When the frequency limitation is active, the relays of the signal circuit are closed
(status FREQUENCY_IN_LIMITS). If the actual frequency is not within the valid
frequency range or an error occurs in the signal circuit, the relay opens. Thus, the
output signal is deactivated (status FREQUENCY_OUT_OF_LIMITS), i.e. the PLC
cannot read its OSSD signal back.
In addition, the drive adds monitoring pulses to the OSSD signal which must be filtered
by the PLC. These monitoring pulses are used to check the hardware components. If
any faulty behavior occurs, the signal circuit is immediately opened.
The signals must be pulsed OSSD signals. Static signals are not safe.
Fig. 7: Status Transmission via OSSD Signal
If several drives should be evaluated, a signal chain can be created (see
). You
can connect up to 16 drives (or 8 double-axis drives) in one signal chain.
W
Safe Limited Output Frequency (SLOF)
Drive System SD2 - Safety Functions SFM / SLOF
21
4
Содержание SD2
Страница 1: ...Drive System SD2 Safety Functions SFM SLOF P TD 0000426 12 2019 08 28 SIEB MEYER W ...
Страница 4: ...Chapter Overview W 4 Drive System SD2 Safety Functions SFM SLOF ...
Страница 10: ...General Information W 10 Drive System SD2 Safety Functions SFM SLOF 2 ...
Страница 16: ...Safe Frequency Monitor SFM W 16 Drive System SD2 Safety Functions SFM SLOF 3 ...
Страница 44: ...Fieldbus Communication W 44 Drive System SD2 Safety Functions SFM SLOF 6 ...
Страница 56: ...OSSD Signals W 56 Drive System SD2 Safety Functions SFM SLOF 8 ...
Страница 66: ...Error Messages W 66 Drive System SD2 Safety Functions SFM SLOF 10 ...