3 SimpleCAN

Source: SimpleCAN Manual V2 — design, program, install, maintain, and decommission Safety Simplifier and SimpleCAN networks.

3.1 Introduction

SimpleCAN is a safety communication protocol that can be used to send safety information between different Simplifier networks, and between Safety Simplifier networks and the Simplifier Gateway (to interface with, for example, Siemens/ProfiNET).

Up to 64 different SimpleCAN IDs can be used in a network, each sending 16 bits of safe data and 16 bits of unsafe data (for status and indication). This means the maximum number of safety bits that can be sent on one SimpleCAN network is 1024.

SimpleCAN between systems: one node in each radio network is connected to a shared SimpleCAN bus, which carries data between the two separate projects.

3.2 Safety notes

Warning

SimpleCAN shall only be used with the data link layer defined in ISO 11898-1 (Controller Area Network).

Warning

SimpleCAN is a protocol on top of CAN 2.0. All requirements and limitations of CAN 2.0 also apply to SimpleCAN.

Warning

The physical CAN layer shall be continuous. No repeater devices can be used to connect larger networks.

Warning

Appropriate standards shall be considered depending on the application field. In machinery and process environments, the principles defined in the common part of EN 61918 shall apply.

Warning

Only SimpleCAN compatible devices (Safety Simplifier and Simplifier Gateway) can be transmitters in a SimpleCAN network. Silent listeners are allowed to listen to the network in silent mode (according to CAN 2.0).

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Contents

Section	Topic
3.3 PFH-d and Reaction Time	Safety values, cycle time and timeout
3.4 Installation and Commissioning	CAN 2.0 cable requirements and CAN card wiring
3.5 Programming and Configuration	SimpleCAN TX/RX blocks and network configuration
3.6 Diagnostics and Maintenance	Troubleshooting a bus with no communication
3.7 Revision History	Changes to the SimpleCAN manual