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CHAPTER 1 – General description
SMT-BD1/t
Chapter 1 - General description
1 - INTRODUCTION
Series SMT-BD1/t servo modules are PWM servo amplifiers that provide current and speed control for AC
sinusoidal motors (brushless) with transmitter resolver.
The SMT-BD1/t servo drive is 220 VAC or 400 VAC mains operated. The SMT-BD1 plug-in system with 220 VAC
power supply is available as a single-axis block version or as a multiaxis version that can receive up to six axes in
a standard 19" rack including the power supply. The SMT-BD1/t plug-in system with 400 VAC power supply is
available as a multiaxis version that can receive up to three axes in a standard 19" rack including the power
supply.
2 - GENERAL DESCRIPTION
Series SMT-BD1 amplifiers have their own DC/DC converter to provide the appropriate supply voltage (+5 V,
+/-15V). The source supply voltage for the control board is the auxiliary 310 VDC supply voltage. The auxiliary
supply voltage allows to have the amplifier control board still active when the power supply voltage is turned off.
Each module is packaged as a 6 U "double Eurocard":
- one power board with IGBT transistors
- one control board with DSP (Digital Signal Processing).
The SMT-BD1/t servo amplifiers are suited for unwind/rewind and tension control applications. Up to 64 control
sequences including tension control, speed control and torque control can be programmed and combined in order
to solve various unwind/rewind and tension control applications. The sequence chaining capability allows to
define macro-sequences for complex applications: several control sequences can be linked together in order to
be automatically executed one after the other. The control sequences are pre-programmed. So, the application
programming simply consists in initializing the sequences parameters with the desired values.
The SMT-BD1/t servo amplifier most typical unwind/rewind and tension control applications are listed below :
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Material unwind/rewind force control based on diameter sensor feedback
•
Material unwind/rewind line speed control based on diameter sensor feedback
•
Material unwind/rewind force control based on line encoder feedback
•
Material unwind/rewind line speed control based on line encoder feedback
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Accumulator control for material unwinder based on diameter and accumulator sensors feedback
•
Material unwind/rewind tension control based on line encoder and dancer feedback
•
Material unwind/rewind tension control based on diameter sensor and dancer feedback
The SMT-BD1/t servo amplifier operates with a PROFIBUS DP interface. The servo amplifier control and the
parameter setting can both be made via the PROFIBUS DP connection. The servo amplifier control via
PROFIBUS DP connection simply consists in selecting one of the amplifier pre-programmed control sequences
and start its execution.
The SMT-BD1/t servo amplifier can also operate with the RS-232 serial link for the parameters setting and the
sequences programming. The INFRANOR BPCW parameter setting software which is IBM-PC compatible makes
the amplifier commissioning and the application programming easier.
The SMT-BD1/t servo amplifier can also run in stand-alone mode without the PROFIBUS DP connection. In this
configuration, a pre-programmed control sequence is selected via the SEL1 and SEL2 logic inputs and its
execution is started by using the START logic input. However, in this case only the sequence numbers 0 to 3 can
be selected by the SEL1 and SEL2 logic inputs activation.
