User manual

Chapter 4 Configuration
Page 117 ©February 2009
255) separated by periods, where each integer represents the binary value of one byte in the IP
address. This is called dotted-decimal notation. Example: 169.254.100.175
Subnet Mask
An IP Address is divided into two main parts subnet ID and host ID. All devices on the same
local network must have the same subnet ID, but a unique host ID. To separate these two parts a
subnet mask is used. In its simplest form, the subnet mask is a four byte pattern where a value of
255 allocates the corresponding byte of the IP Address to the subnet ID, and a value of 0
allocates the corresponding byte of the IP Address to the host ID.
For example, a common subnet mask is shown in the example below. Looking at the IP Address
located directly above the Subnet Mask in this example, it can be seen that the IP Address values
directly above a subnet mask value of 255 correspond to the subnet ID. Conversely, the IP
Address values directly above a subnet mask value of 0 correspond to the host ID. So, in this
example, the subnet ID is 169.254.100 and the host ID is 175.
Special case IP addresses
Devices on an Ethernet network are not allowed to be configured to the following IP addresses;
therefore do not configure the module to use any of them.
0.x.x.x - IP address where the first byte is zero 127.x.x.x - IP address where the first byte is 127
x.x.x.0 - IP address where the last byte is zero x.x.x.255 - IP address where the last byte is 255
Gateway
The Gateway IP is the IP address of the LAN server or the host device.
Connect Timeout
The Connect Timeout parameter in the IP addressing section of the display refers to the IP
functionality of the module. If an IP connection to the module has not been active for this
amount of time, the 105G will timeout and disconnect that connection. Note that there can be
several active connections at the same time - only the inactive connection will be disconnected.
Enable Ethernet Debug
Select this box if you wish to enable Ethernet Diagnostics on the 105G via configuration
software (see section 6.3 for details). For security reasons, disabling this option will disallow all
Ethernet diagnostics functions accessible to configuration software, and can only be reactivated
via serial port configuration.
4.12.2 Modbus TCP
To use Modbus TCP, select the Enable Modbus Server box and deselect the Enable Ethernet/IP
box. This will automatically remove the “I/O Instance” selection for all fieldbus mappings. It is
possible for both Modbus TCP and Ethernet/IP to be selected - in this case, select “Disable I/O
Instance” individually for each Modbus TCP fieldbus mapping.
Supported Commands:
Functio
n Code
Function Name Class Affects Area Address
Method
1 Read coils 1 IN/OUT Bit