Rockwell Automation 1747-PT1, D1747NP002 Hand-Held Terminal User Manual

Page 250

Instructions

Chapter 18
I/O Message and Communication

18–4

After you make a selection

[F2]

[F4]

, the display changes to the

following:

3. Enter Control Block –

ZOOM on MSG –(MSG)– 2.0.0.0.*
NAME: MESSAGE READ/WRITE
MSG TYPE: WRITE LD/LS ADDR:
TARGET: 500 CPU TARG NODE: 0
CTRL BLK: TARG OS/AD:
CTRL BLK 7 WORDS MSG LEN: 0
ENTER CONTROL BLK:

This is an integer file address that you select. It is a 7–element file,
containing the status bits, target file address, and other data associated
with the message instruction.

After you enter an address, the display changes to the following.

4. Local Destination/Source File Address–

ZOOM on MSG –(MSG)– 2.0.0.0.*
NAME: MESSAGE READ/WRITE
MSG TYPE: WRITE LD/LS ADDR:
TARGET: 500 CPU TARG NODE: 0
CTRL BLK: N7:0 TARG OS/AD:
CTRL BLK 7 WORDS MSG LEN: 0
LOCAL SOURCE FILE ADDR:

LD – Local Destination
LS – Local Source

If this is a read message instruction, this parameter is the local destination
file address, the address in the local processor which is to store data that is
read from the target node. If this is a write message instruction, this
parameter is the local source file address, the address in the local
processor which stores data that is written to the target node. Valid file
types are S, B, T, C, R, N.