Contemporary Control Systems CANISA User Manual

CANISA

CANbus® Network Interface Module for ISA Bus Computers

INST ALLA TION GUIDE

INTRODUCTION

The CANISA is a Controller Area Network (CAN) adapter for ISA bus
computers. CAN is the data link layer technology used by DeviceNet and
Smart Distributed System. The CANISA supports 8-bit transfers and takes
advantage of the additional interrupts on the expanded bus.

The CANISA incorporates the Philips SJA1000 CAN stand-alone controller
chip which is used widely in both the automotive and general industrial
environments. Besides being backward compatible with the older 82C200,
the SJA1000 has more features than its predecessor. The 82C200 is
restricted to BasicCAN (11-bit identifiers) while the SJA1000 operates in
either BasicCAN or a new mode called PeliCAN™ which supports the CAN

2.0B specification (29-bit identifiers). The SJA1000 maintains extended
frame passivity while in the BasicCAN mode.

The SJA1000 features a 16 MHz clock, a larger receive buffer and better
acceptance-filtering — including the ability to extend the acceptance mask
to the data field. It has the ability to operate at data rates as great as 1 Mbps.

The CANISA incorporates the DeviceNet physical layer with an optically
isolated transceiver providing reverse voltage and short-circuit protection.
Field connectors include the DeviceNet 5-position open style and DB-9 as
defined by CAN in Automation (CiA).

The PeliCAN mode includes:

• Error counters with read/write access

• Programmable error warning limit

• Last error code register

• Error interrupt for each CANbus error

• Arbitration lost interrupt with detailed bit position

• Single-shot transmission (no re-transmission)

• Listen only mode (no acknowledge, no active error flags)

• Hot plugging support (software driven bit rate detection)

• Acceptance filter extension (4-byte code, 4-byte mask)

• Reception of ‘own’ messages (self reception request)

SPECIFICATIONS

Power Requirements ISA Bus CANbus

+5 V
80 mA

Environmental

Operating temperature: 0°C to +60°C
Storage temperature: -40°C to +85°C

Data Rates

50 kbps, 100 kbps, 125 kbps, 250 kbps, 500 kbps, 1 Mbps

Dimensions

4.20" x 6.50" (106 mm x 165 mm)

Shipping Weight

1 lb. (.45kg)

I/O Mapping — BasicCAN

The CANISA can occupy any of the following 32-byte blocks of I/O space.

000 020 040 060 080 0A0 0C0 0E0 100 120 140 160 180 1A0 1C0 1E0
200 220 240 260 280 2A0 2C0 2E0 300 320 340 360 380 3A0 3C0 3E0

I/O Mapping — PeliCAN

The CANISA can occupy any of the following 128-byte blocks of I/O space.

+24 V
80 mA

000 080 100 180 200 280 300 380

Interrupt Lines

Supports selection of IRQ3 through IRQ15

Compatibility

Compliant with CAN 2.0A and CAN 2.0B

Regulatory Compliance

CE Mark
CFR 47, Part 15 Class A

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INSTALLATION

HARDWARE: The CANISA can be installed in any ISA computer bus.
With power removed from the computer, remove its cover. Take care when
installing the CANISA because both it and the exposed computer
motherboard are sensitive to electrostatic discharge. To prevent inadvertent
damage, touch the metal chassis of the internal power supply to discharge
yourself, then remove the CANISA from its protective ESD package.

Before proceeding with the installation, configure the jumpers according to
the instructions in the section entitled “Configuring Jumper Settings.”

After the jumpers are properly set, insert the CANISA into any available
ISA bus slot. Once the CANISA is mounted, it can be attached to the
CANbus with either the screw terminals or the DB-9 connector. To
facilitate use of the screw terminals, a mating female connector has been
provided. The CANISA complies to the physical layer specification for
isolated ports, therefore bus power (V+, V-) must be present in order for its
transceiver to function. Hardware installation is completed by replacing the
computer’s cover.

Screw

Function

CAN_L

Drain

CAN_H

Not Used

Terminal DB-9

V –

V +

Connector Pin Assignments

1 3,6
2 2
3 5
4 7
5 9

— 1,4,8

SOFTWARE:

files which allows the operating system to allocate computer resources to the
card. The instructions for installing these files are provided on the disk in
the file named README.TXT.

The CANISA comes with a disk which contains the driver

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