ProSoft Technology MVI56E-MNETC - Manual (Page 128)

Guide to the MVI56E-MNETC User Manual MVI56E-MNETC ♦ ControlLogix Platform
User Manual Modbus TCP/IP Client Enhanced Communication Module
Page 128 of 183 ProSoft Technology, Inc.
February 3, 2013
Event Sequence Command Count Status (4200)
This block displays the command queue status data for all clients. The response
is the priority command queue count and the Event Sequence Command status
queue count.
Block Request from Processor to Module
Word Offset Description Length
0 4200 1
1 to 247 Reserved 247
Block Response from Module to Processor
Word Offset Description Length
0 Reserved 1
1 Write Block ID 1
2 to 31 Command queue status data for each Client 30
32 to 248 Reserved 216
249 Read Block ID: 4100 to 4129 1
In words 2 to 31 of this block, each word has two bytes:
 Byte 1: Number of Event sequence commands for which status has not yet
been retrieved (up to 15). This corresponds to the
MNETC.STATUS.EventSeqCmdPending.Client[x]_QueueCount controller
tag.
 Byte 2: Total number of commands waiting in the command queue. This
includes Event Commands, Event Commands with Sequence Numbers, and
Command Control messages. This corresponds to the
MNETC.STATUS.EventSeqCmdPending.Client[x]_WaitingMsgs controller
tag.
Controller Tags
To retrieve status data for all 30 clients at a time, enter the appropriate values in
the following members of the MNETC.STATUS.EventSeqCmd controller tag in
the ladder logic.
Controller Tag Data Type Description
Trigger BOOL Set the value of this tag to 1 to trigger the command
queue status data request.