Burkert 8312 Series User manual

V1.00/EN/00743886/2020-09-09
Type 8312
Pressure transmitter, CANopen
Operating Manual

Factory setting
Baud rate: 500 kbaud
see Chapter 4.1 for setting
Node ID:
for 8312: 124
see Chapter 4.2 for setting
The basic principles of CANopen are available on the website www.can-cia.org

Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Typographical conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.3 Brief description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.4 Dimensions, tightening torques, wrench size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2 Identifying the device version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1 Nameplate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2.1 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3 Setup program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1 Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.1 Setting the CAN baud rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.2 Setting the node ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6 CANopen function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.1 Overview of communication functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.2 NMT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.3 Sync . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.4 Emergency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.5 PDO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.6 SDO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.7 Heartbeat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.8 Node Guarding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.9 LSS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7 Device function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.1 Device profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.2 Data flow: pressure channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.3 Data flow: temperature channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
8 Object dictionary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Contents
9 Programming examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
9.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
9.2 Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
9.3 Testing the connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
9.4 Heartbeat Producer Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
9.5 Boot mode “Minimum bootup” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
9.6 Event time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
9.7 Setting the node ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
9.8 Setting the baud rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
9.9 Reading out the minimum value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
9.10 Reading out the maximum value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
9.11 Reading out the measurement in “Float” format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

5
1 Introduction
1.1 Typographical conventions
Warning signs
Note signs
abc1Footnote
Footnotes are remarks that refer to specific points in the text. Footnotes
consist of two parts:
A marker in the text and the footnote text.
The markers in the text are arranged as continuous superscript numbers.
The footnote text (in smaller typeface) is placed at the bottom of the page and
starts with a superscript number.
✱Action
This symbol indicates that an action to be performed is described.
The individual steps are marked by this asterisk, for example:
✱Connect plug
Danger
This symbol is used when there may be danger to personnel if the instructi-
ons are ignored or not followed correctly.
Caution
This symbol is used when there may be damage to equipment or data if the
instructions are ignored or not followed correctly.
Note
This symbol is used when your special attention is drawn to a remark.
Reference
This symbol refers to further information in other chapters.

6
1 Introduction
1.2 Preface
Please read these Operating Instructions before commissioning the instru-
ment. Keep the manual in a place that is accessible to all users at all times.
Please assist us to improve these operating instructions, where necessary.
1.3 Brief description
Pressure transmitters are used for measuring relative (gauge) and absolute
pressures in liquids and gases. The pressure transmitter operates on the thick-
film strain gauge measuring principle. An alumina ceramic (Al2O3) is used as
the base material for the sensing element.
The pressure measurement is digitized and made available for further proces-
sing via the CANopen interface (CAN slave).
Several useful extra functions have been implemented through the DS 404
device profile.
All settings can be made using standard CANopen software tools.
All necessary settings are described in this manual. However, if any
difficulties should still arise during start-up, you are asked not to
carry out any unauthorized manipulations on the unit. You could
endanger your rights under the instrument warranty!
Please contact the nearest subsidiary or the head office in such a
case.

7
1 Introduction
1.4 Dimensions, tightening torques, wrench size
Ceramic version
Metal version
With process connection G 1/4"
according to EN 837
With process connection NPT 1/4"
according to EN 837
The total height is increased by the height of the socket and cable used.
661.)
G ¼"
15
M12 x 1
27
4
2
Ø 26,8
Ø 5
Ø 9,5
661.)
15
M12 x 1
27
Ø 26,8
NPT ¼"-18
With process connection G 1/4"
according to EN 837
With process connection
NPT 1/4"
according to EN 837
With process connection front-flush
G3/4"
according to EN ISO 228-1
(1) Process seal G 3/4"
The total height is increased by the height of the socket and cable used.
781.)
Ø 5
15
M12 x 1
Ø 9,5
G ¼"
2
4
27
Ø 27
M12 x 1
781.)
15
27
Ø 27
NPT ¼"-18
M12 x 1
Ø 27
G ¾"
Ø 31,9
16
20
32
841.)
(1)

