S_OSSD_In input
State-controlled input for the status of the connected safety-related sensor.
This input processes the status signal of the safety-related sensor (normal operation, test or request for the safety-related function). The signal present must be SAFETRUE so that the safety-related S_OSSD_Out output can be switched to SAFETRUE.
Data type: SAFEBOOL
Initial value: SAFEFALSE
Connection: Connect this input to the signal of a safety-related sensor (ESPE type 2) connected to the Safety PLC, either directly or via additional safety-related functions/function blocks. Constant SAFETRUE or SAFEFALSE values are not permitted.
If the function block is activated (input Activate = TRUE), the possible values at this input lead to the following function block behavior:
| Value | Description |
|---|---|
| SAFETRUE | The light beam of the safety-related sensor is not interrupted.Refer to the warning below this table.The safety-related sensor is in normal operation, which means that no tests are active and the safety-related function has not been requested. The S_OSSD_Out output is switched to SAFETRUE provided that the function block has not detected any errors. |
| SAFEFALSE | The safety-related sensor is either in the process of performing a test or the light beam of the safety-related sensor is interrupted. The SAFEFALSE value can also indicate that a safety-related sensor is either disabled or inoperable. |
If no start-up inhibit is specified for the function block, the SAFETRUE status at the S_OSSD_In input can cause the S_OSSD_Out output to immediately switch to SAFETRUE.
|
WARNING
|
| Unintended start-up If no start-up inhibit is specified:
|