Prosoft-technology MVI69-EGD Manual de usuario descargar pdf (Pagina 76)

MVI69-EGD ♦ CompactLogix or MicroLogix Platform Reference

GE Ethernet Global Data Communication Module

Page 76 of 96 ProSoft Technology, Inc.

November 3, 2008

PDU Type = 37

Masked Write Response.

The Masked Write Response provides an acknowledgment to the masked write

request message. A positive response indicates that all of the data has been

written to the responding device. An error response indicates that one or more of

the transfers to the responding device failed. Responders shall use all available

means to assure that a write is performed in its entirety or not performed at all.

Requesting applications are advised that if partial failures of the write can cause

problems with the control algorithm, they should include only one cell in each

write to assure complete knowledge of the disposition of the write request.

Requesters should be aware that some responding devices are not capable of

setting more than one bit in a request. Before sending a mask with more than

one bit set, the requester should assure that the responding device supports

multiple bit writes.

Packet

Info

Description Data

Source Port:

7937 (0x 1F01)

Destination Port:

7937 (0x 1F01)

Length:

xx bytes (0x 00 XX)

Checksum:

xxxxx (0x XX XX)

EGD's PDU Field: Offset Bytes Hex code

PDU Type:

0x 25

Message Flag:

0x HH

Request ID:

0x HH HH

PVN1:

0x 01

Status:

0x HH

Message Length:

0x HH HH

Configuration Signature:

2 0x HH HH

Address Type:

0x HH

Cell count:

0x HH

Producer ID:

0x HH HH HH HH

Exchange ID:

0x HH HH HH HH

Time Stamp:

0x HH . . . HH

UDP

EGD:

Reserved:

0x HH HH HH HH

1 2 ... 71 72 73 74 75 76 77 78 79 80 81 ... 95 96

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