Lenze EVF9383 - Manual (Page 416)

Safety engineering
Operating mode
11
11.2
l
11.2−2 EDSVF9383V EN 7.1−04/2012
The "Safe torque off" status is activated via two different disconnecting
paths which are independent of each other:
1. disconnecting path: Pulse inhibit via safety relay K
SR
(terminal X11/33,
X11/34)
ƒ In the case of LOW level at terminals X11/33, X11/34, the safety relay
K
SR
is deactivated.The driver supply of the power section drivers is
interrupted. The inverter no longer receives pulses.
ƒ The disconnection of the safety relay K
SR
has to be monitored
externally, so that a failure of this disconnecting path can be detected.
X11/K31, X11/K32 is a forcibly guided break contact, i. e. if the safety
relay K
SR
has been deactivated ("Safe torque off" activated), the
contact is closed.
2. disconnecting path: Controller inhibit by input signal at terminal X5/28
ƒ The input signal at X5/28 is fed to the microcontroller system and the
PWM unit. In the case of LOW level at terminal X5/28, the output of
pulses to the inverter is inhibited in the microcontroller system.
ƒ The disconnecting path "Controller inhibit" can be evaluated optionally
via a digital output. Further information can be gathered from the
chapter "Functional test" (
¶ 11.4−1).
"Safe torque off" is activated if both disconnecting paths are on LOW level.
An AND operation of the disconnecting paths prevents the drive from
restarting if only one disconnecting path is enabled.
"Safe torque off" is deactivated if both disconnecting paths are on HIGH
level.
Activating "Safe torque off"
Deactivating "Safe torque
off"