PROFIBUS-DP characteristics 5..............................................
1-4-1 Bus Access Protocol 5...............................................
1-4-2 Data throughput 6..................................................
1-4-3 Diagnostics functions 6..............................................
1-4-4 Protection mechanisms 7.............................................
1-4-5 Network states 7...................................................
1-5 Device Data Base files 8....................................................
1-6 Profiles 9................................................................
SECTION 1
PROFIBUS-DP
1
1-1 Introduction
1-1SectionIntroduction
Standard EN50170-2
High speed
Process Automation
Higher level
Uniform bus access
protocol
PROFIBUS (
standard for a wide range of applications in manufacturing, process and building
automation. Vendor independence and openness are guaranteed by the
PROFIBUS standard EN50170-2. With PROFIBUS, devices of different
manufacturers can communicate without special interface adjustments.
The PROFIBUS family consists of three compatible versions:
PROFIBUS-DP
stands forDecentralisedPeriphery. It is optimised for high speed and
DP
low-cost interfacing, especially designed for communication between
automation control systems and distributed I/O at the device level.
PROFIBUS-PA
stands forProcessAutomation. It permits sensors and actuators to be
PA
connected on one common bus line even in intrinsically-safe areas. It permits
data communication and power supply over the bus using 2-wire technology
according to the international standard IEC 1158-2.
PROFIBUS-FMS
stands forFieldbusMessageSpecification. This version is the
FMS
general-purpose solution for communication tasks at a higher level. Powerful
services open up a wide range of applications and provide great flexibility. It can
also be used for extensive and complex communications tasks.
PROFIBUS-DP and PROFIBUS-FMS use the same transmission technology
and a uniform bus access protocol. Thus, both versions can be operated
simultaneously on the same cable. However, FMS field devices cannot be
controlled by DP masters or vice versa.
cessField
Pro
) is a vendor-independent, open fieldbus
Bus
Caution
!
It is not possible to exchange one of these family members by another family
member. This will cause faulty operation.
The remainder of this Operation Manual only describes PROFIBUS-DP.
2
1-2 Protocol architecture
NOTDEFINE
D
1-2SectionProtocol architecture
OSI
Layer 1, 2 and user
interface
The PROFIBUS-DP protocol architecture is oriented on the Open System
Interconnection (OSI) reference model in accordance with the international
standard ISO 7498.
DP-Profiles
DP-Extensions
User Interface Layer DP Basic Functions
(7) Application Layer
(6) Presentation Layer
(5) Session Layer
(4) Transport Layer
(3) Network Layer
(2) Data Link Layer Fieldbus Data Link (FDL)
(1) Physical Layer RS-485 / Fibre Optics
OSI layer model of PROFIBUS-DP
PROFIBUS-DP uses layers 1 and 2, and the user interface. Layers 3 to 7 are not
defined.
Layer 1 (physical layer) defines the physical transmission characteristics.
Layer 2 (data link layer) defines the bus access protocol.
This streamlined architecture ensures fast and efficient data transmission. The
application functions which are available to the user, as well as the system and
device behaviour of the various PROFIBUS-DP device types, are specified in
the user interface.
NOT DEFINED
Transmission medium
Easy installation
Cable length
RS-485 transmission technology or fibre optics are defined as transmission
medium. RS-485 transmission is the most frequently used transmission
technology. Its application area includes all areas in which high transmission
speed and simple inexpensive installation are required. Twisted pair shielded
copper cable with one conductor pair is used.
The RS-485 transmission technology is very easy to handle. Installation of the
twisted pair cable does not require expert knowledge. The bus structure permits
addition and removal of stations or step-by-step commissioning of the system
without influencing the other stations. Later expansions have no effect on
stations which are already in operation.
Various transmission speeds between 9.6 kbit/s and 12 Mbit/s can be selected.
One unique transmission speed is selected for all devices on the bus when the
system is commissioned.
The maximum cable length depends on the transmission speed (see section
2-3-1). The length can be increased by the use of repeaters. The use of more
than 3 repeaters in series is not recommended.
3
1-3 Device types
1-3SectionDevice types
PROFIBUS-DP distinguishes between master devices and slave devices.
