B&B Electronics MESR9xx Manual De Usuario

The number of Data bits, type of Parity and number of Stop bits selected define the 
serial port parameters at which the Modbus gateway will operate. These parameters must 
be configured to match the parameters set on the Modbus network connected to the 
Modbus gateway's serial port.  

Data Bits controls the number of bits of data in each character. Options include 5, 6, 7 or 
8 data bits. 

Parity controls the error checking mode. Options are No Parity, Odd, Even, Mark or 
Space. 

Stop Bits controls the number of bits to indicate the end of a character. Options include 
1, 1.5 and 2. (1.5 bits is only valid when 5 data bits is selected, which is rare. The 2 stop 
bits setting is only valid when 6, 7 or 8 data bits is selected.) 

 

The Default Gateway address sets the default route to remote networks, enabling users 
to access the Modbus gateway from outside the local network.  

 

DHCP (Dynamic Host Configuration Protocol) is a protocol used on special servers 
that supply IP addresses to network nodes on request.  

When DHCP is enabled on the Modbus gateway (factory default), on power up it sends a 
DHCP request to the DHCP server, which assigns a dynamic IP address, subnet mask, 
and default server to the Modbus gateway.  

When DHCP is disabled (static IP addressing), the IP Address, Subnet and Default 
Gateway fields must be set manually by entering the appropriate addresses in these fields. 
If you do not know what addresses to use in these fields, ask your network administrator.