1. Introduction: Display unit operating concepts
Control-system architectures
Protocols
Communication between the display unit and connected equipment is achieved by means of a communication protocol, which is selected when creating the application in XBT L100•.
The protocols available for the range support communication with the
Schneider range of PLCs, specific equipment (speed drives), etc.
These protocols are Uni-Telway and Modbus (master and slave).
There are several types of architecture, which enable one display unit to be linked to several devices or several display units to one device.
Point-to-point connection
One display unit linked to one device.
B
Modbus, Uni-Telway protocols:
- Modbus master
- Uni-Telway slave
- Modbus slave
ESC
Connected device
XBT ref.
N200/N400
NU400
N200/N400/N410(1)
R400/R410
Magelis
Note
In Uni-Telway, a slave number has a fixed value of 4
Modbus master protocol only
Not compatible with the Modbus slave protocol
B - 15
1. Introduction: Display unit operating concepts
Multipoint connection (XBT N401/N410/NU400/R410/R411)
One display unit linked to several devices (maximum of 15)
Modbus, Uni-Telway protocols:
- Modbus master
- Uni-Telway slave
PLC 1
Device 1
PLC 2
Device 2
PLC 3
Device 3
Other device
Device n
Multidrop connection (XBT N401/N410/R410/R411)
Several display units linked to one device
Modbus, Uni-Telway protocols:
- Modbus slave
- Uni-Telway slave
1 2 n
XBT ref.
N200/N400
R400
NU400
NU400
N200/N400/N410(1)
R400/R410
B - 16
Connected device
Note
Point-to-point only
No multidrop connection
Modbus master protocol only
Not compatible with the Modbus slave protocol
Magelis
