Starting The System After Specific Events - Siemens S7-300 Installation Manual

$SSHQGL[
 $VVHPEO\
 *HQHUDO 5XOHV DQG 5HJXODWLRQV IRU 6 2SHUDWLRQ
,QWURGXFWLRQ
In view of the many and versatile S7-300 applications, this chapter can only
describe the basic rules on its electrical configuration. You must observe at least
these basic rules if you want your S7-300 to operate free of trouble.
(0(5*(1&<2)) GHYLFHV
EMERGENCY-OFF devices to IEC 204 (corresponds to VDE 113) must remain
effective in all operating modes of the plant or system.
6WDUWXS RI WKH V\VWHP DIWHU VSHFLILF HYHQWV
The following table shows you what you have to observe when starting up a plant
again following specific events.
Table 12-1
Restart following a voltage dip or power
failure,
Start-up after releasing the EMERGENCY
OFF device:
S7-300 Automation System, Hardware and Installation: CPU 312IFM - 318-2 DP
A5E00203919-01

Starting the system after specific events

,I WKHUH LV :KDW PXVW QRW KDSSHQ 
No dangerous operating states may occur. If
necessary, force EMERGENCY-OFF.
An uncontrolled or undefined start-up must
be avoided.

12-1