8
2 Identifying the device version
2.1 Nameplate
Position The nameplate is located at the housing surface.
Device ID no. The device ID number uniquely identifies an article and, together with the
device type no., determines the selected device variant.
TN Internal no.
Device type no. The device type no. can help to localize the associated device description file
(EDS) as part of the file name.
Load EDS:
1. Go to web page https://country.burkert.com/
2. Select your country
3. Click on Continue to website
4. Confirm or change cookie settings
5. Enter the device type number, e.g. 8312 (see device nameplate) in the
search field
6. Click on the first result of the search
7. In the area Software download the ZIP file DeviceDescription
8. Unpack the ZIP file
9. Identify and select the required EDS file by device type no.
The EDS file is now available for use with the CANopen configuration tool to con-
(1) Device type no. (2) Device ID no.
(3) Device serial no. (4) Manufacturer ID no. for CANopen
devices
(5) Device revision no. (6) Fabrication no.
(7) Standardized product
designation
(8) TN
(9) Digital Interface (10) Voltage supply, for more in-depth
information see „Technical Data“
(11) Input

9
2 Identifying the device version
figure and verify the device. This can be used to configure and check the device.
Date of
manufacture The device's date of manufacture (year and calendar week) is part of the fabri- cation number. Digits 12 to 15 denote the year of manufacture and the calen-
dar week.

10
3 Transmitter
3.1 Application
Transmitters are used for acquiring pressures or temperatures in liquid or gas-
eous media.
The measurements from the pressure or temperature sensors are digitized and
made available for further processing via the CANopen. Several useful extra
functions are implemented through the DS 404 device profile. All settings can
be made using standard CANopen software tools.
3.2 Block diagram
Pressure P or A/D
Date / Name (11)
Drag pointer
(Min / Max) (10)
Range
monitoring (9)
Decimal point (8)
Linearization (3)
Fine calibration (7)
Scaling (6)
Sensor
monitoring (5)
Calibration (2)
PDO Measurement, 32 bit
Status, 8 bit
(13)
EMERGENCY
Probe break /
short-circuit
(12)
(1)
Device functions
(DS 404 profile)
Heartbeat
(15)
SYNC
(16)
NMT
(17)
LSS
(18)
Filter (4)
Temperature T
Node Guarding
(15)
SDO
Parameters
Measurements
Status
(14)

11
3 Transmitter
3.2.1 Operation
(1) The analog signal from the pressure cell or the temperature sensor is dig-
itized.
(2) The pressure or temperature signal is digitally calibrated at the factory.
(3) The temperature signal is linearized.
(4) Undesirable signal fluctuations can be suppressed through the (adjust-
able) filter constant.
(5) The sensor monitoring facility continuously checks the correct perfor-
mance of the sensor signal and triggers high-priority emergency tele-
grams in the event of an error.
(6) The measurement can be scaled to any dimensional unit (or in % of
range).
(7) Fine calibration features an autozeroing function (with pressure sensors
only) and a freely adjustable shift of the characteristic (offset).
(8) The measurements are output with a freely selectable decimal place.
(9) Range monitoring features freely selectable upper and lower limits. The
result is output as a status byte together with the measurement value in
the PDO telegram.
(10) The drag pointer function stores the minimum and maximum pressure
measurements.
(11) Date and name of the last servicing action can be stored.
(12) An emergency telegram is triggered in the event of a sensor fault.
(13) The PDO telegram contains the 32-bit measurement and the 8-bit status.
The measurement that is output can be controlled by means of different
trigger conditions.
(14) Parameters can be set through SDO telegrams, and measurements and
status can be requested.
(15) The heartbeat signal or Node Guarding1can be used to additionally mon-
itor the transmitter functions.
(16) Measurement transmission can additionally be controlled by using the
Sync command.
(17) The NMT telegrams serve to control the operating status of the transmit-
ter.
(18) The CAN node ID and CAN baud rate is set via LSS or SDO, according to
choice.
1Node Guarding is only available for transmitters with sensor.

