Name
UPID
Type
Value
/ Bit
Significance Comments
Safety Fn State Error
1A1Dh
Bool
-
Error active
This flag is set if an error on the safety module is active.
Cleared if no error is active.
This bit can also be accessed via UPID 1A06h bit 13.
Safety Fn State Int
Event
1A1Eh
Bool
-
Acknowledge is
required
Set if an explicit acknowledge is required as an interface event.
Cleared if no acknowledge is required.
This bit can also be accessed via UPID 1A06h bit 14
Safety Error State
1A02h
Enum8
This variable shows the error state of the safety functions.
The variable is described in detail in
7.7.2.3- Safety Error State
Safety Error Code
1A03h
Enum8
In case of an error, the error code is shown here.
The error codes are described in detail in
7.7.2.4- Safety Error Codes
SLS Active
S_ZSW1
Bool
Bit 4
SLS Active
In case of PROFIsafe S_ZSW1 bit 4 signalizes if SLS is active.
SLS BIT 0
SLS BIT 1
S_ZSW1
2xBool
Bit 9
Bit 10
SLS Limit
Selection
With these two bits the selected SLS level shown. SLS BIT 0 is the low,
SLS BIT 1 is the high bit of the selection.
The following mapping is done:
0: SLS 0 is selected
1: SLS 1 is selected
2: SLS 2 is selected
3: SLS 3 is selected
The feedback if SLS active is shown with bit 4 in S_ZSW1.
Table 87: SS1 Status Signals
The safe digital output can be configured to show the SLS active signal. When one of the SLS 0 to 3 becomes active,
the output is driven. The configuration is done with the parameter Safe Output UPID 47A8h, set to 05h: SLS.
7.21.3 Detailed Functional Description
7.21.3.1 Activation and Timing
SLS is activated if one of following request sources is active:
SLS request on safe fieldbus
SLS request on safe digital input
There are 4 speed levels which can be selected. For each speed level a separate fault reaction can be defined. In case
of multiple requests for different speed levels, the one with the lowest speed is executed.
The SLS reaction time to a request over a safe digital input, safe fieldbus or as internal request is less than 10ms.
When a SLS request is detected and the maximal speed limit is reduced, the SLS Ramp Down Time (UPID 47F8h) (t4 in
figure above) will be awaited, until SLS becomes active. If the maximal speed is switched from a lower to a higher level,
the new speed limit becomes active immediately, so no ramp down time is awaited.
When SLS is active, the speed monitoring is done. If the actual speed is detected as higher than the configured speed
limit, the error reaction will be executed.
2S Drive Systems / 0185-1174_E_1V1_SM_C1251-2S / NTI AG
0185-1174_E_1V1_SM_C1251-2S / 2021-11-26 16:43 (Rev. 12500)
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