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Modbus RTU settings
Modbus slave addr. 10 >
Baudrate 9600 >
Data bits 8
Stop bits 1
Parity None
ModbusTCP/IP gateway
Modbus 1 port 503 >
Modbus TCP/IP port (internal registers):
Port number 502 is re-
served for communication of S203 device. Information of Modbus
registers of S203 device are read through this port.
Max connections:
It is possible to decrease server load by changing
this setting that defines the maximum number of simultaneous con-
nections from different IP addresses to the server.
Idle timeout: This setting defines the time after which the server clos-
es an inactive connection.
Allowed address:
It is possible to improve the information security
of the system by taking permitted connection address into use. If the
value is 0.0.0.0, connections to the server are permitted from any IP
address. If you define one permitted connection address, connections
to the server are not permitted from any other IP address.
Function on:
This selection either enables or disables the Modbus/
TCP communication.
Modbus TCP/IP gateway ->Modbus 1 port:
It is possible to connect
a Modbus/RTU bus to S203 controller. The bus has its own port ad-
dress that is used to communicate with bus devices via Modbus/TCP
interface. Port 1 setting defines the TCP/IP port that functions as a
gateway to Modbus RTU-bus.
A tip! How to set the network settings easier and faster
You can make setting of the fixed network settings easier
•
if you know DHCP service exists in the network
•
if you wish to use a fixed IP address.
1. First, set DHCP function
On.
After the settings have been set successfully, set DHCP
Off.
2. Change
only
IP address manually provided by the network administrator.
Modbus TCP/IP
Modbus TCP port (internal registers) 502 >
Max connections 15 >
Idle timeout 10 >
Allowed address 0.0.0.0 >
Active On>
Modbus TCP/IP gateway >
SNMP
IP address 10.1.1.23 >
Acticve On >
Network settings
FTP Off >
Modbus TCP/IP >
ModBus RTU settings >
SNMP >
Access On >
System settings > Network settings->Modbus TCP/IP
If the Ouman Access is taken into use, the sent SNMP alarm mes-
sage will include the Access IP-address. In this case, Access IP
address must be entered as local IP-address in Ounet.
SNMP:
SNMP function can be used to send notifications about alarms
activating, inactivating and being acknowledged via SNMP protocol
to a desired server.
IP address:
The IP address of the target server to which messages are
sent. Ounet IP address is a default.
Active:
This selection either enables or disables the entire SNMP
function.
System settings > Network settings-> SNMP
Modbus RTU settings:
If S203 is connected to the Modbus RTU bus
as a slave, you have to set the address of the S203 device. Note! All
the slave devices connected to the bus must have unique address.
S203 can be as a master device in the Modbus-RTU bus. In this case,
the S203 is a gateway between Modbus TCP and RTU. As a default
S203 is a slave device. When you press and hold the OK button, the
hidden settings are displayed and you can change S203 to master
device.
System settings -> Network settings-> Modbus RTU settings
