5 SAFETY APPLICATION CONFIGURATION EXAMPLES
5.1 System Configured by a Safety CPU
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In this example, the guard status (open or close) is monitored using one safety switch. The input signals of M+SF_GMON_R
(i_bS_GuradSwitch1 and i_bS_GuradSwitch2) are connected to the same signal for opening/closing the guard (SA\X0 or
SA\X1) of the safety switch.
In addition, the set value of the input signal, i_dDiscrepancyTime, is 0 so that an error occurs immediately after a doubling
input discrepancy is detected between i_bS_GuradSwitch1 and i_bS_GuradSwitch2. (Since i_bS_GuradSwitch1 and
i_bS_GuradSwitch2 are connected to the same signal, doubling input discrepancies actually do not occur.)
When using two safety switches to monitor the guard status, connect the input signals, i_bS_GuradSwitch1 and
i_bS_GuradSwitch2, to two different signals of two safety switches. Connect the constant in increments of 10ms to the input
signal of M+SF_GMON_R (i_dDiscrepancyTime) as the allowable discrepancy time between i_bS_GuradSwitch1 and
i_bS_GuradSwitch2. (Example: To set five seconds, connect the constant, K500.)
■Timing chart
Reset switch (reset_in)
M+SF_EDM_R reset input (SA\M3)
Safety refresh communication
status (SA\SD1008.0)
Safety switch (SA\X0)
M+SF_GMON_R safety output
(SA\M1)
Start switch (start_in)
Interlock status (SA\SD1232.0)
Interlock release request
(SA\SD1240.0)
Stop switch (stop_in)
Safety relay output (SA\Y0)
Safety relay output check (SA\X2)
Stop switch
pressed
CCIEF
remote (1)
error
M+SF_EDM_R Error output
(SA\M2)
Guard
opened
Guard
closed
Reset
switch
pressed
Start
switch
pressed
When the reset switch is pressed,
the M+SF_GMON_R safety output
(SA\M1) is turned on, enabling the
M+SF_EDM_R.
When an error occurs in a safety remote
I/O module, inputs and outputs of the
safety remote I/O module are turned off.
Also, the M+SF_GMON_R and
M+SF_EDM_R are disabled.
When the start switch is
pressed, the M+SF_EDM_R
safety output is turned on
and the safety relay output
(SA\Y0) turns on.
When the stop
switch is pressed,
the M+SF_GMON_R
is disabled.
A safety remote I/O module
detects a double input
discrepancy.
Stop
switch pressed
Contact welding
detected in the
safety relay
Reset
switch
pressed
Reset
switch
pressed
Start
switch
pressed
Start
switch
pressed
Start
switch
pressed
Reset
switch
pressed
Reset
switch
pressed
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