Prosoft-technology ILX69-PBM Bedienungsanleitung PDF herunterladen (Seite 78)

Contents ILX69-PBM ♦ CompactLogix or MicroLogix Platform

User Manual PROFIBUS Master Communication Module

Page 78 of 124 ProSoft Technology, Inc.

February 4, 2015

Handshake Acknowledge Bits

Bit

Offset

Data

Type

Structure

Member

Description

BOOL

HsAck0

SlvDiagCnf , Slave Diag Confirmation

BOOL

HsAck1

GlbCtrCnf , Global Control Confirmation

BOOL

HsAck2

Reserved, set to 0

BOOL

HsAck3

Reserved, set to 0

BOOL

HsAck4

Reserved, set to 0

BOOL

HsAck5

Reserved, set to 0

BOOL

HsAck6

Reserved, set to 0

BOOL

HsAck7

Reserved, set to 0

The Handshake Acknowledge Bits provide an indication to a command that has been

processed. Every handshake acknowledge bit has a corresponding handshake request bit.

A command can be triggered by setting the corresponding handshake request bit in the

device command register of the output array. If the handshake acknowledge bit is equal to

the corresponding handshake request bit, the command has completed and the user

program can begin the next command. If unequal, the command is still being processed.

 HsAck0 – Handshake Acknowledge 0

This bit indicates the processing of a slaveDiag request. If this bit is equal to SlvDiagReq

in the Command register, the command has been processed. If unequal, the command

is still in progress.

 HsAck1 – Handshake Acknowledge 1

This bit indicates the processing of a Global Control request. If this bit is equal to

GlbCtrlReq in the Command register, the command has been processed. If unequal, the

command is still in progress.

 HsAck2..7 – Handshake Acknowledge 2 … 7

Reserved for future use.

Paging Mechanism / Block Transfer

The PLC program controls the block transfer of input and output data. The block transfer

uses 2 bytes of the output data area and 2 bytes of the input data area. These byte pairs are

located in the "Command Register" and "Status Register" area of the Input and Output

image. Transferring input and output data is independent from each other. This allows

exchanging process data using ladder logic even if the input and output size differ from each

other.

The PLC program flows as: Update inputs > Process data > Update outputs

1 2 ... 73 74 75 76 77 78 79 80 81 82 83 ... 123 124

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