Overview

This topic describes the attributes related to the DHCP service.

DHCP Server (Address Server) Category

Attribute

Description

Enabled

When the check box is cleared (false), the DHCP server service of the module is disabled.

NOTE: When the attribute is not present, the module provides the DHCP server service to any client device that is configured to subscribe to the service of this module. The service can be disabled in the SECURITY tab.

DHCP Name

Path and name of the interface of the device that provides the DHCP server service.

The attribute is available only when Enabled is selected.

NOTE: You can see the list of modules in the DHCP VIEW .

DHCP Prefix

Editable prefix that is used to create the DHCP identifier of certain modules whose DHCP server is the M580 CPU module.

The prefix must satisfy the following rules:

  • 3 characters maximum.

  • Can contain only letters and numbers.

  • Cannot consist of the letter C (or c) followed by two digits.

Default value:

  • For a standalone M580 PAC: Mx8

  • For a redundant M580 PAC: M58

DHCP Client Category

Attribute

Description

Enabled

When the check box is selected (true), the device can subscribe to a DHCP server service.

NOTE: For certain devices, it is selected by default and read-only (for example, CRA adapter modules).
NOTE: The other attributes of this category are available only when Enabled is selected.

DHCP Server Name

Name of the device and its interface that provides the DHCP server services.

Select a value from the list of devices and their interface that exist in the system project and feature a DHCP server service, whether it is enabled or not.

NOTE: For certain devices, the attribute value is predefined and read-only (for example, CRA adapter modules).

Protocol

Indicates the protocol that the device supports.

Possible values:

  • DHCP

  • BOOTP

NOTE: The possible values depend on the type of device and/or the value of Identified by .

Identified by

Indicates how the DHCP server identifies the device:

  • By MAC address

  • By device name (identifier)

NOTE: The possible values depend on the type of device.

Identifier

Enter the appropriate value depending on the setting that you have selected for Identified by . The software accepts only unique identifiers for a given PAC.

For certain modules the software accepts only values that comply with module-specific format requirements. Refer to the manual of the module for details.

For the following modules, the identifier must be in the format [DHCP Prefix][Controller]_[Slot]_[Part Number] where:

  • [DHCP Prefix] is the prefix of the M580 controller.

  • [Controller] is 0 for an M580 standalone and A or B for a redundant controller. The same convention applies to M580 safety controllers.

  • [Slot] is the slot number of the backplane where the module is installed.

  • [Part Number] is the part number of the module.

Modules:

  • BMEAHI0812 and BMEAHO0412

  • BMECXM0100

  • BMENOS0300

  • BMENUA0100

  • BMEPXM0100

  • BMESWT0100

When a device is identified by MAC address, the attribute is read-only and the value provided by the MAC Address attribute.

The attribute cannot be left blank when Enabled is selected.

NOTE: For PMEPXM0100 modules and TeSys devices, the value must not exceed 16 characters.
NOTE: For certain devices, the attribute is predefined and read-only.
NOTE:

For CRA adapter modules the device name includes a 3-digit number (for example, by default, 001 in PCRA_001_0 for a BMECRA31310 adapter module located in drop 1).

The initial value of the 3 digits is based on the configuration of their Device Name in Control Expert Editor when you add the drop. Thereafter, you can only edit the 3 digits by using the Identifier attribute.

Verify that the setting of the rotary switches on the physical CRA adapter module always matches these 3 digits. The first two digits represent the Tens and the third digit the Ones rotary switch.

This 3-digit number also appears after the name of the drop containing the CRA adapter module.