Description

Function description

The SAFETY_MONITOR_V2 DFB allows data processed by the safety monitor to be obtained. It cannot be used to control the AS-i bus or its blocks.

The DFB can manage up to 48 devices and supports either sorting according to OSSDs or the display of all devices.

It can be programmed in any program module (Main, SR or section).

It is dedicated to a single safety monitor.

Additional parameters and can be configured.

Rules

For reasons of performance, we recommend running the SAFETY_MONITOR_V2 in the MAST task.

We strongly recommend programming only 1 instance of SAFETY_MONITOR_V2 in your project.

The following conditions are mandatory in order to run SAFETY_MONITOR_V2:

The DFB can be programmed in the various tasks (with the exception of the event tasks) and in the sections of the project.
The DFB must be called (the program element to which it is assigned must be run).
The Enable input must be set to 1.
The Output_Sorted input must be set accordingly (output sorted or not sorted).
The AS-i Monitor must be configured in Control Expert.

Representation in FBD

Representation:

Representation in LD

Representation:

Representation in IL

Representation:

CAL SAFETY_MONITOR_V2_Instance (IO:=I0_Input, I1:=I1_Input, I2:=I2_Input, I3:=I3_Input, Enable:=Enable_Output, 
Q0:=Q0_Output, Q1:=Q1_Output, Q2:=Q2_Output, Q3:=Q3_Output, Output_Sorted:=Sorted, Error=>Error_Output, Running=>Running_Output)

Representation in ST

Representation:

SAFETY_MONITOR_V2_Instance (IO:=I0_Input, I1:=I1_Input, I2:=I2_Input, I3:=I3_Input, Enable:=Enable_Output, 
Q0:=Q0_Output, Q1:=Q1_Output, Q2:=Q2_Output, Q3:=Q3_Output, Output_Sorted:=Sorted, Error=>Error_Output, Running=>Running_Output);

Description of parameters

The following table describes the input parameters:

Parameter	Type	Description
I0	EBOOL	Input variable 0
I1	EBOOL	Input variable 1
I2	EBOOL	Input variable 2
I3	EBOOL	Input variable 3
Output_Sorted	BOOL	Bit = 1: Diagnostics sorted according to OSSDs (no preprocessing) Bit = 0: Diagnostics of all devices

The following table describes the input/output parameters:

Parameter	Type	Description
Enable	EBOOL	Bit = 1: Activate DFB (cold start) Setting this bit to 1 will execute the DFB, enabling information to be processed. Information can only be processed if Enable = 1 Bit = 0: Deactivate DFB. The bit is set to 0 by the DFB at time-out.
Q0	EBOOL	Output variable 0
Q1	EBOOL	Output variable 1
Q2	EBOOL	Output variable 2
Q3	EBOOL	Output variable 3

The following table describes the output parameters:

Parameter	Type	Description
Error	EBOOL	Bit = 1: DFB or safety bus fault (At least 1 slave faulty). Note: DFB error (Enable = 0 and Dfb_err = 1)) A DFB error will invalidate safety project data. Bus error (Enable = 1 and Dfb_err = 0)) In the event of a device error in the safety project, the faulty addresses will be displayed in the public ARRAY variable Device.Device_error.
Running	EBOOL	Bit = 1: DFB running

Internal Public variables

The following table describes the internal public variables:

Name	Type	Description
Abort	EBOOL	If this bit is set to 0 in one cycle and to 1 in the next cycle, all exchanges between the CPU and the Safety Monitor will be aborted. The DFB will reinitialize and all internal data of the DFB will be set to 0.
Timeout	INT	Time-out during data exchange If the DFB does not receive a correct data set before this time elapses, transmission will be aborted, the DFB deactivated and the Error output will be set to 1 (Dfb_stat and Dfb_err are updated).
Moni_err	EBOOL	Bit = 1: Monitor error
Out_1	EBOOL	Bit = 1: 1. OSSD (OUT1) activated
Out_2	EBOOL	Bit = 1: 2. OSSD (OUT2) activated
Device.Device_ready	ARRAY[0..47] OF BOOL	Device ready Each index corresponds to the index of the safety device which is ready but still in test mode or waiting for another condition such as local acknowledgment, the activation of the Start button, etc.
Device.Device_off	ARRAY[0..47] OF BOOL	Device deactivated Each index corresponds to the index of the deactivated safety device. Note: Deactivated devices (including NOPs) set to FALSE are also transmitted as Device_off!
Device.Device_error	ARRAY[0..47] OF BOOL	Device error Each index corresponds to the index of the faulty safety device.
Device.Device_noCom	ARRAY[0..47] OF BOOL	Device not communicating Each index corresponds to the index of the safety device which is not communicating on the AS-i bus.
Device.Device_allocation	ARRAY[0..47] OF INT	Device receiving instruction Each index corresponds to the index of the safety device. An integer value corresponding to the processing loop is assigned to the safety device. 1 = 1st OSSD 2 = 2nd OSSD 3 = Preprocessing (only appears in the event of an error; at all other times, 0 is displayed.) 4 = Both OSSDs Note: This information is only transmitted if Output_Sorted is set to 0!
Dfb_stat	STRING	DFB processing status in plain text
Dfb_err	INT	Indicates the following error types: 16#90: The response sent by the Monitor is invalid. 16#91: Data exchange has been aborted by the user. 16#92: The exchange has been aborted due to time-out, the DFB is unable to receive data.