12
3 Transmitter
3.3 Setup program
All instrument parameters, see ➩Chapter 8 “Object dictionary”, page 28, can
be accessed via the CANopen object dictionary (EDS file) and can be set using
standard CANopen software tools. An appropriate EDS file is available for all
device types. The file is downloadable free of charge from the Bürkert home
page www.burkert.com using the product typ number 8312 in the search field.

13
4 Installation
4.1 Electrical connection
Bus cable - the bus specifications to ISO 11 898 must be observed
- cable diameter 6 to 12 mm
- conductor cross-section up to 1.5mm2per core
- signal cables must be routed separately from cables with voltages
above60 V
- use cables with twisted cores
- avoid the vicinity of electrical installations, or use screened cables
Connection
Circular
connector M12 x1; 5-pole to IEC 60 947-5-2
Earth the instrument at the pressure connection.
The bus ends must be provided with a line termination.
➩Chapter 4 “Installation” / “Line termination”, page 14.
Connection Terminalassignment
M12
connector
Supply voltage
DC 10 to 30 V
CAN_V+
CAN_GND
2
3
CANopen screen
CAN_H
CAN_L
1
4
5
1
5
4
2
3
2
5
3
1
4
Plug Socket

14
4 Installation
Line termination The CAN bus has a linear topology. Each end of the bus must be terminated
with a 120 resistor, to avoid signal reflections and, as a consequence, trans-
mission problems.
CAN-Bus
CAN-H
CAN-L
120 Ω120 Ω
Knoten nKnoten 1
Node 1 Node n
CAN bus

15
5 Commissioning
5.1 Setting the CAN baud rate
General The baud rate is set to 500 kbaud ex-factory.
The CAN baud rate can be set both via SDO telegrams (object dictionary) and
LSS.
Setting via SDO The CAN baud rate can be reprogrammed via the CANopen object dictionary,
index 0x2001.
This setting will only be accepted as the new CAN baud rate after resetting the
transmitter.
Setting via LSS The transmitters support the LSS standard (Layer Setting Services) as per
DSP-305, V1.1.
This can be used to set the baud rate and node ID for the entire plant in a stan-
dardized manner.
The LSS address consists of four elements, which are indicated on the name-
plate: Vendor-ID, Product code, Revision-No., Serial-No.
The latest setup tools from different manufacturers can also be used to oper-
ate this function.
As an alternative, the baud rate and node ID are also settable via SDO (see
above).
CAN baud rate
[kbaud]
Max. bus length
[m]
Entry in
object dictionary
0x2001
1000 25 0
800 100 1
500 100 2
250 250 3
200 250 99
125 500 4
100 500 98
50 1000 6
20 2500 7

16
5 Commissioning
5.2 Setting the node ID
General Ex-factory, the node ID is preset as follows:
for 8312: 124
The node ID can be set both via SDO telegrams (object dictionary) and LSS.
Setting via SDO The node ID can be reprogrammed via the CANopen object dictionary, index
0x2000, thereby enabling all transmitters of a plant, for instance, to be pro-
grammed to new node IDs from a central CAN terminal.
This setting will only be accepted after resetting the transmitter.
Setting via LSS The transmitters support the LSS standard (Layer Setting Services) as per
DSP-305, V1.1.
This can be used to set the baud rate and node ID for the entire plant in a stan-
dardized manner.
The LSS address consists of four elements, which are indicated on the name-
plate: Vendor-ID, Product code, Revision-No., Serial-No.
The latest setup tools from different manufacturers can also be used to ope-
rate this function.
As an alternative, the baud rate and node ID are also settable via SDO (see
above).
Each node ID may only be allocated once on the bus.

