If you wish to use more than 126 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 address-
ing, a maximum of 246 devices can be addressed and connected to a bus.
If there is no communication between the control system and the controller, interventions of
the control system in dynamic processes can be limited with regard to time using the
Control
system monitoring
function.
While valid Modbus requests are registered, the controller resets the time monitoring.
Nevertheless, after 30 minutes have elapsed, all level bits are re-initialized to “autonomous“
when an error has occurred.
Warning!
You are required to follow the relevant standards and regulations concerning lightning and
overvoltage protection on installation.
Functions
WE
Configuration
Modbus
1
CO6 -> F01 - 1
Modbus16-bit addressing
0
CO6 -> F02
Modem function
0
CO6 -> F03 - 0
Control system monitoring
0
CO6 -> F07
Parameters
*
WE
Parameter level / Range of values
Station address (ST.-NR)
255
PA6 / 1 to 247 with CO6 -> F02 - 1: 1 to 32000
Baud rate (BAUD)
9600
PA6 / 19200, 9600
* –> section 9.3 (“Description of communication parameters to be adjusted“)
9.3
Description of communication parameters to be adjusted
Station address (ST.-NR)
This address is used to identify the controller in bus or modem mode. In a system, each con-
troller needs to be assigned a unique address.
Baud rate (BAUD)
In a bus system, baud rate refers to the transfer speed between control system and controller.
In modem mode, baud rate refers to the transfer speed between controller and modem.
The baud rate adjusted at the controller must correspond with the baud rate of the control
system, otherwise no communication can be established.
EB 5576 EN
95
Communication
!
