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Version: 8.3 Beta 🚧

Connecting to SLC

note

This driver supports SLC 5/05 and compatible SLC processors using CSP or Ethernet/IP protocols.

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Connecting to SLC

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Connect to an SLC Device

This driver requires the OPC UA module to be installed and enabled. If the module is missing or disabled, the device will fault with a “Missing Dependency” error on the Platform System > Modules page.

  1. On the Gateway, go to Connections > Devices > Connections.

  2. Click Create Device Connection +.

  3. Select Allen-Bradley SLC and click Next.

    note

    SLC PLCs do not have built-in Ethernet. Use a 1761-NET-ENI, ENBT, or similar device to enable communication.

  4. On the Configure Device screen, enter the required fields:

    • Name: SLC
    • Hostname: IP address of the device (e.g., 10.20.4.56)

  5. Click Create Device Connection.

The device will be listed now on the Connections page. The status will initially show Disconnected, but will move to a Connected state.

Device Connection Settings

Main Settings

NameDescription
NameA user-defined name for the device. This name appears in OPC item paths and the Devices list. Name must begin with an underscore or a letter, and cannot include special characters.
DescriptionOptional description to help identify the device.
EnabledWhen selected, the device is active and available for use.

Connectivity Settings

NameDescription
HostnameThe Hostname value is the IP Address of the SLC processor. The protocol that the SLC processor supports is automatically detected. It will use either CSP protocol on port 2222 (0x8AE) or EthernetIP protocol on port 44818 (0xAF12).
Local AddressThe local address to connect from when establishing a TCP connection. If left blank, then the driver will select an available address.
TimeoutThe maximum amount of time to wait, in milliseconds, for responses from the processor.
Connection PathThe Connection Path value is used to define the route of the PLC-5 processor to connect to. [Optional] See Connection Path Format for more details.

Advanced Settings

NameDescription
Disable Processor BrowseDisables processor browse setting.
Zero TNS ConnectionDisables the Zero TNS connection setting.
Browse Cache TimeoutThe amount of time, in milliseconds, to cache tag structure results read from the device.

Connection Path Format

If the SLC is connected over DH+ through a 1756-DHRIO module, use the following format for Connection Path:

1,<DHRIO slot number>,<DHRIO channel>,<DH+ node number>

  • 1: Indicates a transition to the ControlLogix backplane
  • DHRIO slot number: Slot number of the 1756-DHRIO module (0–16 depending on chassis)
  • DHRIO channel: Use 2 for Channel A or 3 for Channel B
  • DH+ node number: Octal value of the SLC node, matching its configuration

Supported SLC Connection Methods

  • SLC 5/05 direct over Ethernet
  • SLC 5/03, 5/04, 5/05 via 1761-NET-ENI
  • SLC 5/04 via 1756-DHRIO
  • SLC 5/03, 5/04, 5/05 via Spectrum Controls WebPort 500