SF_OutControl

This is the web edition of the original ‎⮫ AC500-S safety user manual, version 1.3.2. This web edition is provided for quick reference only. The original safety user manual must be used to meet functional safety application requirements.

Standards	Requirements
IEC 60204-1:2009	9.2.2: Stop functions: Stop function categories; category 0 - stopping by immediate removal of power to the machine actuators (i.e., an uncontrolled stop ...) 9.2.5.2: Start: The start of an operation shall be possible only when all of the relevant safety functions and/or protective measures are in place and are operational except for conditions as described in 9.2.4. Suitable interlocks shall be provided to secure correct sequential starting.
ISO 13849-1:2015	5.2.1 Safety-related stop function A safety-related stop function (e.g., initiated by a safeguard) shall, as soon as necessary after actuation, put the machine in a safe state. Such a stop shall have priority over a stop for operational reasons. 5.2.3 Start/restart function A restart shall take place automatically only if a hazardous situation cannot exist. 5.2.8 Fluctuations, loss and restoration of power sources When fluctuations in energy levels outside the design operating range occur, including loss of energy supply, the SRP/CS shall continue to provide or initiate output signal(s) which will enable other parts of the machine system to maintain a safe state.
ISO 12100:2010	6.2.11.2 Starting of an internal power source/switching on an external power supply 6.2.11.4 Restart after power interruption
ISO 13849-1:2015	5.2.2 Manual reset function

Control of a safety output with a signal from the functional application and a safety signal with an optional startup inhibit.

The SF_OutControl FB is an output driver for a safety output.

The safety output is controlled via S_OutControl using a signal from the functional application (ProcessControl to control the process) and a signal from the safety application (S_SafeControl to control the safety function).

Optional conditions for process control (ProcessControl):

An additional function start (ProcessControl FALSE => TRUE) is required following block activation or feedback of the safe signal (S_SafeControl). A static TRUE signal at ProcessControl does not set S_OutControl to TRUE.
An additional function start (ProcessControl FALSE => TRUE) is not required following block activation or feedback of the safe signal (S_SafeControl). A static TRUE signal at ProcessControl sets S_OutControl to TRUE if the other conditions have been met.

Optional startup inhibits:

Startup inhibit after function block activation.
Startup inhibit after interruption of the protective device.

The StaticControl, S_StartReset and S_AutoReset inputs shall only be activated if it is ensured that no hazardous situation can occur when the PES is started.

Table 1057: FB name: SF_OutControl
Name	Data type	Initial value	Description, parameter values
VAR_INPUT
Activate	BOOL	FALSE	⮫ Table 992 “General input parameters”
S_SafeControl	BOOL	FALSE	Variable. Control signal of the preceding safety FB. Typical function block signals from the library (e.g., SF_EStop, SF_Guard, SF_TwoHandControlTypeII, and/or others). FALSE: The preceding safety FBs are in safe state. TRUE: The preceding safety FBs enable safety control.
ProcessControl	BOOL	FALSE	Variable or constant. Control signal from the functional application. FALSE: Request to set S_OutControl to FALSE. TRUE: Request to set S_OutControl to TRUE.
StaticControl	BOOL	FALSE	Constant. Optional conditions for process control. FALSE: Dynamic change at ProcessControl (FALSE => TRUE) required after block activation or triggered safety function. Additional function start required. TRUE: No dynamic change at ProcessControl (FALSE => TRUE) required after block activation or triggered safety function.
S_StartReset	BOOL	FALSE	⮫ Table 992 “General input parameters”
S_AutoReset	BOOL	FALSE	⮫ Table 992 “General input parameters”
Reset	BOOL	FALSE	⮫ Table 992 “General input parameters”
VAR_OUTPUT
Ready	BOOL	FALSE	⮫ Table 993 “General output parameters”
S_OutControl	BOOL	FALSE	Controls connected actuators. FALSE: Disable connected actuators. TRUE: Enable connected actuators.
SafetyDemand	BOOL	FALSE	Optional. ⮫ Table 993 “General output parameters”
ResetRequest	BOOL	FALSE	Optional. ⮫ Table 993 “General output parameters”
Error	BOOL	FALSE	⮫ Table 993 “General output parameters”
DiagCode	WORD	16#0000	⮫ Table 993 “General output parameters”

Typical timing diagrams

SF_OutControl_TimingDiagram_1 — Fig. 525: Timing diagram for SF_OutControl: S_StartReset = FALSE

SF_OutControl_TimingDiagram_2 — Fig. 526: Timing diagram for SF_OutControl: S_StartReset = TRUE

Error detection

The following conditions force a transition to the Error state:

Invalid static Reset signal in the process.
Invalid static ProcessControl signal.
ProcessControl and Reset are incorrectly interconnected due to programming error.

Error behavior

In the event of an error, the S_OutControl output is set to FALSE and remains in this safe state.

To leave the Reset, Init or Lock error states, the Reset input must be set to FALSE. To leave the control error state, the ProcessControl input must be set to FALSE.

After transition of S_SafeControl to TRUE, the optional startup inhibit can be reset by a rising edge at the Reset input.

After block activation, the optional startup inhibit can be reset by a rising edge at the Reset input.

Function block-specific error and status codes

Table 1058: FB-specific error codes
DiagCode	State name	State description and output setting
C001	Reset Error 1	Static Reset signal in state 8401. Ready = TRUE S_OutControl = FALSE SafetyDemand = FALSE ResetRequest = FALSE Error = TRUE
C011	Reset Error 2	Static Reset signal in state 8404. Ready = TRUE S_OutControl = FALSE SafetyDemand = FALSE ResetRequest = FALSE Error = TRUE
C010	Control Error	Static signal at ProcessControl in state 8006. Ready = TRUE S_OutControl = FALSE SafetyDemand = FALSE ResetRequest = FALSE Error = TRUE
C020	Init Error	Simultaneous rising trigger at Reset and ProcessControl in state 8401. Ready = TRUE S_OutControl = FALSE SafetyDemand = FALSE ResetRequest = FALSE Error = TRUE
C030	Lock Error	Simultaneous rising trigger at Reset and ProcessControl in state 8404. Ready = TRUE S_OutControl = FALSE SafetyDemand = FALSE ResetRequest = FALSE Error = TRUE

Table 1059: FB-specific status codes (no error):
DiagCode	State name	State description and output setting
0000	Idle	The function block is not active (initial state). Ready = FALSE S_OutControl = FALSE SafetyDemand = FALSE ResetRequest = FALSE Error = FALSE
8401	Init	Block activation startup inhibit is active. Reset required. Ready = TRUE S_OutControl = FALSE SafetyDemand = FALSE ResetRequest = TRUE Error = FALSE
8802	Safe	Triggered safety function. Ready = TRUE S_OutControl = FALSE SafetyDemand = TRUE ResetRequest = FALSE Error = FALSE
8404	Lock	Safety function startup inhibit is active. Reset required. Ready = TRUE S_OutControl = FALSE SafetyDemand = FALSE ResetRequest = TRUE Error = FALSE
8006	Output Disable	Process control is not active. Ready = TRUE S_OutControl = FALSE SafetyDemand = FALSE ResetRequest = FALSE Error = FALSE
8000	Output Enable	Process control is active and safety is enabled. Ready = TRUE S_OutControl = TRUE SafetyDemand = FALSE ResetRequest = FALSE Error = FALSE