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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_GLOCK_R Guard lock and
interlocking
This FB controls an entrance to a hazardous area via an interlocking guard with guard locking ("four state
interlocking").
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) to (20) This is a circuit to check the safety switch interlock release request and conditions for the interlocking after the safety output is turned off.
(32) This is a timer to delay the start of communications until M+SF_GLOCK_R is enabled after the normal communications are established on the
safety remote station.
(37) This is a circuit to monitor the safety switch status. The safety FB is enabled by activating the reset switch after the system is powered on or
after the safety switch is activated and the safety output is turned off.
(71) This is a circuit to monitor the contact welding in the electromagnetic contactors. 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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