Safety engineering
Safety functions
Integration into the application of the controller
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EDS94AYAE EN 6.0
Status word SMI_dnState
Bit Name Meaning
0 STO Safe torque off is active.
3 EC_STO Error stop category 0 is active (Safe Torque Off).
4 EC_SS1 Error stop category 1 is active (Safe Stop 1).
5 EC_SS2 Error stop category 2 is active (Safe Stop 2).
8 SLS1 monitored Safely limited speed 1 is activated and maintained.
9 SLS2 monitored Safely limited speed 2 is activated and maintained. (from SM301 V1.1)
10 SLS3 monitored Safely limited speed 3 is activated and maintained. (from SM301 V1.1)
11 SLS4 monitored Safely limited speed 4 is activated and maintained. (from SM301 V1.1)
12 SDIpos monitored Safe positive direction (SDIpos) is activated and maintained. (from SM301 V1.3)
13 SDIneg monitored Safe negative direction (SDIneg) is activated and maintained. (from SM301 V1.3)
14 Error active SM301 safety module in error status (trouble or warning).
Unlisted bits are reserved for future extensions!
Status word SMI_dnIOState
Bit Name Meaning
0 SD−In1 Sensor input 1 in ON state.
1 SD−In2 Sensor input 2 in ON state.
2 SD−In3 Sensor input 3 in ON state.
3 SD−In4 Sensor input 4 in ON state.
5 AIS Restart acknowledgement via terminal in ON state.
6 AIE Error acknowledgement via terminal ON state.
8 PS_AIS Restart acknowledgement via safety bus.
9 PS_AIE Error acknowledgement via safety bus.
12 SD−Out1 Safe output 1 (feedback output) in ON state.
Unlisted bits are reserved for future extensions!
If communication to the standard device is interrupted, e.g. by switching off the standard
device, the safety module responds by means of the following actions:
ƒ Error stop with STO is activated
ƒ "Warning" error message is transmitted
ƒ The "ME" LED is blinking
The required fault acknowledgement (AIE) is possible via terminal or safety bus. For further
information read the "Error management" chapter.
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