188 Safety functions
SDI with time monitoring
This applies when the motor rotates into the forbidden direction when the SDI
function is activated and the time monitoring method is used. The SDI positive
function is used as an example.
A SDI delay (parameter SDI.12): Delay for forcing to start the SDI monitoring.
B Zero speed with encoder (parameter FSOGEN.52): Speed limit to define the motor as
stopped. The safety function is completed and the SSE completed indication (parameter
SSE.22) goes on. The STO acknowledgment becomes allowed.
SDI state &
indication
SDI request
Motor speed
Time
B
1 2
4
A
2b
SDI.12
SSE state &
indication (2b)
3b 3
- -> Safe stop emergency (SSE)
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