Program Example; Additional Notes - ABB AC500-S Safety User Manual

Table 95: Hidden interface of FB instances towards drives (vendor specific)
Name
SF_SafeStop1_1
Table 96: Local variable
Name
S_EStopOut
InputDevice1_active
InputDevice2_active

7.2.4 Program example

Two channe l line m onitoring:
This FB produ ces a single SAFEBOOL
signal out of t he t wo sepa rated signals from
the em ergency stop channe ls. The
D isc repancy Tim e is set constantly t o 10 m s
InputDevice1_active
Activate
S1 _S_ EStopIn_ 1 S _Chan nelA
S1 _S_ EStopIn_ 2 S _Chan nelB
T#10m s S _Discrepan cyTim e
InputDevice2_active Activate
S2_S _ESPE _In S_ ESPE_ In
S_ StartR eset
FALSE
FALSE S_ AutoReset
S0_ Reset R eset
ESPE : This FB han dles the light curtain
interface. After intrusion in t he protected
field, as well as aft er power up the safety
output is only released after m anual restart.
This beha vior is enab led by setting t he
S_StartReset and S_AutoR eset inputs to
FALSE.
Fig. 128: Program example - emergency stop with safe stop and equivalence monitoring

7.2.5 Additional notes

This example uses different reset signals to acknowledge the emergency stop and to acknowl-
edge the monitoring violation of the drive. If the safety requirement specification of the applica-
tion allows the acknowledgment of both situations with the same signaling device, the identical
signal from the functional application may be used to reset the FB SF_EmergencyStop_1 as
well as to reset the FB SF_SafeStop1_1.
Information on The representation of the diagnostics concept is for information only. For the safety functionality,
the diagnostics the dedicated safety inputs and outputs shall be used.
concept
2020/06/19
Description
Connection to Drive 1
Data type Description
BOOL Emergency stop request
BOOL Status of the relevant input device as provided by the system
BOOL Status of the relevant input device as provided by the system
SF_Equ ivalen t _ 1
SF_Equivalent
Ready
S_ EquivalentOut
Error Error _Equiv 1
DiagC ode
Diag _Equiv1
SF_ESPE _1
SF_ESP E
Ready
S_ESPE _Out
Error
Error_ESPE 1
D iagCode
D iag_ESPE 1
S_EStopOut
3ADR025091M0208, 12, en_US
Example 1: diagnostics concept > Additional notes
Em ergen cy Stop with restart inhibit:
This FB handles t he em ergency stop
cond ition . After t he em ergency stop request
as w ell as after power up t he safety output
is only released aft er m anu al restart. This
beha vior is enabled by setting t he
S_ StartReset and S_Au toReset inputs t o
FALSE .
SF_Eme rgen cyStop_1
SF_Emerge ncyStop
Activate
S_EStopIn S_EStopOut
FALSE
S_StartR eset
FALSE
S_AutoReset
S 0_R eset Reset
AND
Safe Stop 1 Request H andling:
This FB handles t he Safe Stop 1 Request
for AxisID_1 and m onitors t hat the axis
follows t he request w ithin the predefined
m onitoring tim e of 100 m s. Any error
condition within t he axis has to be
acknowledg ed by a m anual drive reset
signal .
SF_SafeStop1_1
SF_SafeStop 1
Activate
AND
S_S topIn
AxisID_1 AxisID
T#100 m s
M onitoringTim e
S 3_D rive_Reset Reset
Safety application examples
Ready
S_E StopOut
Error Error _EStop1
D iagCode
Diag_E Stop 1
Ready
S _Stopped
S_Stopp ed
Error _SafeStop 1
Error
D iagCode
D iag _SafeStop1
345