System Bus Interface In Conjunction With Cable Converters Rs-232/Rs-485 (For Four-Wire Bus) - Samson TROVIS 5474 Mounting And Operating Instructions

Communication
Parameters*
Modem timeout (t)
Number of redial attempts (C)
Phone number of building control station
(tELno)
Phone number of alternative recipient
(rESno)
** Digits 0 to 9, P = Pause, - = End, max. 23 characters
* –> Section 10.3 ("Description of communication parameters to be adjusted")
10.2 System bus interface in conjunction with cable converters
RS-232/RS-485 (for four-wire bus)
A constant bus connection is required (data cable) for the operation of the controller with serial
RS-485 interface. The bus line links the control units/devices in an open ring. At the end of the
bus line, the data cable is connected to the control station using an RS-485/RS-232 converter
(e.g. TROVIS 5484).
The maximum range of the bus connection (cable length) is 1,200 meters. A maximum of
32 devices can be connected to such a segment.
If you wish to use more than 32 devices in line or need to bridge greater distances, make sure
repeaters (e.g. TROVIS 5482) are installed to replicate the signal. With 8-bit addressing, a
maximum of 246 devices can be addressed and connected to a bus.
Warning!
!
You are required to follow the relevant standards and regulations concerning lightning and
overvoltage protection on installation.
Functions
Modbus
Modem function
Modbus 16-bit addressing
Parameters*
Station address (ST.-NR)
Baud rate
* –> Section 10.3 ("Description of communication parameters to be adjusted")
68
EB 5474 EN
WE Parameter level / Range of values
5 min PA9 / 1 to 255 min
5 PA9 / 0 to 99
– PA9 / Set as required**
– PA9 / Set as required**
WE Configuration
ON Co9 -> Fb00 = ON
OFF Co9 -> Fb01 = OFF
OFF Co9 -> Fb04
WE Parameter level / Range of values
255 PA9 / 1 to 247 (with Fb04 = ON: 1 to 999)
9600 PA9 / 300 to 19200