Prosoft-technology MVI71-MNET Bedienungsanleitung PDF herunterladen (Seite 72)

MVI71-MNET ♦ PLC Platform Reference

Modbus TCP/IP Interface Module User Manual

Page 72 of 109 ProSoft Technology, Inc.

June 23, 2009

Offset Description Length

52 Command index 1

53 Command index 1

54 Command index 1

55 Command index 1

56 Command index 1

The last digit in the block code defines the number of commands to process in

the block. For example, a block code of 5003 contains 3 command indexes that

are to be placed in the command queue. The Command index parameters in the

block have a range of 0 to 99 and correspond to the module's command list

entries.

The module responds to a command control block with a block containing the

number of commands added to the command queue for the port. The following

table describes the format for this block.

Offset Description Length

50 0 1

51 5001 to 5006 1

52 Write Block ID 1

Number of commands added to

53 command queue 1

Warm Boot

This block is sent from the PLC processor to the module (output image) when the

module is required to perform a warm-boot (software reset) operation. This block

is commonly sent to the module any time configuration data modifications are

made in the controller tags data area. This will force the module to read the new

configuration information and to restart. The following table describes the format

of the control block.

Offset Description Length

50 9998 1

Cold Boot

This block is sent from the PLC processor to the module (output image) when the

module is required to perform the cold boot (hardware reset) operation. This

block is sent to the module when a hardware problem is detected by the ladder

logic that requires a hardware reset. The following table describes the format of

the control block.

Offset Description Length

50 9999 1

1 2 ... 67 68 69 70 71 72 73 74 75 76 77 ... 108 109

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Prosoft-technology MVI71-MNET Bedienungsanleitung Seite 72