FEC DSP1500 Main Unit - Manual (Page 77)

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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