178 Safety functions
SMS function, version 1
The operation of the SMS function, version 1 is described in the time diagram and
table below. For configuration, see section How to configure SMS, version 1 on
page 374.
A SMS trip limit positive (parameter SMS.14)
B SMS trip limit negative (parameter SMS.13)
C Response time (depends on system configuration, see page 532)
SMS trip limits (A and B)
Step Description
1 The motor speed reaches the SMS trip limit positive (A).
2 After time C has elapsed, the FSO activates the SSE function. In this case, the SSE
function has been configured as “Immediate STO” (parameter SSE.13). This opens
the drive STO circuit immediately and the motor coasts to a stop. The STO and SSE
indications go on.
Note: If SBC is used, it is activated according to SBC configuration settings (see the
note on page 49). See section Safe stop emergency (SSE) on page 106 for more
information on how to configure the SSE function.
3 After the SSE function has been completed, the FSO acknowledges the SSE function
(in this case, automatic acknowledgement is used) and deactivates the SSE and drive
STO functions. The indications go off.
1
Drive STO state
& indication
B
A
C
2
SSE state
& indication
3
Motor speed
Time
- -> Safe stop emergency (SSE)
To Next Page
Loading...
