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VVDED397053USBook Page 17 Tuesday, November 28, 2000 9:01 AM
Bulletin No. VVDED397053US
November 2000
Section 2 — Software Set-Up
Interbus-S Protocol
• If you are already in Monitoring operating status, and return to sending
messages to the drive controller, the communication link is already
established and it is not necessary to send an INITIATE service
message.
• If you wish to access the ATV58 drive controller via message handling
before switching to Monitoring operating status, right-click on the
Controller Board icon, then Control, Other... and select messages,
beginning with an INITIATE service message.
For more details on using the IBS CMD G4 software, refer to the Phoenix
Contact user's manual (reference: IBS CMD SWT G4 UM E) or contact
your local Phoenix Supplier.
INTERBUS-S PROTOCOL
Principle
Interbus-S is a communication protocol which creates a hierarchical
structure consisting of one master and one or more slave devices. It is
used to interrogate one or more intelligent slaves from the master. A
multidrop link connects the master and the slaves.
The master manages the exchanges and has sole responsibility for them.
The master repeats the interrogation when an incorrect exchange occurs
and declares the interrogated slave absent when there is no reply within
the allotted time. No slave may transmit a message without having been
interrogated.
Interbus-S protocol uses two types of data exchange between master
and slave:
• periodic exchange
• exchanges via message handling.
Periodic Exchange
The Interbus-S card supports two input periodic words and two output
periodic words which are assigned to the parameters shown in
Table 7 on page 18.
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