Failure Monitor
Detect node failures.
Bus Watch
Quick and easy analysis of bus status.
Message Trigger
Detect events in bus data.
Potentialities
The CANalarm is a low priced analysis tool that can be installed in the bus permanently.
It makes it possible to build up a separate and redundant monitor without change of configuration and program of the master controller. It works passive and is therefore non-reactive.
The whole device is placed into a 9-pin D-Sub plug. It is easy to implement with the autobaud function.
The field of application is wide. We will talk about it in the following.
Which application comes to your mind ?
Configuration
Configuration
The configuration is done with a small tool on the PC. The CANalarm can stay within the bus for this.
As an option, you can do basic settings with the two buttons and the display.
Licensing Model
Licensing Model
In the basic configuration, the CANalarm is equipped for monitoring bus traffic load and error frames.
With software licenses, you can upgrade to Failure Monitoring for up to 32 nodes. The Message Trigger is another software license, which makes it possible to give an alarm at a certain CAN telegram.
The purchased licenses, as well as firmware updates, can be installed with the PC tool.
Switching Output
Switching Output
The alarm output can be configurated at switching condition, duration and polarity.
The following screenshot from the PC software gives an idea about that.
Basic Functionality
Basic Functionality
Without any other licenses, the CANalarm monitors bus traffic load and error frames.
If the bus traffic load passes a limit determined, the alarm output will be switched on. The amount of error frames and their rate/s is also monitored. For this data, you can also free determine an alarm limit.
Failure Monitoring
Failure Monitoring
Up to 32 nodes can be monitored by one CANalarm. The CAN telegrams of each node are recognized. If a certain node doesn’t send another telegram within a to be determined time, the alarm output switches respectively to his configuration.
Do you need a monitor for more than 32 nodes ? Just take another CANalarm.
Message Trigger
Message Trigger
The message Trigger gives the alarm as it receives a certain telegram. You can switch each and every bit in a mask relevant or irrelevant, therefore the properties can be exactly defined. This function opens wide possibilities, but it requires a good knowledge of the certain telegrams on your bus.
Technical Specifications
Technical Specifications
| Electrical parameters | |
| Supply voltage | + 9 … 32 VDC |
| Supply current | 16 mA @ 24 V |
| Mechanical parameters | |
| Temperature range | 0 °C bis 50 °C |
| Degree of protection of the housing | IP20 |
| CAN | |
| Protocol | CAN 2.0 A and B according to ISO 11898 – 2 |
| Supported baud rates | 10k, 20k, 50k, 100k, 125k, 250k, 500k, 800k, 1 MBit/s Automatic detection Additionally user-defined : 33.3, 62.5, 83.3, 200, 400 kBit/s |
| Connections | CAN 9-pin D-Sub potential-free switch (60 V/1.25 A AC/DC) |
Order Informations
Product | Description | GEMAC order number /shoplink |
| CANalarm – Basic Set | CANalarm incl. Quick Start Guide | PR-22565 – 00 |
| License Failure Monitor | Licence key for the Failure Monitoring of CAN nodes | SW-22565 – 10 |
| License Message Trigger | Licence key for the Analysis of CAN telegrams | SW-22565 – 11 |