AKD Installation | 7 Technical description and data
7.16.2 Safety instructions
WARNING
No Brake Power!
Serious injury could result when a suspended load is not properly
blocked. The drive cannot hold a vertical load when STO is active.
Add a safe mechanical blocking (for instance, a motor-holding brake).
Elevator applications are not allowed.
WARNING
Automatic Restart!
Risk of death or serious injury for humans working in the machine. The
drive might restart automatically after power on, voltage dip or interruption
of the supply voltage, depending on the parameter setting. If parameter
DRV.ENDEFAULT is set to 1,
then place a warning sign ("WARNING: Possible Automatic Restart" or
similar) to the machine.
Ensure, that power on is not possible, while humans are in a dan-
gerous zone of the machine.
CAUTION
High electrical voltage!
Risk of electrical shock! The STO function does not provide an electrical
separation from the power output. If access to the motor power terminals is
necessary,
disconnected the drive from mains supply,
consider the discharging time of the DC-Bus link.
In case of single channel control: If the safety function STO is automatically activated by a
control system, then make sure that the output of the control is monitored for possible mal-
function. The monitoring can be used to prevent a faulty output from unintentionally activ-
ating the STO function. If the STO function is a single-channel system, erroneous engaging
will not be recognized.
It is not possible to perform a controlled brake if the drive controlled STO-Enable is off. If con-
trolled braking before the use of the STO function is necessary, the drive must be braked and
the input STO must be separated time-delayed from +24 V .
In case of a specific double fault within a very short time (
# 55) a single movement of a
maximum angle of 120° (electrical) can happen. This effect can only happen if the drive is in
the function STO. Even if the STO function will be issued for a whole year, this event will
only happen every 100 Billion years.
56
Kollmorgen | kdn.kollmorgen.com | October 2017
