gefran 40F 96, Quick Start Manual, Page: 6 / 8

D
pe
= encoder pulley diameter [ m ]
D
pm
= motor pulley diameter [ m ]
ω
e
= encoder angular velocity [ rpm ]
ω
m
= motor angular velocity [ rpm ]
K
e
= number of pulses per encoder rev [ clock / rev ]
ω
e
D
pm
τ
= = = drive ratio
ω
m
D
pe
1
f = frequency in input to instrument [ Hz ]
•
ω
e
•
K
e
60
K
s
is defined as multiplicative constant of instrument:
1 D
pm
Value shown [ rpm ] = K
s
•
f = K
s
• •
ω
m
• •
K
e
60 D
pe
time
Alarm
setpoint
Output
Alarm
F.0 = 1
DON = Delayed activation
F.0 = 2
DBI = Delay in turning on output after output is
turned off
time
time
time
F.0 = 3
DOF = Delayed deactivation
F.0 = 4
DP0 = Delayed activation only at power-on
Variable
rA rA
t < rA
Alarm
setpoint
Output
Alarm
Variable
rA
t < rA
t > rA
Alarm
setpoint
Output
Alarm
Variable
Alarm
setpoint
Output
Alarm
Variable
rA rA rA rA
The diagrams refer to a normal absolute alarm with hysteresis H = 0
• Filter - outputs with reference to parameters F.0 and r.A
Applicative example
Configure the instrument to show motor axle speed in rpm, connected to an encoder as per the diagram.
MOTOR
ω
m
D
pe
D
pm
ω
e
f
K
e
ENCODER
6
81671B_MHW_40F96_0308_ENG