Master devices
DPM1, DPM2
Slave devices
Master devices control the data communication on the bus. PROFIBUS-DP
allows more then one master in the network. A master can send messages
without an external request, as long as it holds the bus access right (the token).
Masters are also called active stations in the PROFIBUS-DP standard.
There are two types of master devices: DP master class 1 (DPM1) and DP
master class 2 (DPM2).
A DPM1 is a central controller, which exchanges information with the
decentralised stations (i.e. DP slaves) within a specified message cycle.
DPM2 devices are programmers, configuration devices or operator panels.
They are used during commissioning for configuration of the DP system or for
operation and monitoring purposes.
Slave devices are peripheral devices. Typical slave devices include input/output
devices, valves, drives and measuring transmitters. They do not have bus
access rights and they can only acknowledge received messages or send
messages to the master when requested to do so. Slaves are also called
passive stations.
The PRT1-COM is a modular slave device.
4
1-4 PROFIBUS-DP characteristics
1-4-1 Bus Access Protocol
1-4SectionPROFIBUS-DP characteristics
Layer 2
Medium Access Control
T oken passing
Polling procedure
The bus access protocol is defined by layer 2. This protocol also includes data
security and the handling of the transmission protocols and messages.
The Medium Access Control (MAC) specifies the procedures, which determine
when a station is permitted to transmit data. A token passing procedure is used
to handle the bus access between master devices, and a polling procedure is
used to handle the communication between a master device and its assigned
slave device(s).
The token passing procedure guarantees that the bus access right (the token) is
assigned to each master within a precisely defined time frame. The token
message, a special message for passing access rights from one master to the
next master, must be passed around the logical token ring - once to each master
- within a specified target rotation time.
The polling or master-slave procedure permits the master, which currently owns
the token, to access its assigned slaves. The picture below shows a possible
configuration.
Token passing and Slave polling mechanisms
The configuration shows three active stations (masters) and six passive stations
(slaves).
The three masters form a logical token ring. When an active station receives the
token message, it can perform its master role for a certain period of time. During
this time it can communicate with all assigned slave stations in a master-slave
communication relationship. In addition a DPM2 master can take the initiative to
communicate with DPM1 master stations in a master-master communication
relationship.
Multi-peer
communication
In addition to logical peer-to-peer data transmission, PROFIBUS-DP provides
multi-peer communication (broadcast and multicast).
Broadcast communication: an active station sends an unacknowledged
Multicast communication: an active station sends an unacknowledged
message to all other stations (master and slaves).
message to a predetermined group of stations
(master and slaves).
5
1-4-2 Data throughput
1-4SectionPROFIBUS-DP characteristics
Transmission time
At 12 Mbit/s, PROFIBUS-DP requires approximately 1 ms for the transmission
of 512 bits of input data and 512 bits of output data distributed over 32 stations.
The figure below shows the typical PROFIBUS-DP transmission time
depending on the number of stations and the transmission speed. The data
throughput will decrease when more than one master is used.
Bus cycle time vs number of slaves
Conditions: Each slave has 2 bytes of input data and 2 bytes of output data.
1-4-3 Diagnostics functions
Extensive diagnostics
Device related
diagnostics
Module related
diagnostics
Channel related
diagnostics
The extensive diagnostic functions of PROFIBUS-DP enable fast location of
faults. The diagnostic messages are transmitted over the bus and collected at
the master. These messages are divided into three levels:
• Device related diagnostics
This diagnostic level concerns the general operational status of the whole
device (e.g. overtemperature or low voltage).
• Module related diagnostics
This diagnostic level indicates that a fault is present in a specific I/O range
(e.g. an 8-bit output module) of a station.
• Channel related diagnostics
This diagnostic level indicates an error at an individual input or output (e.g.
short circuit on output 5).
6
1-4-4 Protection mechanisms
1-4SectionDevice types
Time monitoring
At the master
At the slave
PROFIBUS-DP provides effective protection functions against
parameterisation errors or failure of the transmission equipment. Time
monitoring is provided at the DP master and at the DP slaves. The monitoring
interval is specified during the configuration.
• Protection mechanism at the master.
The DPM1 master monitors data transmission of its active slaves with the
Data_Control_Timer. A separate control timer is used for each slave. This
timer expires, when correct data transmission does not occur within the
monitoring interval.
