ProSoft Technology ControlLogix inRAx MVI56E-MNETR User Manual page 128

Reference
User Manual
Presuming successful processing by the node specified in the command, a
3
response message is received into the Client driver for processing.
4 Data received from the node on the network is passed into the module's
internal database, assuming a read command.
Status information can be requested by the processor and returned in a
5
Status block.
Special functions, such as Event Commands and Command Control options,
6
can be generated by the processor and sent to the Client driver for action.
Client Command List
In order for the Client to function, the module's Client Command List must be
defined. This list contains up to 100 individual entries, with each entry containing
the information required to construct a valid command. This includes the
following:
Command enable mode
(0) disabled
o
(1) continuous
o
(2) conditional
o
IP address and service port to connect to on the remote server
Slave Node Address
Command Type - Read or Write up to 100 words per command
Database Source and Destination Register Address - Determines where data
will be placed and/or obtained
Count - Select the number of words to be transferred - 1 to 100
Poll Delay - 1/10
Client Command Errors
You can use the MNET Client 0 Command Error Pointer in the configuration to
set the database offset register where all command error codes will be stored.
This means that the first register refers to command 1 and so on.
Offset
1
2
3
...
...
For every command that has an error, the module automatically sets the poll
delay parameter to 30 seconds. This instructs the module to wait 30 seconds
until it attempts to issue the command again.
As the list is read in from the configuration file and as the commands are
processed, an error value is maintained in the module for each command. This
error list can be transferred to the processor. The errors generated by the module
are displayed in the following table.
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Modbus TCP/IP Interface Module with Reduced Data Block
th
seconds
Description
Command 1 Error
Command 2 Error
Command 3 Error
....
...
MVI56E-MNETR ♦ ControlLogix Platform
ProSoft Technology, Inc.
June 14, 2011