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MD150E – pulses and velocity counter (02.06.2014)  

 

2.

 

Device description 

2.1

 

Intended use and properties 

MD150E

  is  a  multipurpose,  programmable  counter  designed  for  counting  pulses  from  incremental 

encoder  or  other  sources  of  square  wave  signals.  MD150E  can  define  signal  frequency  and  scale 
counted values into required unites (rpm, rps, mm, m, deg, etc.)  
 
With two relay outputs the user is able to set thresholds as desired. MD150E is also equipped with 
additional input for resetting counter state.  
 

MD150E

 counter is very intuitive. Only one parameter is needed to scale number of counted pulses 

to required unit.  
 
MD150E is equipped in 

USB

 and 

RS485 MODBUS 

interfaces. USB enables direct connection between 

processing  unit  and  PC  (record  to  csv  file).  RS485  interface  with  MODBUS-RTU  protocol  enables 
communication with industrial devices like PLC or HMI.  
 
Housing made of full aluminum profile guarantees excellent mechanical resistance to harsh external 
conditions.  
 

MD150E features: 

 

 

Counting external pulses with frequency up to 

2Mhz

 

Power supply 12…36V DC or 230V AC  (depends on version)  

 

Can cooperate with any incremental enkoder, linear magnetic enkoder, other sources of 

Step/direction signals etc., 

 

Scale of counting pulses to any unites,  

 

Defining frequency of counted pulses,  

 

Possibility of recording counted pulses – reconstructing counter state after turning on the 

device, 

 

Setting status of relay outputs based on set thresholds,  

 

4 operation modes of relay outputs  + additional  

cycle counter - 

 it allows use in dose 

application without additional controller,  

 

Data transmission to PC (

USB

) or master device e.g. HMI panel, PLC (

RS485 MODBUS-RTU

). 

 

2.2

 

Description of connectors and front panel 

Front panel 

 

LED1 

- indicator of PK1 relay activation 

LED2 

- indicator of PK2 relay activation 

ESC 

- abortion, Reset (>3sec.) 

DOWN 

- next menu position/next parameter digit/ 
change of displaying mode 

UP 

- previous menu position / digit value increase  / 
change of displaying mode 

Summary of Contents for MD150E

Page 1: ...R s c 62 045 Pniewy D borzyce 16 tel 061 22 27 422 fax 061 22 27 439 e mail wobit wobit com pl www wobit com pl MD150E Instruction Manual Digital processing counter with display for angle velocity and...

Page 2: ...4 6 1 USB interface 14 6 2 RS485 MODBUS RTU interface 14 6 2 1 Description of MODBUS protocol 15 7 Technical parameters 16 Thank you for selecting our product This instruction will help you at correct...

Page 3: ...nts of unknown levels of interruptions it is recommended to use the following means preventing against possible interruptions of the device operation Ground or zero the metal rails on which instrument...

Page 4: ...aluminum profile guarantees excellent mechanical resistance to harsh external conditions MD150E features Counting external pulses with frequency up to 2Mhz Power supply 12 36V DC or 230V AC depends on...

Page 5: ...n two versions of power supply low voltage 12 36 VDC and high voltage 85 260V AC supplied directly from mains electricity 230V For 230V version on 13 V clamp is available 15V voltage which can be used...

Page 6: ...D150E counter then it can be used for direct indication of motor position velocity 2 5 Input signals way of connection MD150E counts pulses from two opt insulated A and B input channels zeroing signal...

Page 7: ...12V 24V encoder with output Open Collector OC or Push Pull PP type Picture 4 Connection of 12V 24V encoder with output Push Pull and Line Driver type Picture 5 Connection of sensor with NPN output Pi...

Page 8: ...divider into required unit Measurement 9999 99 6 OFFS Offset of initial counter value 999999 7 IN Signal input mode of counter A b U d d C 8 FILT Filtration of input signals on oFF 9 DP Number of deci...

Page 9: ...key Value of single digit parameters is selected with and keys If you want to enter a negative value select the first digit from the left then press and hold key until the symbol is displayed With key...

Page 10: ...coders This mode requires signals from two independent sources D C Direction Clock d C mode is specific to control of stepper motors and servo motors B channel counts pulses A channel switch counting...

Page 11: ...2 nIn pulses minute gate time 1 sec 3 HoUr pulses hour gate time 60 sec CAUTION During external zeroing of the counter or counter operation mode with automatic zeroing when zeroing occur more often th...

Page 12: ...tion in milliseconds 4 PMOD operation mode CAUTION P1 and P2 settings can take negative values but it is useful only in some cases see operation modes PMOD operation mode defines way of turning on off...

Page 13: ...ch zeroing is counted by cycle counter L If cycle counter number of zeroing of pulses counter reach value set by P2 parameter PK2 output will be activated P1 0 P2 0 PK1 output is activated for PTIM ti...

Page 14: ...onnection of MD150E counter with MD150E PC software device configuration recording of measurements and for updating of internal software MD150E process display must be powered in order to facilitate c...

Page 15: ...3 Readout of pulses counter value non calibrated value 2 3 CYCLE_VAL R INT 0x03 Readout of cycles counter value L 4 5 5 6 COUNTER _DISP R REAL 0x03 Readout of pulses counter value indicated by display...

Page 16: ...8 bit CRC Lo 8 bit Counter reset COUNTER_RESET Function 05 Register address 5000 Request MODBUS MASTER MD150E Response MD150E MODBUS MASTER Device address 0x01 Device address 0x01 Function 0x05 Functi...

Page 17: ...lses and velocity counter 02 06 2014 17 Display 6 digits height13 5 mm Housing Height 45 mm Width 92 mm Length 81 mm Weight 200g 300g for 230V version IP class IP40 for front panel IP65 Universal pass...

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