If the master’s Auto_Clear Mode has been enabled, the DPM1 will exit its
Operate state, switches the outputs of all assigned slaves to fail-safe status
and changes to its Clear status (see also section 1-4-5).
• Protection mechanisms at the slave.
The slave uses the watchdog control to detect failures of the master or the
transmission line. If no data communication with the master occurs within the
watchdog control interval, the slave automatically switches its outputs to the
fail-safe status. This mechanism can be enabled or disabled for each
individual slave.
Also, access protection is available for the inputs and outputs of the DP
slaves operating in multi-master systems. This ensures that direct access
can only be performed by the authorised master. For all other masters, the
slaves offer an image of their inputs and outputs, which can be read from any
master, even without access rights.
1-4-5 Network states
Off-line
Stop
Clear
Operate
Auto_clear
PROFIBUS-DP distinguishes four different network states.
• Off-line
Communication between all PROFIBUS-DP devices on a network is
stopped.
• Stop
Communication between DPM1 and DP slaves is stopped. Only
communication between DPM1 and DPM2 is possible.
• Clear
DPM1 master attempts to set parameters, check the configuration, and
subsequently perform data exchange with its associated DP-slaves. The
data exchange comprises reading the inputs of the DP-slaves and writing
zeros to the outputs of the DP-slaves.
• Operate
DPM1 master exchanges data with its assigned slaves, inputs are read and
outputs are written. Beside this, the DPM1 cyclically sends its local status to
all assigned DP slaves (using a multicast message) at a configurable time
interval.
When an error occurs during the data exchange phase of the DPM1, the
’Auto_clear’ configuration parameter determines the subsequent actions. If this
parameter is set to false, the DPM1 remains in the Operate state. If set to true,
the DPM1 switches the outputs of all assigned DP slaves to the fail-safe state
and the network state changes to the Clear state.
7
1-5 Device Data Base files
1-5SectionDevice Data Base files
Plug-and-play
DDB-file, GSD-file
General section
DP-master section
DP-slave section
Configurator
To achieve simple plug-and-play configuration of the PROFIBUS-DP network,
the characteristic features of a device are specified in a file. This file is called a
DDB-file (Device Data Base file) or a GSD-file (Gerätestammdaten file). The
GSD files are prepared individually by the vendor for each type of device,
according a fixed format. Some parameters are mandatory, some have a default
value and some are optional.
The device data base file is divided into three parts:
• General specifications
This section contains vendor and device names, hardware and software
release versions, station type and identification number, protocol
specification and the baud rates supported.
• DP master-related specifications
This section contains all parameters, which only apply to DP master devices
(e.g. maximum memory size for master parameter set, maximum number of
entries in the list of active stations or the maximum number of slaves the
master can handle).
• DP slave-related specifications
This section contains all specifications related to slaves (e.g. minimum time
between two slave poll cycles, specification of the inputs and outputs and
consistency of the I/O data).
The device data base file of each device is loaded in the configurator and
downloaded to the master device.
Refer to the Operation Manual of the PROFIBUS-DP Master Unit (W349) for
usage of the GSD file in the master’s configuration software.
8
1-6 Profiles
1-6SectionProfiles
Exchanging devices
To enable the exchange of devices from different vendors, the user data has to
have the same format. The PROFIBUS-DP protocol does not define the format
of user data, it is only responsible for the transmission of this data.
The format of user data may be defined in so called profiles. Profiles can reduce
engineering costs since the meaning of application-related parameters is
specified precisely. Profiles have been defined for specific areas like drive
technology, encoders, and for sensors / actuators.
9
Installation of PROFIBUS-DP Network
This section describes the installation of the PRT1-COM within the PROFIBUS-DP Network
2-1 PROFIBUS-DP MULTIPLE IO TERMINAL 12..................................
2-2 Communication Unit PRT1-COM 13...........................................
2-2-1 Specification of PRT1-COM 13........................................
2-2-2 PRT1-COM Components 14...........................................
2-3 Setting up a PROFIBUS-DP network 18.........................................
2-3-1 Fieldbus cabling 18..................................................
2-3-2 Configuring PROFIBUS-DP system 20..................................
