Serial Interface (Option); Device Address; Transmission Protocol - janitza Prophi Operating Instructions Manual

Reactive Power Controller

Serial interface (Option)

Device address

If several devices are
connected via RS485,
a master (PC/PLC) can
tell the difference be-
tween them by their de-
vice addresses. Within one network, each Prophi must
have its own device address.
If Profibus protocol has been chosen, the address can be
given between 0 and 126. If Modbus protocol has been
chosen, the address can be given between 0 and 255.
The device address can be requested and changed in
menu "advanced programming".
Example: Change device address.
With key 3 you can
move to device address
in expanded program-
ming.
Confirm selection with
key 1.
In this example the device address is indicated as 1.
Select the number to be changed by using key 2.
The selected digit is flashing.
Change digit with key 3.
Confirming key 1 for about 2 seconds, the changes are
saved and Prophi keeps working in automatic mode.
Attention!
m
If a switching frequency of 50Hz is programmed
for the transistor outputs, the serial interface does
not work!
Page 44

Transmission protocol

For the connection of
Prophi to an existing
field bus system are two
transmission protocols
available:
0 - Modbus RTU (Slave) and
1 - Profibus DP V0 (Slave) .
With Modbus protocol you have access to the data from
table 1 and with Profibus protocol you have access to the
data of table 2.
Example: Select transmission protocol.
Please move to device
address in expanded
programming using key
3. Now press key 2 for
transmission protocol.
Confirm selection with key 1.
In this example the transmission protocol is protocol
1=Profibus DP. Digit 1 is flashing.
Please change over between protocol 1 and 2 by pressing
key 3.
Confirming key 1 for about 2 seconds, the changes are
saved and Prophi keeps working in automatic mode.
= Key 1 = Key 2 = Key 3