Bosch PIN8 N1 Guía para resolver problemas descargar pdf (Pagina 640)

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10-58 Handling, Diagnostic and Service Functions MPH-02, MPB-02, MPD-02

DOK-INDRV*-MP*-02VRS**-FK01-EN-P

• P-0-0480, Patch function 1, source pointer

• P-0-0481, Patch function 1, attribute

• P-0-0482, Patch function 1, bit mask

• P-0-0483, Patch function 1, exponent

• P-0-0485, Patch function 1, display

• P-0-0486, Patch function 2, source pointer

• P-0-0487, Patch function 2, attribute

• P-0-0488, Patch function 2, bit mask

• P-0-0489, Patch function 2, exponent

• P-0-0491, Patch function 2, display

Functional Description

Read Access (Displaying Internal Storage Locations/Signals)

The patch function allows transforming any storage location into a data

object that can be read via the master communication. To do this, a

storage location is preset via the parameters P-0-0480, Patch function 1,

source pointer and P-0-0486, Patch function 2, source pointer. The

access to this address is configured via bits 0 to 2 of the parameters

P-0-0481, Patch function 1, attribute and P—0487, Patch function 2,

attribute. INT4 reads a 4-byte integer value starting from the source

pointer, INT2/INT1 read 2 bytes or 1 byte accordingly. FLOAT8 reads an

8-byte floating-point value (DOUBLE), FLOAT4 reads 4 bytes accordingly

(FLOAT).

Due to the processor architecture the possible memory accesses are

subject to certain restrictions. A 4-byte access, for example, is only

allowed for storage locations the address of which can be divided by 4.

The table below contains a complete overview of the allowed and

prohibited memory accesses.

Note: If you want to change the access mode via bits 0 to 2 of the

patch attribute parameters (P-0-0481/P-0-0487), this is only

possible if the patch source pointer that has just been set

(P-0-0480/P-0-0486) allows the new access mode (see table).

possible access to source addresses that ...

access as...

can be divided

by 4

(DWORD-aligned)

can be divided by 2,

but not by 4

(WORD-aligned)

do not have any

particular alignment

(BYTE-aligned)

INT4

INT2

áá

INT1

áá á

FLOAT8

FLOAT4

á: access allowed

X: access prohibited

Fig. 10-24: Possible access modes

The desired display format is set via bits 4 to 7 of the patch attribute

parameters (P-0-0481/P-0-0487). This allows interpreting the value read

as a decimal number with or without sign, as a hexadecimal number or as

Pertinent Parameters

1 2 ... 635 636 637 638 639 640 641 642 643 644 645 ... 727 728

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Bosch PIN8 N1 Guía para resolver problemas Pagina 640

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