FCB 21 Brake test

INFORMATION

The configuration menu is only visible when the function is activated in the [Basic settings] configuration menu under "Functions used".

"Use advanced settings" is deactivated

Parameter name	Description
Basic settings (settings of the general test parameters)
Use advanced settings	Display and use advanced settings.
Use advanced settings	Index: 8521.20, bit 0
Direction of rotation	Select the direction of the generated torque: Positive and negative direction of rotation Positive direction of rotation Negative direction of rotation The "positive" or "negative" directions refer to rising or falling values of the relevant encoder in DT1.
Direction of rotation	Index: 8521.1
Torque input relative	Torque of the motor in % of the nominal motor torque that is to be generated for testing the brake. The torque is a relative torque with reference to the motor. If an additional load torque is active in the application, its amount and direction must be taken into account in the torque specification.
Torque input relative	Index: 8521.3 (Int 32)
Test duration	Time interval for applying the torque to the closed brake.
Test duration	Index: 8521.6 (Int 32)
Measured motor torque relative	Measured proportion of the torque applied by the motor during the brake test. The value is displayed each time the brake test is performed.
Measured motor torque relative	Index: 8521.9 (Int 32)
Actual values (display of status and test results)
Brake test active	Indicates whether the brake test is active.
Brake test active	Index: 8521.8, bit 0
Brake test aborted	Indicates whether an active brake test has been aborted, e.g. by revoking the enable, controller inhibit or fault status.
Brake test aborted	Index: 8521.8, bit 1
Test result NOK	Indicates that the brake test has not been passed, e.g. due to excessive movement during the test.
Test result NOK	Index: 8521.8, bit 2
Test result OK	Indicates that the brake test has been passed and the brake has been able to hold the torque.
Test result OK	Index: 8521.8, bit 3

"Use advanced settings" is activated

Parameter name	Description
Basic settings (settings of the general test parameters)
Use advanced settings	Display and use advanced settings.
Use advanced settings	Index: 8521.20, bit 0
Direction of rotation	Select the direction of the generated torque: Positive and negative direction of rotation Positive direction of rotation Negative direction of rotation The "positive" or "negative" directions refer to rising or falling values of the relevant encoder in DT1.
Direction of rotation	Index: 8521.1
Determine load torque	Specify whether an application-specific load torque is to be determined automatically by FCB 21 or is to be specified by the user as a constant load torque.
Determine load torque	Index: 8521.23, bit 0
Load torque INFORMATION: Can only be configured if "Determine load torque" is deactivated.	Existing application-specific load torque. The direction of the load torque is defined by the sign when entered (e.g. -20 Nm).
	Index: 8521.24 (Int 32)
Check load torque INFORMATION: Can only be configured if "Determine load torque" is deactivated.	Specify whether the configured "load torque" is to be checked by FCB 21 using its own measurement.
	Index: 8521.30
Permitted load torque tolerance INFORMATION: Can only be configured if "Check load torque" is activated.	Permitted tolerance for the load torque The configured value is taken into account as a ± tolerance for the specified "load torque".
	Index: 8521.31 (Int 32)
Test duration	Time interval for applying the torque to the closed brake
Test duration	Index: 8521.6 (Int 32)
Duration of torque buildup	Time interval for building up the torque against the applied brake
Duration of torque buildup	Index: 8521.25 (Int 32)
Duration of torque reduction	Time interval for reducing the torque against the applied brake
Duration of torque reduction	Index: 8521.26 (Int 32)
Activate test for 2 brakes	Activation of testing a second brake. The second brake is tested automatically after the first brake. INFORMATION: Testing 2 brakes requires additional wiring for separate control of the brakes. For more information, refer to chapter Brake test.
Activate test for 2 brakes	Index: 8521.32, bit 0
Brake 1/brake 2 (settings of specific test parameters for brake 1/2)
Encoder selection	Select the relevant encoder that checks for possible movement during the test: Actual speed source Actual position source
Encoder selection	Index for brake 1: 8521.29 Index for brake 2: 8521.59
Actual speed source	Displays the current encoder assignment for "actual speed source" in DT1
Actual speed source	Index: 8565.2
Actual position source	Displays the current encoder assignment for "actual position source" in DT1
Actual position source	Index: 8565.3
Permitted movement during testing	Permitted movement during the brake test If the value is exceeded, the test result is NOK.
Permitted movement during testing	Index for brake 1: 8521.27 (Int 32) Index for brake 2: 8521.57 (Int 32)
Mechanical backlash	A mechanical backlash can be entered. The value is added internally to the "permitted movement during testing" parameter.
Mechanical backlash	Index for brake 1: 8521.28 (Int 32) Index for brake 2: 8521.58 (Int 32)
Torque input	Torque for testing the brake An application-specific load torque is taken into account internally by FCB 21 (determined load torque or value of the "Load torque" parameter).
Torque input	Index for brake 1: 8521.21 (Int 32) Index for brake 2: 8521.51 (Int 32)
Torque input relative – display value	Displays the converted value of the "torque input" parameter in % of the nominal motor torque Only the torque input without load torque is taken into account here.
Torque input relative – display value	Index for brake 1: 8521.22 (Int 32) Index for brake 1: 8521.52 (Int 32)
Brake release time in DT1	Current brake release time in drive train 1
Brake release time in DT1	Index: 8355.3 (Int 32)
Brake application time in DT1	Current brake application time in drive train 1
Brake application time in DT1	Index: 8355.4 (Int 32)
Actual values (display of status and test results irrespective of the tested brake)
Brake test active	Indicates that the brake test is active.
Brake test active	Index: 8521.8, bit 0
Brake test aborted	Indicates that an active brake test has been aborted, e.g. by revoking the enable, controller inhibit or fault status.
Brake test aborted	Index: 8521.8, bit 1
Load torque determined/specified	Indicates the load torque determined by FCB 21 or specified by the user in the "Load torque" parameter.
Load torque determined/specified	Index: 8521.11 (Int 32)
Actual values – brake 1/brake 2 (status and test results brake 1/2)
Test result NOK	Indicates that the brake test has not been passed, e.g. due to excessive movement during the test.
Test result NOK	Index brake 1: 8521.8, bit 2 Index brake 2: 8521.8, bit 4
Test result OK	Indicates that the brake test has been passed and the brake has been able to hold the torque.
Test result OK	Index brake 1: 8521.8, bit 3 Index brake 2: 8521.8, bit 5
Apply brake signal INFORMATION: Displayed only if "Activate test for 2 brakes" is active.	Indicates that the brake is applied for testing.
	Index brake 1: 8521.8, bit 6 Index brake 2: 8521.8, bit 7
Measured motor torque	Proportion of the total torque generated by the motor during the brake test.
Measured motor torque	Index brake 1: 8521.10 (Int 32) Index brake 2: 8521.40 (Int 32)
Total torque	Torque with which the brake was tested.
Total torque	Index brake 1: 8521.12 (Int 32) Index brake 2: 8521.42 (Int 32)
Measured movement	Movement determined during the brake test.
Measured movement	Index brake 1: 8521.13 (Int 32) Index brake 2: 8521.43 (Int 32)