BK20x0 (Lightbus)
The Bus Couplers BK20x0 and Bus Terminal Controller BC2000 are used for Beckhoff Lightbus. Those specific properties which distinguish them from other Bus Couplers are described below. For an Overview of all currently supported Lightbus Bus Couplers BK2xx0, please see...
”BK2xx0” tab
2 Byte PLC interface: Once selected, one input and output variable for each 2-byte PLC interface is inserted below the coupler.
Check Terminals at StartUp: If you select this option (available only when the 2-byte PLC interface is active), compares the configured terminals with those physically present on the coupler during the system StartUp phase. If differences are detected, the system StartUp will be cancelled with a corresponding message.
Check State while Online: If selected, the status byte for the Bus Coupler (Address =0xFF) is evaluated and a corresponding logger entry is created if errors occur.
Show Messagebox on Error: If selected (only possible when online status checking is activated), any errors are logged, and a message box is opened.
Generate own K-Bus update: You can influence the terminal bus update. If this update is not carried out via a C1220 broadcast, it must carry out its own K-Bus update (standard).
After own Data: The update takes place directly after transmission of its own data.
After All Data: The update takes place in the current CDL after all data has been transmitted.
Check K-Bus ready: Check if the K-Bus is ready.
Diagnostic Inputs and Outputs
Each BK2xx0 Bus Coupler has input and output bytes available for diagnostic and settings purposes:
Inputs | Description |
|---|---|
TermDiag | See also BK2000 manual |
Bit 0-7 = Terminal No | |
Bit 8-9 = Channel No | |
Bit 10-11 = Diag Code | |
Bit 12-14 = Diag Code Ex | |
Bit 15 = Fail | |
State | Content of the first byte of the word 255 from the process image of the Bus Coupler (see BK2000 manual). |
Bit 0 = Command Err | |
Bit 1 = Input Data Err | |
Bit 2 = Output Data Err | |
Bit 3 = Timeout | |
Bit 4 = K-Bus Reset Failure | |
Bit 6 = K-Bus Overrun (no function at BK2000) |
Outputs | Description |
|---|---|
TermDiag | See BK2000 manual |
Ctrl0 | Content of the first byte of the word 254 from the process image of the Bus Coupler (see BK2000 manual). |
Ctrl1 | Ctrl1: Content of the second byte of the word 254 from the process image of the Bus Coupler (see BK2000 manual). |