ProSoft Technology MVI71-MNET - Manual (Page 66)

MVI71-MNET ♦ PLC Platform Reference
Modbus TCP/IP Interface Module User Manual
Page 66 of 109
ProSoft Technology, Inc.
June 23, 2009
Word Description
2 This word contains the index in the command list for the second command to be entered
into the command queue.
3 This word contains the index in the command list for the third command to be entered
into the command queue.
4 This word contains the index in the command list for the fourth command to be entered
into the command queue.
5 This word contains the index in the command list for the fifth command to be entered
into the command queue.
6 This word contains the index in the command list for the sixth command to be entered
into the command queue.
7 to 63 Spare
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.
Word Description
0 This word contains the block 5001 to 5006 requested by the processor.
1 This word contains the next write block identification code.
2 This word contains the number of commands in the block placed in the command
queue.
3 to 63 Spare
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
0 9998 1
1 to 63 Spare 63
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
0 9999 1
1 to 63 Spare 63