USE FOR THE INTENDED PURPOSEUSE FOR THE INTENDED PURPOSE
USE FOR THE INTENDED PURPOSE
USE FOR THE INTENDED PURPOSEUSE FOR THE INTENDED PURPOSE
GENERAL SAFETY INSTRUCTIONSGENERAL SAFETY INSTRUCTIONS
GENERAL SAFETY INSTRUCTIONS
GENERAL SAFETY INSTRUCTIONSGENERAL SAFETY INSTRUCTIONS
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
I/O Box TI/O Box T
I/O Box T
I/O Box TI/O Box T
PROFIBUS PROFIBUS
PROFIBUS
PROFIBUS PROFIBUS
GENERAL TECHNICAL DAGENERAL TECHNICAL DA
GENERAL TECHNICAL DA
GENERAL TECHNICAL DAGENERAL TECHNICAL DA
PROFIBUS PA CIRCUITPROFIBUS PA CIRCUIT
PROFIBUS PA CIRCUIT
PROFIBUS PA CIRCUITPROFIBUS PA CIRCUIT
INSTINST
INST
INSTINST
Measures to be taken before installationMeasures to be taken before installation
Measures to be taken before installation
Measures to be taken before installationMeasures to be taken before installation
Electrical connection of the I/O Box TElectrical connection of the I/O Box T
Electrical connection of the I/O Box T
Electrical connection of the I/O Box TElectrical connection of the I/O Box T
PROFIBUS PA circuitPROFIBUS PA circuit
PROFIBUS PA circuit
PROFIBUS PA circuitPROFIBUS PA circuit
CONFIGURACONFIGURA
CONFIGURA
CONFIGURACONFIGURA
Memory allocation for the effective data trafficMemory allocation for the effective data traffic
Memory allocation for the effective data traffic
Memory allocation for the effective data trafficMemory allocation for the effective data traffic
System parametersSystem parameters
In these Operating Instructions, the following symbols are used:
Indicates a work step which you must carry out.
ATTENTION!
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NOTE
Indicates information which must be followed. Failure to do
this could endanger your health or the functionality of the
device.
Indicates important additional information, tips and
recommendations.
1USE FOR THE INTENDED PURPOSE
I/O box type 8642 with PROFIBUS PA switching must only be
used for the usages set down in the General Description and only in
connection with external devices and components recommended or permitted
by Bürkert, such as the Namur sensors listed, and for correspondingly
permitted valves. Any other use is not considered the intended use.
Observe the instructions in this operating manual, as well as the conditions of
use and permissible data specified in the chapter
the I/O Box Type 8642 with PROFIBUS PA circuit"
safe operation of the system depends on professional transportation,
professional storage and installation, and careful operation and maintenance.
“General technical data for
The proper function and
4 - 8642
2GENERAL SAFETY INSTRUCTIONS
To ensure that the device functions correctly, and will have a long service life,
please comply with the information in these Operating Instructions, as well as
the application conditions and additional data given in the Type 8642 data sheet:
• When planning the application of the device, and during its operation,
observe the general technical rules!
• Work on the device should only be carried out by specialist staff using
suitable tools!
• Observe the valid accident prevention and safety regulations for electrical
equipment during the operation, maintenance and repair of the equipment!
• Always switch off the voltage supply before working on the system!
• Only use lines fitted with an earth line, and connect the earth!
• Take suitable measures to prevent unintentional operation or impermissible
impairment.
• If these instructions are ignored, or if inadmissible work is carried out on the
device, no liability will be accepted from our side, and the guarantee on the
device and accessory parts will become invalid!
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NOTE
For more detailed information regarding the commissioning of a
Profibus PA branch, we recommend the “PROFIBUS PA
Commissioning Handbook” of the PNO.
Protection against electrostatic damage
The device contains electronic components that
are sensitive to electrostatic charging (ESD).
These components are endangered by contact
with statically charged persons or objects. In the
worst case they are immediately destroyed or
fail after putting into operation. Observe the
requirements of EN 100 015 - 1 in order to
minimize or avoid the risk of damage by
ATTENTION!
CAUTION ON HANDLING!
COMPONENTS / MODULES
LIABLE TO ELECTROSTATIC
DAMAGE!
instantaneous electrostatic discharge. Make
sure also that you do not touch electronic
components when they are under supply
voltage.
