Siemens ET 7Y Series Especificaciones descargar pdf (Pagina 181)

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ET 200S IM 151-7 CPU Interface Module

A5E00058783-04

Changing IM 151-7 CPU (6ES7 151-7Ax00..)

to IM 151-7 CPU (6ES7 151-7AA10-0AB0)

If you download your existing user program for the IM 151-7 CPU

(6ES7 151-7Ax00-0AB0) to an IM 151-7 CPU (6ES7 151-7AA10-0AB0), you may

encounter the following problems:

The SFC 56, SFC 57 and SFC 13 may work asynchronously

A number of asynchronous SFCs are always processed or, under certain

conditions, already processed following the first call (”quasi-synchronous”) on the

IM 151-7 CPUs (6ES7 151-7Ax00-0AB0).

These SFCs actually run asynchronously on the IM 151-7 CPUs

(6ES7 151-7AA10-0AB0). The asynchronous processing may continue for several

OB 1 cycles. As a result, a queue within an OB may become a continuous loop.

 SFC 56 ”WR_DPARM”; SFC 57 ”PARM_MOD”

This SFCs always function ”quasi-synchronously” on stand-alone

IM 151-7 CPUs (6ES7 151-7Ax00-0AB0).

They function asynchronously on stand-alone IM 151-7 CPUs

(6ES7 151-7AA10-0AB0) and distributed IM 151-7 CPUs.

Note

If you use the SFC 56 ”WR_DPARM” or SFC 57 ”PARM_MOD”, you should

always evaluate the BUSY bit of the SFCs.

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Siemens ET 7Y Series Especificaciones Pagina 181