Communication with PLCs and devices by the Bernecker&Reiner company
Modular distributed I/O system X20 by the B&R automation company
(www.br-automation.com)
offers wide spectrum of communication options:
Modbus TCP/IP,
PROFIBUS,
DeviceNet,
CanOpen,
POWERLINK,
EtherNet/IP ...
The Modbus TCP/IP protocol is e.g. implemented in the X20BC0087 module.
For this communication in the PROMOTIC system can be used: PmModbusMr - Driver for communication by Modbus Master protocol.
The communication on the PROFIBUS, DeviceNet ..
is accesible for the PROMOTIC application via the OPC interface.
The OPC server by B&R can be purchased separately or included in the Automation Studio software package.
Communication by Modbus protocol
For easy integration of this driver into the application it is handy to use:
For this driver, it is recommended to set the configurators:
- PmCommData > Parameters > Special Parameters > Area base addresses:
- base address "Bo = Coil/output bits" = 0
- base address "Bi = Input bits" = 0
- base address "Ro = Holding/output registers"
= 2048 (=800 hex) for analog outputs
= 9216 (=2400 hex) for digital outputs in the form of status words
- base address "Ri = Input registers"
= 0 for analog inputs
= 8192 (=2000 hex) for digital inputs in the form of status words
- PmCommData > Parameters > Special Parameters > Max.number of variables received in one message:
- max.number "Bo = Coil/output bits" = 1968
- max.number "Bi = Input bits" = 2000
- max.number "Ro = Holding/output registers" = 123
- max.number "Ri = Input registers" = 125
Communications by another protocols
Then the PROMOTIC application will communicate as a client by the OPC interface, i.e. by the PmOpcClient object, the PROMOTIC will be connected to the OPC server and thus communicate with the devices.
Using the PROMOTIC OPC client component is bound to purchase of the PmOPCClient license. With the freeware version PmFree, or when developing the application (with development environment for tersting purposes), this component is always functional.
PROMOTIC SCADA system documentation
- MICROSYS, spol. s r.o.
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