Danfoss RedCAN Operating guide
User Manual
PLUS+1® GUIDE
Extended Dynamic RedCAN
www.danfoss.com
User Manual
PLUS+1® GUIDE Extended Dynamic RedCAN User Manual
Revision history Table of revisions
Date Changed Rev
December 2019 Converted to Engineering Tomorrow standards 0201
January 2013 Check Appendix modes added AD
February 2012 Wording, parameter changes AC
March 2010 First revision AB
January 2010 Original revision AA
2 | © Danfoss | December 2019 AQ00000114en-000201
User Manual
PLUS+1® GUIDE Extended Dynamic RedCAN User Manual
Contents
Risk Reduction
Downloading and testing your applications..........................................................................................................................4
Important information to reduce risk....................................................................................................................................... 4
Fault checking and error handling.............................................................................................................................................4
Introduction
Overview..............................................................................................................................................................................................5
Normal CAN structure............................................................................................................................................................... 5
RedCAN structure........................................................................................................................................................................5
Transparent connection mode...............................................................................................................................................6
Normal connection mode........................................................................................................................................................6
Redundant connection mode................................................................................................................................................ 7
RedCAN Overview
Overview..............................................................................................................................................................................................8
Description.................................................................................................................................................................................... 8
RedCAN inputs.............................................................................................................................................................................8
RedCAN Outputs......................................................................................................................................................................... 8
Block Functions
Block types........................................................................................................................................................................................10
Link block..........................................................................................................................................................................................10
Link block inputs............................................................................................................................................................................ 10
Link block outputs.........................................................................................................................................................................11
Beat block......................................................................................................................................................................................... 11
Beat block inputs............................................................................................................................................................................11
Beat block outputs.........................................................................................................................................................................12
Diagnostic block.............................................................................................................................................................................13
Diagnostic block inputs...............................................................................................................................................................13
Diagnistic block outputs..............................................................................................................................................................13
Freeze block.....................................................................................................................................................................................14
Freeze block inputs....................................................................................................................................................................... 14
Freeze block outputs.................................................................................................................................................................... 14
Relays block......................................................................................................................................................................................14
Relays block inputs........................................................................................................................................................................14
Relays block outputs.....................................................................................................................................................................15
Theory of Operations
Theory of operation...................................................................................................................................................................... 16
Troubleshooting
Possible error conditions.............................................................................................................................................................21
Fixing errors..................................................................................................................................................................................... 21
Table of errors and system reactions......................................................................................................................................21
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User Manual
PLUS+1® GUIDE Extended Dynamic RedCAN User Manual
Risk Reduction
Downloading and testing your applications
Once you have created an application, you have the responsibility to download and test the application.
You should only download your application to hardware or change software parameters while the
vehicle is not in operation. After downloading, test application operation under normal and abnormal
operating conditions. You should make sure that:
•
Individual inputs produce expected outputs .
•
Combinations of inputs do not produce unexpected or dangerous outputs
•
Fault handling and error checking work as designed
Important information to reduce risk
The applications that you create with the PLUS+1® GUIDE Service Tool program typically control heavy,
powerful, and mobile off-road equipment such as tractors, cranes, and harvesters.
Fault checking and error handling
The PLUS+1® GUIDE Service Tool program has no automatic protections against these risks. The Service
Tool has no protection against the risks that result from bugs in the Service Tool software, errors in the
Service Tool manual, or incompatibilities between software versions of the Service Tool.
You must design and test your application to reduce these risks.
You have the responsibility when designing a Service Tool application to include the checking and the
error handling needed to reduce risks in normal and abnormal operating conditions.
The following are some items to consider when developing fault checking and error handling for your
application:
•
How the machine is normally used.
•
Possible operator errors and their consequences.
•
Industry safety standards and legal requirements.
•
Input and output failures and their consequences. These failures can include:
•
Joystick, sensor, and other inputs suddenly going to 100 % or to O %.
‒
Outputs that control machinery direction, speed, and force suddenly changing direction or going
‒
to 100 % or to O %.
Decide how likely each failure is. The more likely a failure, the more you need protect against the
consequences of the failure .
•
The sequence of events and consequences of a fault or error.
•
The sequence of events and consequences of an emergency stop.
Warning
Under normal operating conditions, using this type of machinery always involves risk of personal injury
and equipment damage. Abnormal operating conditions increase the risk of personal injury and
equipment damage.
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Connecting
Circuit
Driver
CAN
Controller
CPU
Software
User Manual
PLUS+1® GUIDE Extended Dynamic RedCAN User Manual
Introduction
Overview
Normal CAN structure
A normal CAN structure is illustrated below. There is one single CAN connection per module. Bus
termination is handled with external resistors.
Normal CAN Structure
Danfoss RedCAN is based on a redundant CAN communication principal. RedCAN uses two CAN
connections per module. The modules are connected in a ring structure to provide a second path for
communication in the event of a segment error.
RedCAN structure
RedCAN Structure
Termination of the bus is handled automatically inside the ECU by the RedCAN connection. No external
resistors are required.
System behavior depends on parameter settings. Incorrect parameters may lead to system malfunction. It
is recommended to disconnect the controller from the system and set parameters before reconnecting it
to the system.
RedCAN uses one standard CAN driver with controller but has the additional connecting circuit logics to
terminate the bus and provide the second communication path in the event of a bus failure.
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CAN Driver
with Controller
R1 R2
RE1
RE2
CAN Driver
with Controller
R1 R2
RE1
RE2
User Manual
PLUS+1® GUIDE Extended Dynamic RedCAN User Manual
Introduction
Transparent connection mode
The Connecting Circuit consists of relays that provide three different connection options:
Transparent Mode Normal and Redundant connections are both connected to the CAN controller.
Terminators are not connected.
Transparent connection mode
Normal connection mode
Normal Connection
Mode
Both Normal and Redundant connections are terminated. Only Normal
connection is connected to the CAN controller.
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CAN Driver
with Controller
R1 R2
RE1
RE2
User Manual
PLUS+1® GUIDE Extended Dynamic RedCAN User Manual
Introduction
Redundant connection mode
Redundant Connection
Mode
Both Normal and Redundant connections are terminated. Only Redundant
connection is connected to the CAN controller.
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