17
6 CANopen function
6.1 Overview of communication functions
Communica-
tion profile The CAN interface communication functions correspond to the CANopen communication profile DS-301.
Objects Data exchange with CANopen devices takes place in the form of objects.
The table below contains the supported objects; these will be explained in the
sections that follow.
Object CAN identifier Function Note
NMT 0 network management bus master is the sender
SYNC 0x80 PDO synchronization bus master is the sender
EMERGENCY 0x80 + node ID alarm message
TPDO 1 0x180 + node ID measurement 1 and
status
identifier changeable
via object dictionary
0x1800,1
TPDO 5 inactive measurement 2 and
status
identifier changeable via
object dictionary
0x1804,1
only with twin probe
SDO (tx) 0x580 + node ID access to parameters
(object dictionary)
slave (8312) to master
SDO (rx) 0x600 + node ID access to parameters
(object dictionary)
master to
slave (8312)
Heartbeat 0x700 + node ID device monitoring cyclic “sign of life”
Bootup 0x700 + node ID device monitoring once, after power ON
LSS(tx) 0x7E4 = 2020 setting of baud rate,
or node ID
slave (8312) to master
LSS(rx) 0x7E5 = 2021 setting of baud rate,
or node ID
master to
slave (8312)

18
6 CANopen function
6.2 NMT
The transmitters support both the CANopen minimum bootup and the auto-
operational bootup.
NMT user data
Settings for
NMT
1Factory setting
Network management
command
Network management of object data
Byte 1
Command specifier
Byte 2
Node ID
Node start (6) 0x01 0 —127
(0 = all devices)
Node stop (7) 0x02
Enter preoperational state (8) 0x80
Reset node (10) 0x81
Reset communication (11) 0x82
Boot mode State after
power ON Setting of object 0x1F80
Minimum bootup Preoperational 0xC1
Auto-operational
bootup
Operational 0x8

19
6 CANopen function
6.3 Sync
The PDOs of the transmitter can be configured as “synchronous”. When a
Sync object has been received, the corresponding PDO will be transmitted.
Settings for
Sync The PDO transmission type can be switched between synchronous (controlled by the master) and asynchronous (event-controlled) in the object dictionary
(0x1800,2 or 0x1804,2).
Factory setting: event-controlled (=0xFF)
6.4 Emergency
In the event of a sensor short-circuit or sensor break, the transmitters will send
a high-priority emergency object (EMCY).
In this case the telegram is repeated cyclically. The cycle time can be set.
EMCY user
data (8 bytes)
Transmission type Setting the object
0x1800,2 (for PDO1)
0x1804,2 (for PDO5)
asynchronous 0xFF
synchronous 0x01
Sensor break Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8
5030 h
(hardware)
2 bytes
00000001
1 byte
1 or 2
(chann.)
1 byte
00000001
1 byte
not used
Sensor
short-circuit
Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8
5030 h
(hardware)
2 bytes
00000001
1 byte
1 or 2
(chann.)
1 byte
00000010
1 byte
not used
Reset error Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8
0000 h
(hardware)
2 bytes
00000000
1 byte
1 or 2
(chann.)
1 byte
xxxxxxxx
1 byte
not used

20
6 CANopen function
Setting for
Emergency Factory setting: once per second (= 1000 msec)
6.5 PDO
1 or 2 transmit PDO(s) (process data object) are available for the measure-
ments.
The setting for mapping (0x1A00) of the PDO user data is fixed to 0x9130
(measurement in fixed-point format) and to 0x6150 (status byte).
The calculation of these values is described in chapter 7 “Device function”,
page 26.
Status bit 0 = Sensor faulty (sensor monitoring)
Status bit 1 = overrange (measurement range monitoring)
Status bit 2 = underrange (measurement range monitoring)
EMCY time Setting the object
0x2002
milliseconds 0 — 65535 (0 = not repeated)
PDO
user data
(5 bytes) Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8
0x9130
4 bytes
measurement INT32
0x6150
1 byte
status
bit 2, 1, 0
not used
not included in transmission
If bit 0 is set, the measurement transmitted in the PDO is
invalid!