Prosoft-technology MVI69-MCM Bedienungsanleitung PDF herunterladen (Seite 125)

MVI69-MCM ♦ CompactLogix or MicroLogix Platform Reference

Modbus Communication Module User Manual

ProSoft Technology, Inc. Page 125 of 167

March 22, 2011

Read Block - Read Slave Status

Offset Description Length (words)

0 3002 to 3006 or 3102 to 3106 1

1 Write Block ID 1

2 to 61 Slave Poll Status Data 60

62 to (n + 1)

Spare (if Block Transfer Size > 60)

(n - 62)

n= 120, or 240 depending on the Block Transfer Size parameter (refer to the

configuration file).

5.5.3 Event Command

Event Command blocks send MODBUS commands directly from the ladder logic

to one of the Master ports. The Event Command will be added to the high-priority

queue and will interrupt normal polling so that this special command can be sent

as soon as possible.

Note: Overuse of Event Commands may substantial slow or totally disrupt normal polling. Use

Event Commands sparingly. Event Commands are meant to be used as one-shot commands

triggered by special circumstances or uncommon events.

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Prosoft-technology MVI69-MCM Bedienungsanleitung Seite 125