108
Additional Information
Analog Signal Failure
The Analog Signal Failure event will occur when no speed command is given within a certain time
period at the beginning of a run with external prole pattern generation US04 Control Type = Analog
(2,3) modes, and Serial (4,5) modes
The timer is dened as:
t = 2.5 x (LT01 + LT03)
= 2.5 x (Brake Release Delay + Speed Start Delay)
Default = 2.5 x (0.05s + 0.70s) = 1.875s
Maximum: 20.0 seconds
While the inspection bit is active (eld-bus control word or digital input) the zero-speed timer is ig-
nored. If the inspection bit is released after 20 seconds, the Analog Signal Failure or Serial Command
Speed fault will occur as a typical zero-speed timeout fault. If a speed command is detected during
the LT03 Speed Start Delay, the timer will automatically expire at the phase of the prole where pre-
torque speed control gains (LC05, 10) are active and the drive will switch to the acceleration phase
(LC03, 08, 11).
Brake Switch Failure
When a digital (LI04-11) or serial (Fb21-27) input is programmed for Brake Release Conrmation (18),
the drive checks if the brake opens or closes within a set amount of time. The timers are dened as:
Starting:
t = LT01 + LT03 + 2.5
= Brake Release Delay + Speed Start Delay + 2.5s
Default = 0.05s + 0.70s + 2.5s = 3.25s
Stopping:
t = LT10 + LT12
= Brake Drop Delay + Current Hold Time
Default = 0.10s + 0.50s = 0.60s
Two inputs can be programmed for the brake switch. During stop, the switches should be closed and
open during run. If the brake switch is open during the Idle Mode, then the Brake Switch Failure event
will also occur. If during the run, the brake switch closes, the Brake Switch Failure event will not occur.
5.2.1. Additional Information
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