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5 SAFETY APPLICATION CONFIGURATION EXAMPLES
5.1 System Configured by a Safety CPU
■Example of program using safety FBs
• Safety FBs to be used
For details on the safety FBs, refer to the following.
MELSEC iQ-R Safety Function Block Reference
Name Function Description
M+SF_ESTOP_R Emergency stop This FB is a safety-related FB for monitoring an emergency stop button. This FB can be used for emergency
switch off functionality (stop category 0).
M+SF_EDM_R External device monitor This FB controls a safety output and monitors controlled actuators, e.g. subsequent contactors.
(0) to (5) This is a circuit to release the interlock when a communication or I/O error occurs on the safety remote I/O station.
(8) This is a circuit to convert the reset input bit of M+SF_EDM_R.
(16) This is a circuit to monitor the status of the emergency stop switch. The safety FB is enabled by activating the reset switch after the system is
powered on or after the emergency stop switch is activated and the safety output is turned off.
(39) This is a circuit to monitor the contact welding in the safety relay. The safety output of the safety FB is turned on again by activating the start
switch after the enable status is confirmed. Activate the reset switch to clear an error occurred in the safety FB.
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