ABB ACS850 - Page 74

74 Program features
Operation time scheme
The simplified time scheme below illustrates the operation of the brake control
function.
T
s
Start torque at brake release (parameter 42.08 Brake open torq)
T
mem
Stored torque value at brake close (signal 03.15 Brake torq mem)
t
md
Motor magnetising delay
t
od
Brake open delay (parameter 42.03 Open delay)
n
cs
Brake close speed (parameter 42.05 Close speed)
t
ccd
Brake close command delay (parameter 42.06 Close cmd delay)
t
cd
Brake close delay (parameter 42.04 Close delay)
t
ex
Extended run time
Start cmd
Modulating
Ref_Running
Brake open
cmd
Ramp output
Tor q ue ref
Ramp input
Time
t
cd
T
mem
n
cs
T
s
t
od
t
md
123 4
56
7
8
t
ex