Step 2.5: TwinSafe PLC Start / Stop / ErrAck
The example shows how the TwinCAT variables are linked to an AMK controller. Thus the AMK controller can start the TwinSAFE PLC.
ERR Ack = low - high - low edge
RUN/STOP = low - high edge
|
|
Not applicable at TwinCAT PLC and TwinSAFE PLC combination. |
The example shows the preparation for a standard data exchange between AMK controller and TwinSafe PLC. With the variables, the TwinSAFE PLC can be controlled with the AMK controller. The TwinCAT PLC (dummy) variables (by_IN_Data_0 and by_OUT_Data_0) will be linked with the TwinSAFE PLC control and status in- and outputs. The bit numbers will be entered with an offset value.
Example:
| Signal / Status | Variable |
|---|---|
| ERR Ack | by_OUT_Data_0 Offset 0 (bit 0) |
| RUN / STOP | by_OUT_Data_0 Offset 1 (bit 1) |
| FB ERR | by_IN_Data_0 Offset 0 (bit 0) |
| COM ERR | by_IN_Data_0 Offset 1 (bit 1) |
|
|
You can find the used variables in the device tree. Below the clamp 'EL6900' – 'Module 2 (FSOE). TwinCAT use standard names like 'Standard Out Var 1', 'Standard Out Var 2' … . Rename the standard variable names to a clear name. This variable name will further be also used for the TwinCAT ‘configuration file’. This 'configuration file' will be read from AIPEX PRO to create the EtherCAT configuration file. |
