AKD-C Installation | 7 Technical description and data
7.15.9.1 Signal diagram (sequence)
The diagram below shows how to use global STO function for a safe drive stop and fault free
operation of the drives connected to one of the strings.
1. Brake the drives in a controlled manner (speed setpoint = 0 V).
2. When speed = 0 rpm, disable the drives (Enable = 0 V).
3. Activate the STO function (STO_Enable = 0 V)
4. For restart you must reset the safety device.
7.15.9.2 Functional test
You must test the safe torque off function after initial start of the drive, after each inter-
ference into the wiring of the drive, or after exchange of one or several components of the
drive.
First Method:
1. Stop drives in the string with setpoint 0 V. Keep drives enabled.
DANGER: Do not enter hazardous area!
2. Activate the global STO function for example by opening protective screen of the string,
where the drives are connected (voltage at AKD-C X16/6 or X16/8 0V).
3. The AKD-C fault contact opens, the corresponding string STO-Status message (X16/1 or
X16/2) changes the voltage level, the drives lose torque and slow down to zero speed
without control.
Second Method:
1. Stop all drives in the string with setpoint 0 V, disable the string.
2. Activate the global STO function, for example, by opening protective screen (voltage at
AKD-C X16/6 or X16/8 0V)
3. The corresponding string STO-Status message (X16/1 or X16/2) changes the voltage
level, the string cannot be enabled.
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Kollmorgen | kdn.kollmorgen.com | February 2018
