Siemens SINUMERIK 840D Description Of Functions page 456

8 Application examples
8.3 Testing the function of the brake mechanical system
The signal "PLC controlled axis" (DB "Axis".DBX28.7) must still be set to state 1
by the user program for the entire duration of the test. Prior to activating the
signal "PLC controlled axis", the axis must be set as "neutral axis", e.g. set
byte 8 in the axis DB to channel 0. Set the activating signal in the same byte.
The block may not be started until the NC checkback signal has been received
via the appropriate bit (DB Axis.DBX 63.1).
For PLC-controlled axis, also refer to:
References:
higher)"
8.3.6 Examples
An example of incorrect parameterization that results in Alarm 20095, "Axis %1
impermissible holding torque, measured torque %2" is shown in the following
diagram: The torque due to weight in the drive machine data 1192 has been
parameterized considerably lower than the measured torque m
calculated torque limit m
drive would not be able to produce the required holding torque for this axis
(MD1192+m
m
Measured torque on
selection of brake test
m
Act
611D-MD 1192
0
Fig. 8-6 Example of incorrect parameterization
Commissioning To support start-up of the brake test, Alarm 20096, "Axis %1 Brake test
aborted, Additional info %2" can be enabled via bit 5 in machine data
$MN_ENABLE_ALARM_MASK. This alarm supplies detailed information if the
brake test is interrupted.
8-456
SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
/FB2/ P2 "Autonomous single-axis processes (SW 6.3 and
symmetrically around this MD would mean that the
FXS
is lower than m ).
FXS Act
m
Drive
m
m
Drive
m
. The
Act
MD BRAKETEST_TORQUE
FXS
FXS
t
Torque limiting in current
controller:
MD 1192 + / - m
FXS
© Siemens AG 2003 All Rights Reserved
11.03