Using The Umc100 In A Modbus Rtu Network - ABB UMC100-FBP Technical Description

Universal Motor Controller
UMC100-FBP
Technical Description

Using the UMC100 in a MODBUS RTU Network

The MODICON Modbus® RTU protocol is a widely used network protocol based on the RS485 physi-
cal layer. It is provided in many PLCs that do not offer any other fieldbus. To integrate the UMC100 into a
Modbus network, use the MRP21-FBP FieldBusPlug.
The diagram below shows the sketch of a Modbus line with two MRP21-FBP, two UMC100s and avail-
able accessories. More details are available in the technical manual of MRP21-FBP.
24VDC

Modbus Line with MRP21 and UMC100. Please note that the accessories of CANopen and DeviceNet are
the same. Do not be confused by the fact that the DNF and DNR have a 'DN' in their names.
UMC100-FBP
AC500 including
Modbus Master
DNF11
There are no device description files defined by the Modbus standard.
This makes it more difficult to parameterise Modbus devices via the bus.
Therefore we recommend that you parameterize the UMC100 either using the
UMC100-PAN or using a laptop with the UTF21-FBP communication adapter.
UMC with
FieldbusPlug
MRP21
UMC
24VDC
- 30 -
UMC with
FieldbusPlug
MRP21
UMC
DNR11 Bus
Termination
24VDC
FieldBusPlug / Issue: 03.2012