ProSoft Technology MVI56E-MNETR - Manual (Page 80)

MVI56E-MNETR ♦ ControlLogix Platform Ladder Logic
Modbus TCP/IP Interface Module with Reduced Data Block User Manual
Page 80 of 153
ProSoft Technology, Inc.
August 31, 2009
3.1.1 MNETRDATA
This object holds data to be transferred between the processor and the MVI56E-
MNETR module. The user data is the read and write data transferred between
the processor and the module as "pages" of data up to 40 words long.
Name Data Type Description
ReadData INT[600] Data read from module
WriteData INT[600] Data to write to module
The read data (R EAD D ATA ) is an array set to match the value entered in the
Read Register Count parameter of the MNET.CFG file. For ease of use, this
array should be dimensioned as an even increment of 40 words. This data is
paged up to 50 words at a time from the module to the processor. The ReadData
task places the data received into the proper position in the read data array. Use
this data for status and control in the ladder logic of the processor.
The write data (W RITE D ATA ) is an array set to match the value entered in the
Write Register Count parameter of the MNET.CFG file. For ease of use, this
array should be dimensioned as even increments of 40 words. This data is paged
up to 40 words at a time from the processor to the module. The WriteData task
places the write data into the output image for transfer to the module. This data is
passed from the processor to the module for status and control information for
use in other nodes on the network.
3.1.2 MNETRSTATUS
This object views the status of the module. The MNETRSTATUS object shown
below is updated each time a read block is received by the processor. Use this
data to monitor the state of the module at a "real-time rate".
The following table describes the structure of this object.
Name Data Type Description
PassCnt INT Program cycle counter
BlockStats MNETRBlockStats Status information for the data transfer
operations between the processor and the
module
Reserved1 INT Reserved for future use
Reserved2 INT Reserved for future use
MNETReq INT The number of MNET (Port 2000) requests
received
MNETResp INT The number of MNET (Port 2000) responses
sent
MBAPReq INT The number of MBAP (Port 502) requests
received
MBAPResp INT The number of MBAP (Port 502) responses
sent
ClientStatus MNETRClientStats Client Status Data