AB CompactLogix Ethernet Advanced
Review the following information for setting up and configuring the AB CompactLogix Ethernet Advanced driver.
This driver can be used for better performance. Multiple tags that belong to the same polling cycle can be read in a single request/response.
Notes:
- The maximum-length custom string that the driver can read as a string is 480 characters.
- This driver provides faster performance over other compatible drivers. If you prefer stability over speed, you can use AB CompactLogix Ethernet FreeTag.
The driver implements two modes: Symbolic and CompactLogix.
In Symbolic mode, the driver supports both CompactLogix and ControlLogix connections. This mode makes tag grouping more efficient compared to the standard driver by trying to combine as many tags as possible but not exceeding the maximum transmission unit (MTU) size for both requests and responses. Compared to CompactLogix mode, it performs better when dealing with PLC changes.
In CompactLogix mode, only CompactLogix connections are possible. The driver uses numeric handles instead of symbolic names. Usually this allows the reading of more tags per single request compared to Symbolic mode, especially if symbolic names are quite long. Compared to Symbolic mode, it performs better overall without taking into account PLC changes.
The driver does not detect PLC program changes. Structure templates are read once when a connection is established. If the PLC program is changed, you need to restart the connection.
Compatibility parameter | Compatible items |
|---|---|
Driver type | Ethernet |
Validated devices/series | When configuring tags for this driver, you must enter the case-sensitive register name exactly as it is defined in the PLC. See the Free Tags section below to learn more. |
To set up and configure this device in Litmus Edge, you will need to do the following:
- Step 1: Set up and Configure the PLC Device
- Step 2: Set up the PLC Device in Litmus Edge DeviceHub
- Step 3: Configure the List of Registers
If the device is configured for Ethernet access, find its network parameters. Otherwise, use PLC software on your computer to configure the device for Ethernet access.
Parameter | Value |
|---|---|
Type | Allen-Bradley |
Driver | AB CompactLogix Ethernet Advanced |
Network Address | The device address you defined in Step 1 |
Network Port | 44818 |
Access Mode | Select Symbolic or CompactLogix |
Slot Number | 0 |
- bool
- byte
- sint
- int
- dint
- real
- dword
- lint
- lreal
- string