Protection Function; Outline Of Protection Function - Mitsubishi Electric MDS-E Series Instruction Manual

MDS-E/EH Series Instruction Manual
12 Appx. 3: Protection Function

12.1 Protection Function

The drive unit offers the protection function.
Configure the system with the safety function compliant control units when using the safety function which satisfies the
international standards.
Refer to NC specifications manual "Smart safety observation (BNP-C3072-022)" for details.

12.1.1 Outline of Protection Function

Function
Emergency stop
observation
SLS
(Safely Limited Speed)
Protection function assumes the following configuration.
A)The machine is equipped with at least one safety door.
B)Safety is ensured when the safety door is closed.
When an operator requests to open the safety door, enable the safety function and release the lock on the safety door.
Safety is ensured by enabling the safety function while the safety door is open. When canceling the safety door open
request, the safety door enters the locked state and safety function will be released.
WARNING
The sequence of enabling or disabling the safety function by opening or closing the door is required to take necessary
actions at the machine tool builders.
IB-1501229-F
NC control unit (CNC CPU unit) and the drive unit separately observe the input of emergency stop.
At the emergency stop, the motor power is shut off by controlling the contactor with each of the PLC
CPU unit (only for C70), NC control unit (CNC CPU unit) and the drive unit (power supply unit).
NC control unit (CNC CPU unit) and the drive unit (servo/spindle drive unit) separately observe the
followings. The motor power is shut off when an error is detected during the observation.
-The command speed does not exceed the speed set with the parameter.
-The rotation speed of the motor does not exceed the rotation speed set with the parameter.
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Details