8642 - 5
3GENERAL DESCRIPTION
I/O Box for driving process valves with 6520 and 6521 NAMUR type valves:
• Driving of four Type 6520/6521 valves (PTB No. Ex-97.D.2089x)
• Connection of two sensors per valve
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NOTE
The line resistance to the sensors and valves shall be not more
than 20 Ω for a max. cable length of 30 m.
The values of the capacity and inductance are specified in the
conformity certificate.
Use only shielded cable for connecting the sensors and valves.
Note also that the screening must be connected, e.g. at the front
panel of the housing.
6 - 8642
Permitted NAMUR sensors for the I/O box type 8642
Manufacturer: Pepperl & Fuchs
Sensor type: single, proximity
• De-central unit for efficient collaboration with a central automation equipment
(e.g., process control system)
• High process security due to bi-directional transmission of signals
-switching commands from process control system to valve
-sensor signals for registration of the valve position of the process valve.
• The device may be operated with the extended PROFIBUS DPCommunication (DPV1) in the cyclic and acyclic modes. The process values
are controlled via the cyclic data traffic, e.g. from a PLC. Configuration is
carried out from an operating device via the acyclic data traffic (e.g.
CommuWins SIMATIC PDM).
With regard to the parameters for the configuration and the process data
traffic, the “PROFIBUS PA
obligatory and optional parameters which are available in the unit are defined
in this document. The profile documentation can be obtained from the PNO
(PROFIBUS Utilisation Organisation).
Profile for Process Control Devices
3.2PROFIBUS PA
The PROFIBUS PA connects the automation system and the process control
system with the de-central field units. It uses the extended PROFIBUS DP
protocol in connection with the transmission technology according to IEC 1158-2.
PROFIBUS PA fulfils the special requirements of traffic technology, e.g., for the
chemical and petrochemical areas:
•
Uniform application profile for process automation and complete interoperability between various PROFIBUS PA devices.
•
Connection of the process automation with the PROFIBUS PA to the
general automation via the PROFIBUS DP using the transmission
technology to EIA RS 485 or optical waveguides
•
Remote supply and data transmission in two-wire technique with PROFIBUS PA
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” applies. The
•
Use of PROFIBUS PA within areas with danger of explosion with explosive
protection class Inherent Safety through application of transmission
technology to IEC 1158-2
•
Simple linking of the PROFIBUS DP and PROFIBUS PA bus segments by
means of segment couplers
8642 - 9
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In the same way as for operation outside areas with danger of explosion, work
can also be carried out within the Ex-area with PROFIBUS PA with “e”
protection Inherent Safety.
The planning of the non-inherently safe and inherently safe systems takes place
following the same open concept. Field units can be switched together with
various topologies, and be completely supplied via the bus. The units can also
be operated and be connected or disconnected during operation within the
explosion-risk area [1].
EN 50170 Volume 2 and DIN 19245 Parts 1 to 4
Device Profile
General
Automation
Manufacturing
Automation
Process
Automation
Branch Profile
PROFIBUS-FMS
universalbranch-oriented
- wide application range
- Multi-Master communication
Fig. 1: Profibus Family [1].
[1] PNO company: Commissioning Handbook for PROFIBUS PA, Version 1.1 of 22.09.96
PROFIBUS-DP
fast
- plug and play
- efficient and economical
PROFIBUS-PA
- bus supply
- intrinsically safe
10 - 8642
4GENERAL TECHNICAL DATA FOR THE I/O BOX TYPE
8642 WITH PROFIBUS PA CIRCUIT
Field bus interface according to IEC 1158-2
Communication device following the FISCO model
Permitted operating voltage:9 - 24 V
Permitted operating voltage, intrinsically safe:
referring to power supply device with
– trapezoidal characteristic curve9 - 15 V
– linear characteristic curve9 - 17,5 V
Operating current:16,5 mA ± 6%
Maximum current in case of a fault:< 22,5 mA
Max. permissible power of the power supply2 W
with intrisically safe bus supply
Permissible temperature range:- 25 to 60 °C
Climatic test:DIN IEC Part 2 - 38
exposure 10 cycles à 24 h
Insulation class:3
Protection class of housing:IP 65
(when using corresponding
screwed fittings)
Explosion protection toEN 50020 and EN 50014
II 2 (1) G EEx ia IIC T6
NOTEThe I/O Box Type 8642 fulfils the regulations of the EMC law:
Resistance to interferenceEN 50082-2
Transmitted interferenceEN 50081-2
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8642 - 11
5INSTALLATION AND COMMISSIONING
Î Work on the device should only be carried out by specialist staff using the
correct tools!