SECTION 2
11
2-1 PROFIBUS-DP MULTIPLE I/O TERMINAL
The PROFIBUS-DP MULTIPLE I/O TERMINAL is a system with a
communication Unit and various MULTIPLE I/O Units.
The communication Unit (PRT1-COM) connects the MULTIPLE I/O Units to the
PROFIBUS-DP Network. A maximum of eight MULTIPLE I/O Units can be
connected to one PRT1-COM.
The PRT1-COM Unit is described in this section, the total MULTIPLE I/O
TERMINAL system is described in the next section.
2-1SectionPROFIBUS-DP M ULTIPLE I/O TERMINAL
12
2-2 Communication Unit PRT1-COM
p
2-2-1 Specification of PRT1-COM
Item Specification
Model PRT1-COM
Internal power
supply
I/O Unit
interface
Noise immunity 1,500 V p-p Pulse width: 0.1 to 1 ms, Pulse rise
Vibration resistance 10 to 150 Hz, 1.0-mm double amplitude or 70
Shock resistance 200 m/s
Dielectric strength 500 VAC (between isolated circuits)
Ambient temperature -10 °Cto55°C
Ambient humidity 25% to 85% (with no condensation)
Operating atmosphere No corrosive gases
Storage temperature -25 °Cto65°C
EMC directives EN50081-2, EN50082-2
Mounting DIN 35-mm rail
Mounting strength 100 N
Terminal strength 100 N
I/O Unit interface connector lock
strength
Weight Approx. 165 g
Voltage range 24VDC +10% - 15% (20.4 to 26.4 VDC)
Unit current
consumption
Maximum
current
Inrush current 30 A max.
Number of
Units
connected
Total number
of inputs /
outputs
Rated output
Current
Overcurrent
Protection
function.
2-2SectionCommunication Unit PRT1-COM
0.18 A max. (at 24 VDC)
0.6 A (with maximum output to I/O Unit) the
capacity required for the internal power supply of
the Communication Unit can be obtained using
the following formula: Communication Unit
internal power supply current = Communication
Unit internal current consumption + total current
Consumption for the I/O Unit interfaces.
8Unitsmax.
Total inputs (IN): 128 bytes max.
Total outputs (OUT): 128 bytes max.
0.3 A max.
105% of rated current or higher. When an
over-current occurs, the power supply to the I/O
Units will remain OFF until the PRT1-COM power
supply is turned OFF and ON again.
time: 1 ns (via noise simulator)
2
m/s
2
50 N
13
Characteristics of
PROFIBUS-DP
Applicable standard EN 50170 vol. 2
Type PROFIBUS-DP SLAVE
Bus connector 9-pin sub-D female
Bus termination Not included
Baud rates
(Auto--detect)
PROFIBUS address range 0to125
Communication cable Type A (EN 50170-2)
Minimum slave interval time 1ms
Input data 4 status bytes + max. 128 data bytes
Output data max. 128 data bytes
Supported PROFIBUS-DP functions
9.6 k, 19.2 k, 45.45 k, 93.75 k, 187.5 k,
500 k, 1.5 M, 3 M, 6 M, 12 M bits/s
• Data_Exchange
• Slave_Diag
• Set_Prm
• Chk_Cfg
• Global Control
(SYNC, FREEZE, CLEAR)
• Get_Cfg
• RD_Inp
• RD_Outp
PROFIBUS-DP GSD file OC_047D.GSD
2-2SectionCommunication Unit PRT1-COM
This product has been tested in the test laboratory of PNO (PROFIBUS
Note
Nutzerorganisation) and has been approved as conforming to the
PROFIBUS-DP standard. (EN 50170-2)
2-2-2 PRT1-COM Components
The following overview shows the various components of PRT1-COM.
PROFIBUS-DP
Communication connector
Power Terminals
LED Indicators
MULTIPLE I/O Unit
Interface connector
DIP Switches
Power Terminals
MULTIPLE I/O Unit
Connect to the power supply for operation and connect to the functional earth.
Connects to the MULTIPLE I/O Unit communication cable.
interface
14
2-2SectionCommunication Unit PRT1-COM
(multipleI/O
)
Led Indicators
PRT1-COM has 3 LEDs to indicate the status of the Unit.
