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Digital measuring Amplifier
1.
IntroductIon
The MVD 100 measuring Amplifier is designed to control forces, loads, pressures, etc. in connection
with analog sensors, predominantly with DMA transmitters. After conditioning the actual value
signal, the device is digitally assisted by a processor (MSP 430/TI). A total of 3 switching thresholds,
which include hysteresis, switching performance, and pick-up delay, can be programmed and
generated.
2.
descrIptIon
Low drift precision operational amplifiers are used to amplify the sensor voltage to a level which can
be processed by the processor's own A/D converter. The digitalized actual value is then compared
with several set values. Switching signals are triggered if the actual value coincides with, or exceeds
any of these set values. The relevant set values are entered via a keyboard with LCD display which
can be plugged into the amplifier's PCB. This control unit may remain connected or be removed
from the amplifier after programming since it does not affect the amplifier's function.
M AGTROL
Type MVD100
1
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Summary of Contents for Magtrol MVD100
- Page 1 M AGTROL Digital measuring Amplifier Type MVD100 IntroductIon The MVD 100 measuring Amplifier is designed to control forces, loads, pressures, etc. in connection with analog sensors, predominantly with DMA transmitters. After conditioning the actual value signal, the device is digitally assisted by a processor (MSP 430/TI). A total of 3 switching thresholds, which include hysteresis, switching performance, and pick-up delay, can be programmed and generated.
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Page 2: Input Mode
User’s manual MVD100 Input mode input keys The control unit is equipped with 1 switch and 3 keys which provide the following functions : C1 switch To switch from measuring mode to programming mode K1 key To advance parameter display... - Page 3 MVD 100 User’s manual arameter list Clocking sequence when pressing K3: Limit value 1 / set value (xxx %) Hysteresis for limit value 1 (xxx %) Pick-up delay of limit value 1 (xx.x sec) Switching point, normal (0) or inverse (1) Limit value 2 / set value (xxx %) Hysteresis for limit value 2 (xxx %) Pick-up delay of limit value 1 (xx.x sec)
- Page 4 User’s manual MVD100 easuring moDe Set C1 to the « Measuring Mode» position, then press the K1 key once. When in measuring mode the display consistently shows the percentage load on the load cell. In measuring mode, the actual digital values determined are consistently compared with all 3 set values, and switching signals are triggered via the output relays in case of coincidence.
- Page 5 MVD 100 User’s manual The check number is determined by adding the ASCII characters between STX and the two characters before ETB in byte mode without carry. This results in a 1-byte value xy. Two 1-byte numbers (x0, 0y) are determined on the basis of this value. x0 becomes 0x (push 4 times), and then becomes 3x through the addition of 30h.
- Page 6 User’s manual MVD100 5.1.2. easuring Data collection Host dIrectIon mvd100 ENQ (0x05) (when entering programming mode) 1 sec. delay at max. STX (0x02) “REMOTE” shown in display switching point (10 switching point (10 switching point (10 “;” Hysteresis 1 (10...
- Page 7 MVD 100 User’s manual Inversed 3 (“0” or “1”) “;” ETB (0x17) > 0. ttention he vAlues for the switching points must be type code MVD 10 Connection 1 = Plug-in card with 32-pin DIN strip 3 = Version with 20-pin terminal strip 2 = Version with 20-pin terminal strip 8 = Plug-in card with 32-pin DIN strip incl.
- Page 8 User’s manual MVD100 connectIon to 230/115 vac supply voltage Figure 7.1 Jump wire connections for voltage supply...
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Page 9: Terminal Diagram
Figure 8.1 Terminal diagram English Edition – October 2009 Due to the continual development of our products, we reserve the right to modify specifications without forewarning. www.magtrol.com subsidiaries in: MAgTrol Inc MAgTrol SA Great Britain 70 Gardenville Parkway Route de Montena 77 Germany •...