Î Note that lines and valves must not be unscrewed from systems that are
under pressure!
Î Preferred fitting position: Attachment screws pointing downwards!
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Î If EMV screwed fittings are used, position the screens according to
manufacturer’s instructions!
Î On using a Weidmüller plugged connector for Profibus PA, the following
configuration applies:
Positioning
dimensions
B
n.c.
View onto pin base and pins
PinColourPROFIBUS PA
AbluePASblackscreen
BbrownPA+
S
A
n.c.not connected
Î On the front panel threads to M20 and M16 are provided; on the side a
thread to M16.
Î Before interfering with the system, always switch off the voltage supply!
Î The terminals may only be removed when not under voltage!
ATTENTION!
The front panel is designed for a maximum of 5 changes.
The fixing screws of the front panel may be tightened with a
maximum of 1.5 Nm.
ATTENTION!
COUTION ON HANDLING!
ELECTROSTATICALLY
ENDANGERED COMPONENTS /
MODULES!
12 - 8642
5.1Measures to be taken before installation
Î Check the connections, voltage and operating pressure!
Î Ensure that the max. operating data (see name plate) is not exceeded!
ATTENTION!
This device complies with the European Community EMC
guideline No. 89/336/EWG. Observe the installation
instructions in order to fulfil the regulations of this guideline.
Connect the screw terminal TE (technical earth) to the earth
potential using a cable that is as short as possible, or take
suitable measures to prevent undesired electro-magnetic
interference affecting the device.
Connecting cable for TE (technical earth):
- minimal diameter: 2.5 mm
- maximum length: 30 cm
2
5.2Electrical connection of the I/O Box Type 8642 with
PROFIBUS PA circuit
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Fig. 2: I/O Box Type 8642 with PROFIBUS PA circuit
8642 - 13
5.2.1 Connections
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Fig. 3: Connection diagram of the I/O Box type 8642
Terminal connections
• Terminals A and E:
Connection for the PROFIBUS PA field bus
Any polarity can be used between terminal 1 and 2
Max. permissible torque for the bus connections (Weidmüller): 5 Nm
NOTEPlease observe the instructions of the Conformity Certificate
Please observe the instructions of the EX Type examination
certificate PTB No. EX-97.D.2089X for the supply of the valve.
PTB No. EX-97.D.2089X for the supply of the valve. More
More information regarding the operation and installation of the
information regarding the operation and installation of the Type
Type 6115 (6520) valve can be found in the operating instructions
6115 (6520) valve can be found in the operating instructions
for these valves.
for these valves.
14 - 8642
• Bürkert piezo-valves type 6520 may be connected to the terminals for
actuators. Observe polarity. More detailed instructions for connection and
operation of the valves are to be found in the PTB Test Certificate and in the
Operating Manual for the valves.
Two sensors are always allocated to a valve. The sensors report the end
position of a connected process valve. The inputs can also report other
process parameters independent of the valves (e.g. scraper end positions).
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8642 - 15
5.2.2 Setting the Station Addresses
DIP switch 1 to 7Bit 1 to Bit 7
NOTE
In the PROFIBUS PA, each station is given an address. These addresses are
set up using the DIP switches 1 to 7.
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The permissible address range lies between 3 and 124
The LED flashes when the device is engaged in cyclic data communication.
The LED lights briefly on connecting the device.
If the device detects an internal error, the LED remains lit.
The DIP switches are only read in when the unit is switched on.
1
2
3
4
5
2
2
2
2
2
6
2
:
:
If switch 8 is in the ON position, the internal address is used!
This address can be set up via the field bus.
permitted
address range
3 ... 124
5.2.4 Watchdog
In order to recognize errors better, we recommend operating the device in
cyclic data communication with „DP watchdog“.
16 - 8642
6CONFIGURATION OF THE NETWORK
6.1Memory allocation for the effective data traffic
Basis: handbook for your PLC
In order to be able to carry out the correct settings of the configuration
program, copy the unit-specific file (buer6521.GSD) from Bürkert into the
directory that contains the configuration software. For reading in and editing
the configuration, please read the documentation for your PLC or process
control system.
Further information regarding memory allocation can be found in the handbook.
6.2System parameters
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NOTE
ATTENTION!
All profile data refers to the profile Version 3.0 Class B.
There, you will also find detailed information about the
parameters.
When writing in parameters, ensure that the voltage is
present!
