ProSoft Technology MVI71-MNET - Manual (Page 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