GE C30 Instruction Manual page 150

PRODUCT SETUP
The behavior before release 7.10 was as follows. When sending packets to EnerVista, the UR noticed that the destination
was not on a connected network and it tried to find a route to destination. Since the default route was the only route it
knew, it used it. Yet EnerVista was on a private network, which was not reachable through Router1. Hence a destination
unreachable message was received from the router.
The configuration starting with release 7.10 is as follows:
• PRT1 IP ADDRESS = 10.1.1.2
PRT1 SUBNET IP MASK = 255.255.255.0
PRT2 IP ADDRESS = 10.1.2.2
PRT2 SUBNET IP MASK = 255.255.255.0
IPV4 DEFAULT ROUTE: GATEWAY ADDRESS = 10.1.1.1
STATIC NETWORK ROUTE 1: RT1 DESTINATION = 10.1.3.0/24; RT1 NET MASK = 255.255.255.0; and RT1 GATEWAY =
10.1.2.1
The behavior since release 7.10 is as follows. There is one added static network route to the destination 10.1.3.0/24, where
a computer running EnerVista is located. This static route uses a different gateway (10.1.2.1) than the default route. This
gateway is the address of Router2, which has knowledge about 10.1.3.0 and is able to route packets coming from the UR
and destined to EnerVista.
Show routes and ARP tables
This feature is available on the Web interface, where the main menu contains an additional Communications menu and
two submenus:
• Routing Table
• ARP Table
The tables outline the information displayed when the two submenus are selected.
5
Table 5-6: Routing table information
Field Description
Destination The IP address of the remote network to which this route points
Mask The network mask for the destination
Gateway The IP address of the next router to the remote network
Interface Interface through which the specified network can be reached
Table 5-7: IP ARP information
Field
IP Address
Age (min)
Hardware Address
Type
Interface
5.3.4.8 Modbus protocol
SETTINGS  PRODUCT SETUP  COMMUNICATIONS  MODBUS PROTOCOL
 MODBUS PROTOCOL

The serial communication ports utilize the Modbus protocol, unless the port is configured for DNP or IEC 60870-5-103
operation. This allows the EnerVista UR Setup software to be used on the port. UR devices operate as Modbus slave
devices only.
For more information on the protocol, including the memory map table, see the UR Series Communications Guide.
5-32
Description
The network address that corresponds to Hardware Address
Age, in minutes, of the cache entry. A hyphen (-) means the address is local.
LAN hardware address, a MAC address that corresponds to network address
Dynamic or Static
Interface to which this address mapping has been assigned
MODBUS SLAVE

ADDRESS: 254
MODBUS TCP PORT

NUMBER: 502
CHAPTER 5: SETTINGS
Range: 0 to 254 in steps of 1
Range: 0 to 65535 in steps of 1
C30 CONTROLLER SYSTEM – INSTRUCTION MANUAL