Safety engineering
Safety functions
Cascading
1
87
EDS94AYAE EN 6.0
1.3.13.2 Conditions
ƒ This function is available from SM301 V1.1.
ƒ The SD−In4 input must be parameterised as active input for the "emergency stop"
function and the input delay for SD−In4 must be £ 10 ms.
ƒ The emergency stop function to be executed must be parameterised as STO via the
"SSE: emergency stop function" parameter.
ƒ The restart behaviour of the drive after the STO/SS1 stop function has been
executed must be parameterised to "Acknowledged restart".
ƒ The control of the SD−Out1 output via a possibly parameterised safety bus must be
inhibited.
ƒ The SS1 mode (C15306) must be set to "STO after stopping time".
ƒ The plausibility check rejects other settings until they are parameterised correctly.
Codes
Parameter: Name: Data type: Index:
C15035 CAS: Cascading
UNSIGNED_8 9540
d
= 2544
h
Safe cascading
Selection list
(Lenze setting bold) Information
0 No cascading
(As of SM301 V1.1)
4 Cascading with SD−In4
þ Read access Write access o CINH o PLC-STOP o No transfer
C15036 CAS: Stop delay
UNSIGNED_16 9539
d
= 2543
h
Circulation time of safe cascading
Display area
(min. value | unit | max. value) Information
0 MS 65535 (As of SM301 V1.1)
l Display of the time that passes from switching the
SD−Out1 output to OFF state to the detection of the
OFF state at the SD−In4 input. This information may
be helpful for system commissioning/maintenance.
l If "0 ms" is displayed after a stop, another safety
module has activated the stop via the cascade.
l The time is displayed until the next system
acknowledgement.
þ Read access o Write access o CINH o PLC-STOP o No transfer
1.3.13.3 Activation
The cascade trips with every STO, irrespective of which safety module adopts the STO
status and for which reason.
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