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4 FUNCTIONS
4.1 List of Functions
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4
4
FUNCTIONS
This chapter explains the details of functions that can be used for a safety extension module, and their setting methods.
For details on the buffer memory, refer to the following:

Page 136 Buffer Memory
4.1
List of Functions
The following lists the functions of a safety extension module.
Categor
y Item Description Reference
Safety
control Built-in program selection
function To select a built-in program to run using the rotary switch(es) on the front of
a module. Page 40 Built-In Program
Selection Function
Off delay delay setting
function To set off delay time to a desired output using the rotary switch on the front
of a module. Page 68 Off Delay Delay Setting
Function
Muting function To temporarily disable the protection function of a safety device. Page 70 Muting Function
AND link To activate the logic path of safety functions according to the input from an
FX5-SF-8DI4. Page 72 AND link
OR link To bridge logic path A or B of safety functions according to the input from an
FX5-SF-8DI4. Page 74 OR link
Bypass To bridge logic path A or B of safety functions according to the input from an
FX5-SF-8DI4, and forcibly turn ON the safety output for 60 seconds. Page 76 Bypass
Restart interlock To prevent a system from restarting until safety is verified and a reset signal
is input after safety outputs are turned OFF. Page 77 Restart Interlock
External device monitoring
(EDM) To monitor if a contactor is OFF when the module is reset. Page 78 External Device
Monitoring (EDM)
Retriggering of the delayed
OSSDs To reset a delay time to keep a machine operating when safety inputs are in
the safe state by the time off delay time elapses. Page 79 Retriggering of the
Delayed OSSDs
ENABLE input (XS0 terminal) XS0 is a terminal to enable safety outputs. The terminal can be used to
cascade safety circuits. Page 80 ENABLE Input (XS0
Terminal)
Two-hand operation/jog mode To control a safety system using a two-hand control device connected to an
FX5-SF-MU4T5.
Jog mode limits the duration time that keeps safety outputs Q2 and Q3 ON
for five seconds by the operation of a two-hand control device. Page 81 Two-Hand Operation/Jog
Mode
Diagnosis Error history function To store the history of errors occurred in a safety extension module to the
buffer memory. Page 82 Error History
Safety information monitoring
function To store information including the I/Os, settings, and error codes of a safety
extension module to the buffer memory.
The safety information can be referenced by user programs and built-in
functions (such as Web server) of a CPU module or the monitoring screen
of GX Works3. Page 85 Safety Information
Monitoring Function