1. The Unit specific status is indicated with the US-LED
2. The BF-LED indicates the status of PROFIBUS-DP
3. The MULTIPLE I/O Bus status is indicated with the TS-LED
US LED Colour Description
Unit Status Bicolor
BF LED Color Description
Bus Failure
(Profibus-DP)
TS LED Color Description
Terminal
Status
Green / Red
Red
Bicolor
Green / Red
OFF PWR not OK
Green ON Unit OK
Green BLINK Initialising
Red ON Unit error
OFF No errors
ON
OFF Power overload
Green ON Communication OK
Green BLINK Special I/O Unit Error
Red ON
S Response monitoring time has
elapsed. The master did not
address PRT1-COM within
the configured watchdog time.
S PRT1-COM was not
parameterised or not properly
configured on start-up.
S Bus error
S Configuration error
S End station error
S Max. I/O Unit over
S Basic I/O Unit Error
DIP Switch Settings
Switch Name Purpose
1to7 ADDRESS PROFIBUS-DP station address
All OFF = station address 0, (default, see Note)
All ON = station address 127
8 SYNC Data exchange method: Synchronous /
Asynchronous
OFF = Asynchronous, (default)
ON = Synchronous
9 INTEL Double byte transfer method:
INTEL / Motorola
OFF = Motorola, (default)
ON = Intel
10 NC Reserved for system use.
Always off
PROFIBUS-DP address setting is default set to 0.
15
2-2SectionCommunication Unit PRT1-COM
– This setting should always be changed to appropriate value.
– Station addresses 126 and 127 are invalid and should not be used.
-- Do not use station address 0 in combination with the C200HW-PRM21
PROFIBUS-DP Master.
Data exchange method
Double byte transfer
method
1. Asynchronous mode:
The MULTIPLE I/O Bus transmit/receive cycles are independent of the
messages being transmitted/received at the PROFIBUS-DP interface.
2. Synchronous mode:
A MULTIPLE I/O Bus transmit/receive cycle will only be initiated if new data
has been received at the PROFIBUS-DP interface.
More information can be found in: section 8-1-4.
Synchronous mode has no meaning when only input MULTIPLE I/O Units are
Note
attached. In this case the switch setting is ignored and asynchronous mode is
used.
The INTEL switch is used for selection of the little-endian/big-endian mode, to
define the transfer method for double-byte data transfer between
PROFIBUS-DP and MULTIPLE I/O Bus.
This allows for adjustment of the data format if required by the PROFIBUS-DP
master.
1. Big-endian mode (Often referred to as Motorola mode):
The first byte transmitted over PROFIBUS-DP is the most-significant byte
whereas the second byte is the least-significant byte.
MULTIPLE I/O Bus
PROFIBUS-DP message
Mounting
I/O Unit Bus Connectors
16
2. Little-endian mode (Often referred to as Intel mode):
The first byte transmitted over PROFIBUS-DP is the least-significant byte
whereas the second byte is the most-significant byte.
MULTIPLE I/O Bus PROFIBUS-DP message
Changing the transfer method to ’Little-endian’ mode will also have impact on
Note
the transfer of the status bytes, see also section 3-2-4.
Mount the Unit on DIN 35-mm rail using the DIN Track Mounting Hook.
The I/O Unit Bus connectors on the MULTIPLE I/O Units must be connected with
the appropriate cables to provide I/O Unit interface and allow power to be
supplied to the I/O Units.
An End connector cable must be connected to the right-side connector of the last
I/O Unit (terminator).
2-2SectionCommunication Unit PRT1-COM
One I/O Unit connecting cable (cable length 40 mm) is included with each I/O
Unit. One End connector is supplied with the Communication Unit. An I/O Unit
connecting cable with a cable length of 1 m (GCN1-100) is sold separately.
Connect the I/O Unit connecting cable to the right connector on the
Communication Unit and to the left connector of the I/O Unit as shown in the
following figure.
Wiring
I/O Unit Connecting Cable
(included with the I/O Unit)
End connector
(included with the
Communication Unit)
Be sure to connect the End connector to the right I/O Unit Bus connector of the
last I/O Unit.
Provide the internal power supply as shown in the following diagram.
Dimensions
Side view Front view
is connected to the shield of the PROFIBUS-DP connector.
17
Loading...