User guide

Instructions

Chapter 18

I/O Message and Communication

18–8

When you are online, you can locate the cursor on the MSG instruction,

press the Zoom key, and observe the current status of some of these bits:

F1 F2 F3 F4 F5

ZOOM on MSG –(MSG)– 2.0.0.0.2

NAME: MESSAGE READ/WRITE

MSG TYPE: WRITE LD/LS ADDR:N7:40

TARGET: 500 CPU TARG NODE: 5

CTRL BLK: N7:0 TARG OS/AD:N7:6

EN ST DN ER NR TO MSG LEN: 2

0 0 0 0 0 0

EDT_DAT

Successful MSG Instruction Timing Diagram

Rung goes True.

Target node

receives packet.

Target node processes packet

successfully and returns data

(read) or writes data (success).