6.2.1 Physical block
6.2.1.1 Slot 0
Parameter type:
Nnon-volatile parameter which must be taken into
SStatic, non-volatile; when writing, the version counter
D (dynamic)The value will be calculated in the block, or be read
C (constant)The parameter does not change.
account in the work cycle. It does not belong to the
static update code however.
ST_REV is incremented
from another block
8642 - 17
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Abs.
LengthTyp eDescription
Index
172NST_REV
1832STAG_DESC
192SSTRATEGY
201SALERT_KEY
211STARGET_MODE
223N/S(RCAS)MODE_BLK
238DALARM_SUM
2416CSOFTWARE_REVISION
2516CHARDWARE_REVISION
262CDEVICE_MAN_ID
272CDEVICE_ID
2816Nserial number
294DDIAGNOSIS
306DDIAGNOSIS_EXTENSION
314CDIAGNOSIS_MASK
326CDIAGNOSIS_MASK_EXTENSION
352SFACTORY_RESET
3632SDESCRIPTOR
3732SDEVICE_MESSAGE
3816SDEVICE_INSTAL_DATE
391SLOCAL_OP_ENA
401SIDENT_NUMBER
6917DVIEW_1
(not yet in the profile)
Table 2: Physical Block Slot 0
18 - 8642
6.2.1.2 Description of the standard parameters
These parameters are contained in the physical block, the functional block and
the transducer block.
ALARM_SUMThis parameter contains the current status of the Block
ALERT_KEYThis parameter contains the identification number of the
MODE _BLKThis parameter contains the current mode and the
ST_REVA block has static block parameters, that are not
STRATEGYGrouping of Funtion Block. The STRATEGY field can be
TAG_DESCEvery block can be assigned a textual TAG description.
Alarms. The parameter ALARM_SUM is not supported
at the moment.
plant unit
an event (crossing a limit).
permitted and normal mode of the block
changed by the process. Values are assigned to this
parameter during the configuration or optimisation. The
value of theparameter ST_REV must increase by 1
after every change of a static block parameter. This
provides a check of the parameter revision.
used to group blocks.
The TAG_DESC is the address of the block. The
TAG_DESC must be unambiguous and unique in the
fieldbus system.
normally set by a control application or an operator.
. It helps to identify the location (plant unit) of
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8642 - 19
6.2.1.3 Characteristics of the standard parameters
Rel.
Var iab le Data typeMemorySizeAccess
Index
1ST_REV Unsigned 16N2r, w
2TAG_DESC Octet String *S32r, w
3STRATEGY Unsigned 16S2r, w
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4ALERT_KEYUnsigned 8S1r, w
5TARGET_MODEUnsigned 8S1r, w
6MODE_BLK
actual
allowed
normal
7ALARM_SUMDS-42D8r
Table 3: Allocation of the standard parameters
DS-37
3r
N **
Cst
Cst
*The preferred data type should be
Visible String
**N accepted mode = RCAS
Abbreviations:
Memory (memory class required)
NNon-volatile parameter that must be observed in the working
cycle. It does not, however, belong to the static updating
code.
SStatic, non-volatile; on writing the version counter isincreased
ST_REV.
D (dynamic)The value is calculated in the block or read from another
block.
Cst (constant)The parameter does not change.
Access
rread only
wwrite only
20 - 8642
The
View Object
Standard Parameters
Rel.
Index
1ST-REV2
2TAG_DESCRIPTION
3STRATEGY
4ALERT_KEY
5TARGET_MODUS
6MODUS_BLK3
7ALARM_SUM8
Table 4:
Structure
Variab leView_1View_2 View_3 View_4
View Object
of the Standard Parameters
Mode
This data structure consists of character strings for current, set and normal
modes.
Data typeMode
Key attributeIndex = 37
IdentificationNumber of the elements
IdentificationList of the elements
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EName of the elementData type (index)Size (Byte)
1actualUnsigned 8 - (5)1
2allowedUnsigned 8 - (5)1
3normalUnsigned 8 - (5)1
Table 5: List of elements of the Structure mode
8642 - 21
Out of Service (O/S)The block is not being evaluated. The output is
maintained at last value or, in the case of output
class function blocks, the output may be maintained at an assigned
or configured
fail-safe
fail-safe
value.
value, last value
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Manual 1 (Man)The block
Automatic (Auto)For forming the
through an interface device.
invert
Remote CascadeThe block
(RCas)Application running on an interface
The layout of a function block or
parameter. The values of the
1. Target
This is the mode which is requested by the user. The values which are allowed
by the
allowed mode
determined by the bit sequence in the following manner: