Keba ServoA SA52.0100, Operation Manual

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61
ServoA Operation Manual
Functional Torque Off
ID no.: LDS-O-SA- EN -202103
6.1.2 Wiring and commissioning
For the
torque off
function the servocontrollers are equipped with additional logic circuits
and a feedback contact. The logic cuts the power supply to the pulse amplifiers to
activate the power stage. In combination with the controller enable “ENPO“, the system
uses two channels to prevent the motor creating a torque.
ENPO
ISDSH
CH1
X8
18
21
10
3
1 (24 V+)
M
3~
~
3
3
RSH
CH2
Figure 6.1
Torque off
selection of function via switch with two NC contacts (positively
operated)
ENPO ISDSH
Torque
off
Restart
inhibit
Controller state RSH
1)
L L ON ON
Power stage disabled via two
channels
High
H
3)
H
3)
OFF OFF Power stage ready Low
(L) → H
2)
(L) → H
2)
OFF OFF Power stage ready Low
H (H)
→
L ON ON
Power stage disabled via two
channels
High
(H) → L H OFF OFF
Power stage disabled via one
channel
Low
(L) → H H OFF OFF Power stage ready Low
( ) Previous status
1) 3 x 106 switching cycles at 200 mA (resting: NO contact)
2) n order to deactivate the restart inhibit the control signals must be simultaneously
(ENPO max. 5ms before ISDSH) set to High (H), or ISDSH must be reliably set to
High (H) before ENPO.
3) This only applies when functional torque off has been disabled by the process
described in “2)“
Table 6.2 Switching response of the torque off function
NOTES:
•
There is no protection against unexpected restarting after re-establishing
the electrical power supply in the illustrated example circuit, unless an
external circuit is used (figure 6.1). If ENPO and ISDSH are High when
reconnecting the power supply (see table 6.2), the axle may start up if
autostart is programmed.
• In order to cancel the torque off function and deactivate the restart
inhibit, the ISDSH signal must be set to High before the ENPO signal, or
simultaneously with it.