MVI71-HART ♦ PLC Platform
Reference
HART Multi-drop Master Communication Module
User Manual
Page 67 of 146
ProSoft Technology, Inc.
Block Response
Offset
Description
Length
0
1000 to 1066
1
1 to 60
Data to place in database
60
61 to 63
Not Used
3
For example, for a Read Data Area of 2 blocks (120 words), blocks 1000 and 1001
would be used.
Block 9902: Command Control
The block 9902 identification code is used by the processor to enable a set of
commands that have their enable code set to 4 or 5 (one shot). The value referenced by
the address associated with the command, Enable DB Address, will be set to -1 to
enable the command for a one-shot (enable code 5) or continuous (enable code 4)
execution. After the command is executed, the module resets the register to 0 to disable
the command for the one-shot mode. The format for this command block is shown in the
following table.
Word Offset in Block
Data Field(s)
Description
0
Block ID
This field contains the value of 9902 identifying the
enable command to the module.
1
Port Number
This is the HART port number (0 to 3) for the
command. Each port has its own command list.
2
Command
count
This field contains the number of commands to enable
in the command list. Valid values for this field are 1 to
60.
3 to 62
Command
Numbers to
enable
These 60 words of data contain the command numbers
in the command list to enable. The command index
starts at 1. The value referenced by the Enable DB
address associated with each command will be set to -
1.
63
Spare
Not Used
There is no response to this block by the module. The module will place the selected
commands into the command queue. If the command references a unit that is not
defined, the command will not be placed in the command queue. Normal processing of
the command list will continue after the commands specified in this block are processed.
