Prosoft-technology MVI69L-MBS Manuel d'utilisateur télécharger pdf (Page 124)

Reference MVI69L-MBS ♦ CompactLogix Platform

User Manual Communication Module

Page 124 of 154 ProSoft Technology, Inc.

January 6, 2014

7.4.1 Event Blocks

Blocks 1000 to 1255: Event Port 1

Event Command blocks send Modbus commands directly from the ladder logic to

the Master port. The Event Command is added to the high-priority queue and

interrupts normal polling so that this special command can be sent as soon as

possible.

Note: Overuse of Event Commands may substantially 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.

Blocks 1000 to 1255: Request from Processor to Module

Offset

Description

Write Block ID: 1000 to 1255 for a Port 1 command. The last 3 digits of the

command are used to specify the slave address to use for the command.

Internal address in the module to be used with the command.

Count parameter that determines the number of digital points or registers to

associate with the command.

Swap type for the data.

Modbus Function Code to be associated with the command.

Modbus address in the slave device to be used in the command.

6 to 239

Spare

Blocks 1000 to 1255: Response from Module to Processor

Offset

Description

Read Block ID: 1000 to 1255 requested by the processor.

Write Block ID: To be used by the processor in its next Write block

Result of the event request. 1 = the command was placed in the command queue; 0

= no room was found in the command queue.

Number of commands in the command queue for the specified port.

4 to 239

Spare

1 2 ... 119 120 121 122 123 124 125 126 127 128 129 ... 153 154

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Prosoft-technology MVI69L-MBS Manuel d'utilisateur Page 124