ProSoft Technology MVI69-HART - Manual (Page 93)

MVI69-HART ♦ CompactLogix Platform Reference
HART Multi-drop Master Communication Module User Manual
ProSoft Technology, Inc. Page 93 of 169
March 29, 2012
Read Command Error List (Block 9950)
Block 9950 identification code requests the Command List Error/Status Table for
a single port from the module for the 99 user configurable commands. The
following table describes the format of this block.
Word Offset in Block Data Field(s) Description
0 Block ID This field contains the value of 9950 identifying the block
type to the module.
1 Port Number This field contains the port number to report in the
response block. Valid values are 0 to 3 for ports 0 to 3 on
the module.
2 Number of
Commands to
report
This field contains the number of commands to report in
the response message. The value has a range of 1 to 50.
This number must not be greater that the "command
count" value configured in the configuration file.
3 Start Index of
First
Command
This parameter sets the index in the command list where
to start. The first command in the list has a value of 0.
The last index in the list has a value of MaxCommands -
1.
4 to 63 Spare Not Used
Response to a block 9950 request: The module will respond to a valid request
with a block containing the requested error information. The format for the block
is shown in the following example:
Word Offset in Block Data Field(s) Description
0 Block ID This field contains the value of 9950 identifying the block
type to the PLC.
1 Block ID This is the next block requested by the module.
2 Port Number This field contains the port number (0 to 3) corresponding
to the data contained in the block.
3 Number of
Commands
reported
This field contains the number of commands contained in
the block that must be processed by the PLC. This field
will have a value of 1 to 50.
4 Start Index of
First
Command
This field contains the index in the command list for the
first value in the file. This field will have a value of 1 to
MaxCommands-1.
5 to 54 Command
List Errors
Each word of this area contains the last error value
recorded for the command. The command index of the
first value (offset 4) is specified in word 3 of the request
block. The number of valid command errors in the block is
set in word 3 of the block. Refer to the command error list
to interpret the error codes reported.
55 to 63 Spare Not Used