Chapter 3 Deployment CPU 21x-1Bx06 Manual VIPA System 200V
3-14 HB97E - CPU - RE_21x-1Bx06 - Rev. 13/20
Project transfer
There are the following possibilities for project transfer into the CPU:
• Transfer via MPI
• Transfer via MMC when using a MMC programmer
The structure of a MPI net is electrically identical with the structure of a
PROFIBUS net. This means the same rules are valid and you use the
same components for the build-up. The single participants are connected
with each other via bus interface plugs and PROFIBUS cables. Per default
the MPI net runs with 187.5kbaud. VIPA CPUs are delivered with MPI
address 2.
The MPI programming cables are available at VIPA in different variants.
The cables provide a RS232 res. USB plug for the PC and a bus enabled
RS485 plug for the CPU.
Due to the RS485 connection you may plug the MPI programming cables
directly to an already plugged plug on the RS485 jack. Every bus
participant identifies itself at the bus with an unique address, in the course
of the address 0 is reserved for programming devices.
A cable has to be terminated with its surge impedance. For this you switch
on the terminating resistor at the first and the last participant of a network or
a segment.
Please make sure that the participants with the activated terminating
resistors are always power supplied. Otherwise it may cause interferences
on the bus.
Transfer with MPI programming cable (MPI communication)
MPI
USB-MP I Ad apter
Power
Active
Error
VIPA 950-0KB31
USB
VIPA
MPI programming cable
STEP7
from Siemens
MPI net
Terminating Terminating
Transfer via Green Cable (serial communication)
Via exclusively direct
plugging of the Green Cable to a MP
2
I jack you may
establish a serial connection between PC and CPU. Set the PC-COM port
and the transfer rate 38400Baud at Local port. The settings of the register
MPI are ignored at employment of the Green Cable.
Green Cable
STEP7
from Siemens
MPI net
Overview
Transfer via MPI
MPI programming
cable
Terminating resistor
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