S_EStopIn input
This state-controlled input evaluates the state of an emergency-stop control device (activated or not activated) connected to the function block.
Data type: SAFEBOOL
Initial value: SAFEFALSE
Connection: Connect this input to an emergency-stop control device connected to the Sicherheitssteuerung, either directly or via other 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 emergency-stop control device is not activated (normal operation). Refer to the warning below this table. |
SAFEFALSE | The emergency-stop control device is activated (or the wiring to the emergency-stop control device is interrupted or the emergency-stop control device is inoperable). The S_EStopOut output is switched to SAFEFALSE. |
You can set a restart inhibit via S_AutoReset in order to control the restart behavior of the function block following a signal change from SAFEFALSE to SAFETRUE at the S_EStopIn input (i.e., after the emergency-stop control device has been deactivated).
If no start-up/restart inhibit has been specified for the function block, the SAFETRUE status at the S_EStopIn input can cause the S_EStopOut output to immediately switch to SAFETRUE.
WARNUNG
|
Unintended start-up If no start-up/restart inhibit is specified:
|
Single-channel or two-channel connection of the emergency-stop control device?
Regardless of whether there is a single-channel or two-channel connection between the emergency-stop control device and the Sicherheitssteuerung, the S_EStopIn input is only connected to one signal of the emergency-stop control device.
When using a two-channel emergency-stop control device, the two-channel signal must be evaluated or monitored as follows:- Either through a suitable upstream function block, e.g., SF_Equivalent function block, if the emergency-stop control device has two N/C contacts.
- Or the evaluation of equivalence or antivalence must be performed in the safety-related input device (also see section application example).