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HBC-series V7 LV+MV
Control signal
– correct limits and emergency conditions
Controller monitors presence of driving signal continuously (input PWM, voltage range, potentiometer connections, data transfer). When find
not correct driving signal range, absence of driving signal, potentiometer defect etc., activates emergency stop regime, with parameters
P38
(Masking time for signal lost) and
P39
(Brake intensity for signal lost), which defines all the emergency stop process.
Detail description follows.
Control by Potentiometer:
Control potentiometer has connect resistors with low values
to both terminals, include “pull-up” resistor connect between brush and sys-
tem voltage +3.3V. These additional components bring potentiometer monitoring
– if not cut some of terminals or connection wires, if
brush is not shorting. In all these emergency c
ases is driving voltage moved to “Restricted area H or L”, i.e. out of correct voltage range
and activates emergency stop routine.
For elimination of components tolerances, between Correct range of driving voltage and Restricted areas tolerance zone (safety zone).
Also in this area is driving signal interpreted as Full throttle forward or backward.
For real “safety zone” function, driving signal is not present in this area (standardly). This realized parameter
P13
(tolerance of end posi-
tion). When driving signal reach to these values, is always evaluated as correct Full throttle forward or backward
– always is guarantee
that driving signal reach these “end positions” of driving signal with components tolerances.
This protection mechanism decrease partially available range of used AD converter (~ about 10 - 15%, i.e. from 4095 values to ~ 3680 up
to 3480 values). In practice is not decrease controllers resolution (or smooth of driving), but significantly increase system safety. Concrete
values are determined by settings of parameters
P6
,
P8
,
P13
, respectively also
P9
and
P11
(auxiliary driving channel).
Control by Voltage:
The situation is very similar to the control by voltage from an external generator (voltage source, DAC of superior system, etc.. ) - con-
nected between the terminal GND and terminal "control signal". An error condition occurring during control voltage drop, during cutting of
wires or during short circuit signal to ground (GND) activates the emergency stop. Also bring a higher voltage than the nomin al (i.e. +3.3
V / +5 V / +10 V) internally causes a shift in the prohibited zone (above 3.15V) and activating the emergency stop occurs as in the previ-
ous case. Similarly, the voltage less than 0.15 V is taken as an error condition. Keep in mind that the source of control voltage must be
low im
pedance (< 1 kΩ).
Note:
If necessary, you can "Prohibited areas H and L" suppress (disable) by the parameter
P90
and the control range increase to full
range of 0.0 to 3.3 V.
GND
+3.3V
Controller HBC
-
series
to AD converter
1 kΩ
47 Ω
51 Ω
Uh
=+3.15 V
Ud
=+0.15 V
0.0 V
+3.3 V
150 mV
150 mV
470 kΩ
1 µF
control voltage
(parameter
P6
)
(parameter
P8
)
full throttle forward
STOP
●►
full throttle back
◄●►
Uint=+3.15 V
Uint=+0.15 V
0.0 V
+3.3 V
(parameter
P6
)
(parameter
P8
)
STOP
◄●►
150 mV
150 mV
full throttle forward
STOP
●►
full throttle back
◄●►
STOP
◄●►
470 Ω
*)
value of resistor “
Rs
“ for predefined range:
0.15 up to 3.15V:
--
(
i.e. without resistor Rs
)
0.16 up to 3.3V:
22 kΩ
0.24 up to 5.0V:
274 kΩ or (270K + 3K9)
0.48 up to 10.0V:
1020 kΩ or (1M0 + 22K)
Resistor
Rh
and
Rd
value for these potentiometers:
POT=1K:
Rh=0 Ω
(
without resist
.)
Rd=51 Ω
POT=5K:
Rh=180 Ω
Rd=249 Ω
POT=10K:
Rh=422 Ω
Rd=510 Ω
0 Ω
Rh
Rd
POT=
GND
+3.3V
Controller HBC
-
series
to AD converter
0 až +3.3V
470 Ω
External resistor
470kΩ
1 µF
control voltage
47 Ω
Uint
Rs
*)
full throttle
forward
full throttle backward
Restricted area
H
Real range of
driving voltage
(
P13
) end position width (tolerance)
End position width
(
P13
)
neutral range /
STOP
(
P7
)
One way driving
●►
Bidirectional driving
◄●►
STOP
full throttle forward
STOP
width (
P7
)
Restricted area
L
Correct range of
driving voltage
(potentiometer)
STOP
STOP
full throttle
forward
full throttle backward
Restricted area
H
Real range of
driving voltage
(
P13
) end position width (tolerance)
End position width
(
P13
)
neutral range /
STOP
(
P7
)
One way driving
●►
Bidirectional driving
◄●►
STOP
full throttle forward
STOP
width (
P7
)
Restricted area
L
Correct range of
driving voltage
0 – 100%
STOP
STOP
