Operator Control And Display Elements; Emergency Stop Chain - Siemens MPP 464 IE H Equipment Manual

Operator control and display elements

4.1

Emergency stop chain

Emergency stop chain
Press the emergency stop button in emergencies when
• people are at risk
• there is the danger of machines or the workpiece being damaged
As a rule, when operating the emergency stop button, all drives are brought to a standstill with
max. braking torque.
To unlatch the emergency stop button, turn it to the left.
When the emergency stop button is activated, the emergency stop chain of the MPP 464 IE H will
ensure personal safety and protect the machine in hazardous situations.
The emergency stop chain is also active if the handheld units are removed.
To prevent the emergency stop chain from being interrupted while you plug in or pull out the
handheld unit, press the emergency stop override S11. This overrides the emergency stop
button on the handheld unit.
Danger of death caused by malfunction of the emergency stop override
To effectively deal with a malfunction of the emergency stop override S11 (e.g. jamming), the
user PLC program must generate emergency stop when a monitoring time (approximately 5
min) expires (see figure in chapter: "Connecting" → "Handheld unit connection HT 8 with
emergency stop override").
The emergency stop chain of the MPP 464 IE H must be integrated into the system emergency
stop by the user.
Note
Machine manufacturers
For details of other or additional reactions to an emergency stop:
Please read the information supplied by the machine tool manufacturer!
Machine Pushbutton Panel: MPP 464 IE H
Equipment Manual, 03/2021, A5E50810237B AA
WARNING
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