High-speed
counter (HSC)
A FBs-PLC can have up to 8 sets of 32bits high-speed
counter. Among which, 4 sets are hardware high-speed
counter (HHSC) whose counting frequency can reach
120KHz (MC)or 920KHz (MN) and can operate
with 8 counting modes. The other 4 sets are software
high-speed counter (SHSC) whose total input frequency
can reach 10KHz and can operate with three counting
modes. The high-speed counters can be used in the
applications required high-speed processing and precision
control.
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Sample
application . .
The control of cutting machine with variable length
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High-speed
timer (HST)
The FBs-PLC has a special design 0.1mS time base high-speed
timer that can provide a timer with 0.1mS resolution
and real-time interrupt capability. Compared
with other brands of PLC’s in
this class that have a resolution of just 1mS including
error in scan time, the FBs-PLC is more than 10 times
as precise. The FBs-PLC can easily handle precision
timing or speed detection applications. The FBs-PLC
has one 16-bit 0.1mS high-speed timer and 4 sets of
32-bit 0.1mS high-speed timer.
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Sample
application . .
Combine HSC and HST to detect the break or blunting
of drill. |
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NC
position control
The High-speed pulse output (HSPSO) of the FBs-PLC
can perform up to 4 axes NC servo or stepping position
control. With the accelerating and decelerating function,
it is easy to achieve smooth and precise multi-zone
position control. If coordinated with the built-in
HHSC feedback, the FBs-PLC can perform closed loop
control to compensate the wear, aging and unconformity
of components. The FBs-PLC also provides a position
control language, which when used with the convenient
instruction in the ladder diagram, can facilitate
the implementation of precise position control.
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| Sample
application
. . Use one PLC to perform 3 axes position
control |
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High-speed
interrupt
An FBs-PLC can have up to 16 points of external interrupt
inputs. The interrupt can be
activated by the change of input status which can
be positive edge/negative edge or both edges. When
using the input interrupt function high speed operations
can be detected on the input which would normally
be missed on a normal I/O scan.
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Sample
application . .
Elevator Position Control |
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General
purpose PID control
The FBs-PLC provides a general purpose PID control
function which compares the process variables read
from analog input (AI) with the preset values defined
by the
user the FBs PLC performs
PID calculations according to the proportional band
(P), intergral constant (I) and derivative constant
(D). An output control value is obtained from above
execution and is controlled through the analog output
(AO) to control process within the range specified
by user. This feature can be applied for smooth precise
control such as flow, pressure and level control.
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Sample
application . .
Level control |
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Temperature
measurement and PID control
The FBs-PLC provides a thermocouple temperature modules
for (J,K,R,S,E,T,B,N thermocouples) as well as a RTD
temperature module(for Pt-100 and Pt-1000 RTD). Thermocouples
are suitable for the measurement of large temperature
ranges such as a boiler process. RTD’s are good
for the measurement of low temperature, smaller ranges
of temperature and higher resolution such as refrigeration
and air conditioning application. Due to the characteristics
of temperature control, adopting multiplexing scan
measurement and multiple loop PID control make a single
FBs-PLC capable of performing up to 32 loops of PID
temperature control. With the convenient instruction
of temperature measurement and temperature PID control
in the ladder program development software significantly
reduce the difficulty, cost and time of developing
and testing monitoring and control programs.
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| Sample
application .
. Injection molding machine temperature control |
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