Mitsubishi Electric MELSEC iQ-R Series Safety Function Block Reference page 26

■ Output labels
No. Variable name
(8) o_bReady
(9) o_bS_EDM_Out
(10) o_bError
(11) o_wDiagCode
WARNING
• 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.
FB details
Whether the i_bS_EDM1, i_bS_EDM2, and o_bS_EDM_Out are set to ON or OFF properly depends on the following
conditions in the table below.
Variable name
i_bS_EDM1, i_bS_EDM2
o_bS_EDM_Out
Set i_bS_EDM1 and i_bS_EDM2 to ON in the initial state. The connected actuator will be activated (o_bS_EDM_Out=ON) if
i_bS_EDM1 and i_bS_EDM2 are set to ON when i_bS_OutControl is set to ON. (The connected actuator is changed to the
error status if i_bS_EDM1 or i_bS_EDM2 is set to OFF.)
After the connected actuator is activated (o_bS_EDM_Out=ON), i_dMonitoringTime monitors that i_bS_EDM1 and
i_bS_EDM2 are set to OFF. If i_bS_EDM1 and i_bS_EDM2 are not set to OFF after the i_dMonitoringTime period, the
connected actuator will not be activated (o_bS_EDM_Out=OFF) and be changed to the error status.
After the connected actuator is not activated (o_bS_EDM_Out=OFF), i_dMonitoringTime monitors that i_bS_EDM1 and
i_bS_EDM2 are set to ON. If i_bS_EDM1 and i_bS_EDM2 are not set to ON after the i_dMonitoringTime period, the
connected actuator will be changed to the error status.
WARNING
• The actuators used in the safety function should be selected from the safety level specified in the risk analysis.
• For i_dMonitoringTime, select a proper value and verify it depending on the application of the user.
4 SAFETY FB SPECIFICATIONS
24
4.3 M+SF_EDM_R
Data type Default value
Bit OFF
Bit* OFF
Bit OFF
Word [signed] 0
Initial state (connected actuators not
activated)
ON
OFF
Description
Status of whether the safety FB is activated or not.
For details, see the following.
Page 11 General Functions
Controls the actuator. The result is monitored by feedback signals i_bS_EDM1 and
i_bS_EDM2.
OFF: Disable connected actuators.
ON: Enable connected actuators.
Error flag.
For details, see the following.
Page 11 General Functions
Diagnostic code.
For details, see the following.
Page 11 General Functions
Connected actuators activated.
OFF
ON