User`s guide

Bulletin No. VVDED397053US Section 2 — Software Set-Up

November 2000 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.

VVDED397053USBook Page 17 Tuesday, November 28, 2000 9:01 AM