Configuring IP Addresses for an M580 Hot Standby System
Original instructions
About us
Introduction
This topic shows you how to assign IP addresses to an M580 Hot Standby system. For information on how to configure other Ethernet communication settings for the CPU, refer to the M580 Hardware Reference Manual.
Accessing the M580 CPU Hot Standby Animation task Tab
Use the IPConfig tab of the EIO configuration window for an M580 BMEH58•040 or BMEH58•040S CPU to assign IP addresses. To access this tab:
Step
Action
1
Add a BMEH58•040 or BMEH58•040S CPU to your project.
2
In the Project Browser, navigate to and select Configuration → PLC Bus → <rack> → <CPU> → EIO.
3
Click the right mouse button, then select Open.
4
Click the IPConfig tab.
Assigning IP Addresses to Modicon M580 BMEH58•040 or BMEH58•040S CPUs
An M580 Hot Standby system requires the assignment of three IP addresses. In addition, Control Expert automatically creates and assigns a fourth IP address. IP address settings include:
IP address name
Description
Main IP address
The configurable IPv4 IP address used by the primary CPU for communication with distributed equipment.
NOTE: Because this setting is always assigned to the primary CPU, it can be associated with either the A or B CPU. When a switchover occurs (for example, when CPU B becomes primary) the main IP address assignment is transferred from CPU A to CPU B.
Main IP address + 1
The Control Expert auto-generated IPv4 IP address used by the standby CPU for communication with distributed equipment. This auto-generated IP address equals the Main IP address plus 1 in the fourth octet. For example, if the Main IP address is 192.168.10.1, this auto-generated IP address is 192.168.10.2.
NOTE:
  • This IP address is not editable in Control Expert. Its sole purpose is to provide seamless communication transitions on Hot Standby CPU switchovers.
  • Avoid assigning this IP address (the Main IP address + 1) to any device that may communicate with the Hot Standby system. If you do assign this IP address to another device, a duplicate IP assignment condition may occur.
IP address A
The configurable IPv4 IP address for the CPU with its A/B/Clear rotary selector switch set to “A”. CPU A uses this IP address for communication on the Ethernet RIO network.
IP address B
The configurable IPv4 IP address for the CPU with its A/B/Clear rotary selector switch set to “B”. CPU B uses this IP address for communication on the Ethernet RIO network.
Subnetwork mask
The configurable 32-bit value used to identify both the network address and the subnetwork portion of the IP address.
Gateway address
The configurable IP address of the default gateway to which messages for other networks are transmitted.
NOTICE
UNINTENDED EQUIPMENT OPERATION
Do not assign an IP address equal to the Main IP Address, the Main IP Address + 1, IP Address A, or IP Address B to any Ethernet device that may communicate with the Hot Standby system. A duplicate IP address condition, causing unintended equipment operation, can occur.
Failure to follow these instructions can result in equipment damage.
Editing IP Address Settings for Adapter Modules
From the IPConfig tab, you can access IP address settings for (e)X80 EIO adapter modules. Click on the Update CRA IP address configuration link to open the Ethernet Network Manager, which lists adapter modules on connected Ethernet networks.
In the Ethernet Network Manager, you can edit the following settings for each adapter module: