What you can do, Hardware configuration – GE Industrial Solutions OKCV3000CN DeviceNet User Manual

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support of Explicit Messages. The DGFC supports Parameter object.

This allows the card and the drive to be fully configured. A PC configurator could be connected either when
it is connected to a PLC or there is the LocalBus.

The table below sums up the main features of each mode:

Explicit Messages

LocalBus

Predefined Mode

Predefined Mode as

SBI

DeviceNet is used to... read and write drive

and DGFC parameters

to exchange IVAR and
FVAR among DGFC

to read and write fixed
parts of FWA

to read and write
synchronous and
asynchronous drive
parameters

DGFC is master or

slave?

slave only

slave and master
simultaneously

slave only

Type of master (1

DGFC

PLC

Can DGFC execute a
Bricks program?

Indifferent

Both master and slave
must execute program

must execute a

program

Compatibility with
other modes

all modes

all except Predefined
Mode as SBI

only Explicit Messages

Number of master

supported
simultaneously by
DGFC

up to 3, according to
DeviceNet resources

only one

Dedicated Bricks

none

CFIX, RFIX and WFIX

RFIX and WFIX

none

Length and number of

frames

not applicable

up to 4 words/packet
during I/O, many packets

up to 10 words in
reading and 10 in
writing, one frame

up to 10 words in
reading and lOin

writing, one frame

TNetlO

(*)

this section describes only the common master. Any DeviceNet node can support any mode, so for example, there

can be a PC card that supports the predefined mode

1.6. WHAT YOU CAN DO

If you want to use the DGFC only as DeviceNet interface (you don’t want to use Win+Drive and/or Bricks
programming) you can read only the next 3 chapters. In all the other cases you can skip only chapter 3.

1.1. HARDWARE CONFIGURATION

If you want to use the DGFC for a DeviceNet network, the DGFC needs an optional card called DNET. Remem-
ber that the DGF card is a technology card with its own commuhication protocol.

Eli

INTRODUCTION