Brake Watchdog - Baumuller b maXX BM3000 Operating Manual

Description of the Software Modules and Parameters
The following recommendation applies for setting the delay for the pulse inhibit, T
(Z134.8–):
1
2
3
1)
2)
3)

4.5.3.2 Brake watchdog

From firmware version 01.11 a hardware watchdog can be activated by the parameter
Z134.1–
controller firmware does not execute a triggering anymore due to internal errors. The re-
sponding time of the watchdog is 1 ms. The watchdog causes an automatic closing of the
brake.
The monitoring function operates inversely if the logic is inverted to the brake control.
Bit 9 of
If the state monitoring is switched off
1)
T > T
A SignalCom
If the state monitoring is switched on
reporting the state of the current through the brake:
T > T – T
A mech
If the state monitoring is switched on
reporting the mechanical state of the brake:
T = 0
A
Processing time for the command in the controller, max. 2 ms
Drop-out time of holding brakes depends on type, approx. 125-400 ms
Duration of current reduction in brake coil (depends on type, approx. 30 ms) + processing time for response
in controller: max. approx. 32 ms. 
The following must apply for a correct error reaction:
Z134.7–
timeout check-back signal > T
bit 11 for the brake. This watchdog responds at an opened brake as soon as the
Z134.2–
specifies if the current firmware provides the watchdog functionality.
(Z134.1–
2)
+ T
mech
(Z134.1–
3)
SignalFB
(Z134.1–
+ T
SignalCom SignalFB
Parameter manual b maXX BM3000
Document no.: 5.12001.07
Bit 1 = 0):
Bit 1 = 1) and the response signal is
Bit 1 = 1) and the response signal is
4
A
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