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4 SAFETY FB SPECIFICATIONS
4.14 M+SF_TSSEN_R
■ Output labels
FB details
Type 2 ESPE shall have a means of periodic testing to detect a hazardous fault (e.g., loss of sensing unit detection capability,
response time exceeding that specified).
The test shall verify that each light beam operates in the manner specified by the supplier. The test signal shall simulate the
actuation of the sensing device and the duration of the periodic test shall not exceed 150ms. The upper limit of test time is set
by the i_dTestTime parameter, and the FB monitors the test time and detects an error.
No. Variable name Data type Default value Description
(9) o_bReady Bit OFF Status of whether the safety FB is activated or not.
For details, see the following.
Page 11 General Functions
(10) o_bS_OSSD_Out Bit* OFF Safety output indicating the status of the ESPE.
OFF: The sensor has a safety-related action request or test error.
ON: The sensor has no safety-related action request and no test error.
(11) o_bS_TestOut Bit* ON Coupled with the test input of the sensor.
OFF: Test request issued
ON: No test request
(12) o_bTestPossible Bit OFF Feedback signal to the process.
OFF: An automatic sensor test is not possible.
ON: An automatic sensor test is possible.
(13) o_bTestExecuted Bit OFF A positive signal edge indicates the successful execution of the automatic sensor test.
OFF: An automatic sensor test was not executed yet, an automatic sensor test is
active, or an automatic sensor test was faulty.
ON: A sensor test was executed successfully.
(14) o_bError Bit OFF Error flag.
For details, see the following.
Page 11 General Functions
(15) o_wDiagCode Word [signed] 0 Diagnostic code.
For details, see the following.
Page 11 General Functions
• Use safety data for connecting the variable whose data type is "Bit*" to input-output circuits.
• A safety program is executed as a fixed scan execution type program.
• A safety program is executed at a fixed cycle according to a set safety cycle time. The safety FB that monitors the time must meet the following requirements.
⋅ The timeout processing may be delayed by the safety cycle time by executing the safety program. Set the safety cycle time so the delay by the safety
cycle time does not pose a hazard.
⋅ If the program is executed exceeding the safety cycle processing time, the timeout may be delayed. Ensure that an abnormality does not occur during
operation.
• The ESPE must be selected in respect of the product standards IEC 61496-1, -2 and -3 and ISO13849-1.
• In order to use this FB, the ESPE shall be provided with suitable input facilities (e.g., terminals) and the test functions.
• Perform the sensor test at appropriate intervals on applications.
WARNING
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