User guide

enFORCE DSP1500 Main Unit Hardware Manual

PAGE 5 - 37 (Rev. 4.0)

Chapter 5: Control Interfaces

Daughter board

5.7 Modbus Plus

Interface

Modbus Plus is a local area network system designed for industrial control and monitoring

applications developed by Modicon Inc. The network enables programmable controllers, host

computers and other devices to communicate throughout the plant. Modbus Plus is normally used in

industrial automation to transfer fast data (up to 1Mbit/sec.) for motor controllers, MMI, I/O units and

other industrial equipment.

This interface board has up to 16 words of assigned input data and 16 words of assigned output

data (256 inputs / 256 outputs). FEC I/O is assigned to the I/O points in these data areas (some I/O

will be designated spare). FEC Inputs match the discrete input layout. FEC Output locations are

programmed using the DSP User Console Software.

FEC integrates the Modbus Plus board manufactured by HMS Fieldbus Systems AB into the Main

Unit’s modular I/O board. For further technical information on the Modbus Plus interface go to the

HMS website. (www.hms.se

)

Item Description

1 Application Connector

2 Modbus Plus Connector

3 Node ID Switch

4 Source ID Switch

5 Status LEDs (4)

6 Watchdog LED

Red - (flashing @ 2Hz) - ASIC and FLASH ROM check fault.

Green (flashing @ 2Hz) - module not initialized.

Green (flashing @ 1Hz) - module initialized and running OK.

Red (flashing @ 1Hz) - RAM check fault.

Red (flashing @ 4Hz) - DPRAM check fault.

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