Device Net Interface for Mentor II, MD25

MD25

Device Net is a high speed communications network and protocol, that allows large amounts of data to be transferred

quickly to and from network nodes. The Device Net interface will detect the network data rate, and automatically synchronize to it.

The Device Net interface for Mentor II is a slave node only.

Device Net networks are "centralized" systems, requiring a master controller (usually a PLC) which controls all

communications with slave nodes on the network.

	Fully conformant
	Easy fit add on card for Mentor II
	Device Net is a high speed communications network and protocol that uses the Controller Area
	Network (CAN) hardware layer
	Fast data transfer between network nodes
	Each Node configured with a unique network address
	Polled data connections with a minimum data transfer period of 5 MS
	Cyclic data transfer with a minimum "heartbeat rate" of 50 MS
	Can be configured to transfer with 4 or 6 data bytes in each direction
	Supports data rates up to 500 Kbits/sec
	Supports two or three 16 bit data words
	Full data mapping allows any polled or cyclic data work to control or source from any drive
	parameters
	Default mappings -
	- Speed/frequency feedback
	- Torque feedback
	- Status word provides status bits about 15 drive functions, e.g. drive healthy, drive running, at
	speed etc.
	- Speed/frequency reference
	- Torque feedback reference
	- Control word allows ENABLE, RUN and DIRECTION signals, plus reference selection and user
	bit parameters to be transmitted in one cyclic data word
	- Status word provides status bits of 15 drive functions, e.g. drive healthy, drive running, at
	speed etc.
	- Control word allows ENABLE, RUN and DIRECTION signals, plus reference selection and user
	bit parameters to be transmitted in one polled data word
	"Foreground" and "Background" data transfer rates for polled data, where background data is
	transmitted every N foreground cycles
	Explicit (or non-cyclic) data channel allows the master controller to access any drive parameter



Network
	CAN optically isolated physical layer
	Data rates from 125 Kbits/sec to 500 Kbits/sec
	Up to 500m network length at 125 Kbits/sec
	Up to 100m network length at 500 Kbits/sec
	Up to 64 nodes on a single network
	Device Net specification

Environment
	Ambient Temperature: -5ºC to +50ºC
	Storage Temperature: -40ºC to +50ºC
	Weight: 76g
	Maximum Altitude: 4000 m
	Humidity: +5% to +95% at 40ºC non-condensing