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modbus tcp/ip interface module
mvi69-mnet
the inrax modbus tcp/ip communications module (mvi69-mnet) is designed to allow compactlogix processors to easily interface with other modbus tcp/ip protocol-compatible devices.
features and benefits
the module acts as a gateway between the modbus tcp/ip network and the allen-bradley backplane. data transfer between the module and the compactlogix processor is asynchronous to the modbus tcp/ip network, with the module"s internal database being used to exchange data between the processor and the network.
the mvi69-mcm module is a powerful communication interface for compactlogix platform processors. developed under license from rockwell automation, the module incorporates proprietary backplane technology that enables powerful data access between the module and the compactlogix processor.
some of the general specifications include:
- support for the storage and transfer of up to 5000 registers to/from the compactlogix processor"s controller tags
- module memory usage that is completely user definable
- 10/100 mb ethernet compatible interface
- configurable parameters for the client include:
- minimum response delay: 0 to 65535 ms
- floating point support
general specifications common to all modules in the mvi69 family include:
- single slot compactlogix backplane compatible
- the module is configured using the generic profile in the rslogix programming software
- supported compactlogix processors: l20/l30/l35
- the micrologix 1500 controller with lrp firmware version 6.0 or newer is supported by the module
- module setup via a simple configuration text file downloaded via configuration/debug port
- configuration data is stored in the module"s non-volatile memory
- 60 (default), 120 and 240 word input/output data transfer lengths available, user se-lectable
- multiple modules can be placed in the same rack -- up to the limits of the power supply and backplane data transfer
- local and extended rack -- the module will function in both the local and the extended rack configurations
- high speed data transfer across the backplane provides quick data up-date times. data transfer timing tests based on different input and output data block lengths yielded the following best case results with an l35e processor:
i/o blockdata transfer
size (words/sec)
60 words 5000
120 words 11000
240 words 18000
applications
the mnet solution is a powerful module with applications for the module found in most industries especially in the water/wastewater, oil, gas, electrical power, and food processing.
functional specifications
general protocol specifications
type | specifications |
communication parameters (configurable) | port 1: baud rate: 110 to 57.6k baud |
floating point data | floating point data movement supported, including configurable support for enron implementation |
modbus server protocol specifications
the server driver supports connections to modbus tcp/ip clients supporting service port 502 using the standard mbap protocol, and clients supporting modbus on service port 2000.
modbus tcp/ip server | |
general | supports five (5) independent server connections for service port 502 supports five (5) independent server connections for service port 2000 all data mapping begins at modbus register 40001. |
status data | error codes, counters, and port status available |
modbus function codes | 1: read output status 2: read input status 3: read multiple data registers 4: read input registers 5: write single bit 6: write single data register 15: write multiple bits 16: write multiple data register |
modbus tcp/ip client | |
general | the client driver supports the active reading and writing of data with modbus tcp/ip compatible devices. one client connection available (connect up to 100 servers/devices with 100 commands) |
status data | error codes available on an individual command basis. in addition, a slave status list is maintained per active modbus master port |
configurable parameters | number of active commands (up to 100 for client) min. command delay response timeout retry count command error pointer |
polling of command list | configurable polling of command list, including continuous and on change of data |
modbus function codes | 1: read output status 2: read input status 3: read multiple data registers 4: read input registers 5: write single bit 6: write single data register 15: write multiple bits 16: write multiple data register |
hardware specifications
dimensions | standard 1769 single-slot module |
current load | 800 ma max@ 5 vdc (serial)900 ma max@ 5 vdc (ethernet)power supply distance rating 2 |
operating temp. | 0 to 60 deg c |
32 to 140 deg f | |
storage temp. | -40 to 85 deg c |
-40 to 185 deg f | |
relative humidity | 5 - 95% (w/o condensation) |
led indicators | power and module status |
application status | |
serial port activity | |
serial activity and error status | |
cfg port | rj45 (db-9m w/ supplied cable) |
rs-232 only | |
no hardware handshaking | |
app port | rj45 (db-9m w/supplied cable) |
rs-232/422/485 jumper-se-lectable | |
rs-232 handshaking configurable | |
rs-422/485 screw terminal included | |
500v optical isolation from backplane | |
ethernet port (ethernet modules) | 10/100 mb ethernet compatible interface |
shipped with unit | rj45 to db-9m cables for each port |
6-foot rs-232 configuration cable |
ordering information
| part number | part desc-ription |
| mvi69-mnet | modbus tcp/ip interface module |
