Prosoft-technology MVI69E-MBTCP Manual de usuario descargar pdf (Pagina 128)

Reference MVI69E-MBTCP ♦ CompactLogix Platform

User Manual Modbus TCP/IP Enhanced Communication Module

Page 128 of 150 ProSoft Technology, Inc.

May 20, 2015

7.4.1 Event Command Blocks (2000 to 2019)

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

the specified MBTCP Client x. The Event Command is added to the high-priority

queue and interrupts normal polling so this special command can be sent as

soon as possible.

Note: Overusing 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 2000 to 2019: Request from Processor to Module

Offset

Description

Block ID 2000 to 2019 indicates this block contains a command to execute by the

Client Driver. The last two digits indicate which client to use.

Example: ‘2015’ utilizes client 15

1 to 4

IP address for the intended server for the message. Each digit (0 to 255) of the IP

address is placed in one of the four registers

TCP service port to use with the message

Modbus node address to use with the message

Internal Modbus address in the module to use

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

associate with the command

Swap type for integer data only

Modbus function code

Modbus address in the slave device associated with the command

12 to (n-1)

Spare

Where n = 60, 120, or 240 depending on the Block Transfer Size parameter.

Blocks 2000 to 2019: Response from Module to Processor

Offset

Description

Block ID 2000 to 2019 requested by the processor

The next read request block identification code

Result of the event request.

1=the command was placed in the command queue.

0= No room was found in the command queue.

-1=The client is not enabled and active.

Number of commands in queue

4 to (n-1)

Spare

1 2 ... 123 124 125 126 127 128 129 130 131 132 133 ... 149 150

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