PAC-INT-CAN-RXTX

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CAN Protocol Integration Kit for PAC Project, Transmit and Receive

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PAC-INT-CAN-RXTX

Production Specification

The Opto 22 CAN Integration Kit for PAC Project - Transmit and Receive provides sample PAC Control subroutines and charts so that your Opto 22 SNAP PAC System equipped with one or more SNAP-SCM-CAN2B modules can communicate with devices on a Controller Area Network (CAN). The SNAP-SCM-CAN2B is a high-speed serial communications module that can transmit to and receive data from CAN devices.

When transmit functionality is enabled, all transmit and receive data between the module and the SNAP PAC brain or controller are ASCII encoded and frame delimited for robust communications.

The sample strategy in the integration kit runs on an Opto 22 SNAP PAC controller. The CAN Transport Protocol (described in the CAN RX/TX Integration Kit for PAC Project Technical Note, form 2151) provides direct access to a SNAP-SCM-CAN2B which implements the CAN transport and physical layers. Access to higher layer protocols—such as J1939, NMEA 2000, CANopen, and DeviceNet—needs to be implemented by the customer.

The sample subroutines show you the PAC Control commands to use for CAN communication and the format of data in them. The charts illustrate how to call the subroutines. Using PAC Control, you can easily add to or modify the subroutines and charts to match your system’s requirements.

NOTE: This integration kit requires SNAP-SCM-CAN2B modules with firmware R2.0b or higher. With this firmware the module can both send and receive CAN data; with earlier firmware the module only receives data.

To add transmit capability to an existing module, download the newer firmware and then follow steps in the PAC Manager User's Guide (form 1704) to update the firmware.

For modules with firmware R1.0d and lower that only receive data, use a different integration kit (part number PAC-INT-CAN-RX).
Requirements:
  • A PC with PAC Project R9.2a or higher (Basic or Professional).
  • A PAC Control strategy that includes a SNAP PAC I/O unit with one or more SNAP-SCM-CAN2B serial communication modules with firmware R2.0b or higher, connected to devices on a CAN network. The I/O unit must use a SNAP PAC R-Series controller or EB-series brain with firmware version R9.2a or higher.
  • An Opto 22 SNAP PAC R-series or S-series controller.

SNAP-SCM-CAN2B Communication Module Data Sheet

The SNAP-SCM-CAN2B serial communications module provides one channel for transmitting data to or receiving data from devices on a Controller Area Network (CAN).

The SNAP-SCM-CAN2B module is designed for use with Opto 22’s SNAP PAC R-series controllers and SNAP PAC EB-series brains. The brain or controller processes the data from the module and can communicate the data to other parts of an Opto 22 SNAP PAC System™ or to another system (such as a Modbus® system or an OPC client).

CAN RX/TX Integration Kit for PAC Project Technical Note

The Opto 22 CAN Integration Kit for PAC Project - Transmit and Receive (part number PAC-INT-CAN-RXTX) provides sample PAC Control subroutines and charts so that your Opto 22 SNAP PAC System equipped with one or more SNAP-SCM-CAN2B modules can communicate with devices on the CAN network.

This technical note shows you how to install and use the integration kit.

No downloads are available for this product.

Video: SNAP PAC System Overview

This overview describes the four integrated components of the SNAP PAC system: software, controllers, brains and I/O. This hardware and software system is designed for industrial control, remote monitoring and data acquisition.