Siemens Sinumerik 840D sl Function Manual page 333

10/15
PLC
Transfer axes to PLC
DB31..61.DBX63.1=1
No
- - Start FB11
- - Start TV_BTactiv
(time until feedback signal
that SBT is active
- - Start timer TV_Bclose
(time until the brake closed
feedback signal)
- - FB11 outputs a travel command
- - Start timer TV_FeedCommand
(time up to the traversing
command output)
- - Start timer TV_FXSreached
(time up to fixed
stop reached)
- - Traverse axis against
closed brake at standstill
(Start FC18)
- - Start timer TV_FXShold
(time period that the
motor applies force against
the brake)
- - Monitoring time
expired
- - Delete traversing command
- - Exit brake text in the
NCK
- - Start TV_BTactiv
- - Open brake
- - Output FB11 Done
Figure 7-36 Sequence, function test of the mechanical brake system
© Siemens AG 2015 All Rights Reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition
START
PLC
axis
Y
e
Start brake test
s
DB31..61.DBX11.0 = 1
)
Brake test active
DB31..61.DBX71.0 = 1
Close brake *
DB31..61.DBX23.5 = 1
Brake closed *
DB31..61.DBX92.5 = 0
MoveAxis
Output traversing command
DB31..61.DBX64.6 = 1 or
DB31..61.DBX64.7 = 1
Fixed stop reached
DB31..61.DBX62.5 = 1
Exit brake test
DB31..61.DBX11.0 = 0
Delete traversing command
DB31..61.DBX64.6 = 0 or
DB31..61.DBX64.7 = 0
Brake test no longer active
DB31..61.DBX71.0 = 0
Delete fixed stop reached
DB31..61.DBX62.5 = 0
Open brake *
DB31..61.DBX23.5 = 0
Connecting Sensors/Actuators
7.6 Safe Brake Test (SBT)
NCK
*: Motor brake connected to
S120. The control and
feedback signal must be
adapted for an
external/additional brake.
- - Determine holding torque
- - Torque limiting
reduction
- - Feedback signal, brake
closed
- - Detect the fixed stop
with
- - Contour deviation
- - Reaching the
torque limit
- - Withdraw reduced
torque limitation
END
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