Siemens SIMATIC TI500 Especificaciones descargar pdf (Pagina 136)

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SIMATIC 545/555/575 System Manual

Installing 575 System Hardware

All VMEbus masters (including the 575 CPUs) require access to the

VMEbus daisy-chain control signals, including the bus grant and interrupt

acknowledge signals:

• IACKIN* • BG1IN* • BG2OUT*

• IACKOUT* • BG1OUT* • BG3IN*

• BG0IN* • BG2IN* • BG3OUT*

• BG0OUT*

Refer to Table 4-7 for pinouts.

Place any board that does not provide the BGxOUT* signals to the right of

any board that requires these signals. All of the 575 boards (CPUs and I/O

modules) pass through the daisy-chain signals.

Third-party slaves may occupy any unused address. There are two ways to

assign addresses to third-party slaves:

• Calculate used address spaces and hard-assign an address.

• Design the software on a third-party master CPU to log in slave boards

and to assign their addresses: refer to the SIMATIC 575 Interboard

Communication Specification (PPX:575–8103).

WARNING

Memory overlaps in board addresses can cause erratic system operation.

Erratic system operation can cause death or serious injury to personnel, and/or

damage to equipment.

To minimize the risk of erratic system operation, ensure that there are no

memory overlaps in board addresses.

Daisy-Chain

Signals

Assigning

Addresses to

Third-Party Slaves

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