ZIEHL-ABEGG ZETADYN 4C, Перевод оригинальной инструкции по эксплуатации, Страница: 61 / 204

9.5 Notes for operation
The two STO inputs must be switched simultaneously by separate relays with every travel (two-
channel activation). Removal of one of the two STO_A or STO_B input signals already leads to
switching off of the output stage.
When switching the STO input signals STO_A / STO_B, a time offset of max. 120 ms is tolerated
between the signals. In the event of a greater offset the ZETADYN 4
fi rst triggers the error "STO: fault"
(error 533). This gives the elevator control system the option of aborting travel.
If the actuation fault persists, safe switch-off is effected after a further min. 190 ms and max. 1,480 ms
(typically 630 ms) by the internal diagnostics (error 960 "STO: diagnostics").
An error detected by the internal diagnostic (unequal activation or internal hardware defect) leads to a
locked error state. The error can only be reset after switching the line voltage off/on.
STO_A
STO_B
< 120 ms
STO_Info
ST
X-STO
X-OUT
Correct activation STO
STO_A safety-related input STO_A
STO_B safety-related input STO_B
STO_Info inputs STO_A / STO_B active
– enable output stage
ST fault
STO_A
STO_B
1
2
STO_Info
ST
X-STO
X-OUT
120 ms 190 ms < T < 1480 ms
Faulty activation STO
1 Error "STO: Fault ”
2 Error "STO: Diagnostic"
The following times must be kept in operation for suf
fi
cient test coverage by the diagnostics.
•
STO activation (switch-off of STO_A and STO_B) at least once an hour for at least 1600 ms.
The correct activation of the STO inputs is monitored additionally (not safety-related) by the ZETADYN
4 for every travel:
•
If the safe torque off is not cancelled (signals STO_A, STO_B remain LOW) at the beginning of
travel after expiry of the time speci
fi ed by the T_SDLY parameter (Monitors menu), the error "STO:
Remains" (error 530) is triggered.
•
If no safe torque off takes place (signals STO_A, STO_B remain HIGH) at the end of travel after
expiry of the time speci
fi
ed by the T_SDLY parameter (Monitors menu), the error "STO: Missing"
(error 532) is triggered.
•
If the safe torque off is cancelled at standstill (no travel signals applied) (signals STO_A, STO_B
become HIGH) and no travel signal is applied after the time speci
fi
ed by the T_SDLY parameter
(Monitors menu), the error "STO: Travel signal missing" (error 534) is triggered.
Translation of the original operating instructions
ZETADYN 4C
"Safe Torque Off (STO)" function
R-TBA12_01-GB 1415 Part.-No. 00163371-GB
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9
"Safe
Torque
O
ff
(STO)"
function