Short instruction 227VM-024-05-MB TOC 1. 2. 3. Cover .............................................................................................................................................. 2 Modbus protocol and registers ........................................................................................................ 6 Remarks .......................................................................................................................................
Short instruction 227VM-024-05-MB 1. Cover The cover shows the appropriate units and if diagnostic functions are set. Also there is the 3-digit display (function see 1.1.3) to show selected functions, values and units. The units are printed on the sticker. On the cover of the actuator there are two selectors the value selector (1) and the function selector (2). (3) (1) (2) (4) Differential pressure Sensor 1.1.1. Value selector (∆10° / Edit) The value selector allows the changing of values.
Short instruction 227VM-024-05-MB 1.1.2. Function selector (2) The function selector allows choosing the function depending on its position. If there is no function selected the display will show three dashes (- - -). Function Flow Vmin Vmax Mode Description Shows the actual flow in m³/h, l/s and Test for diagnosis (activated Test function). This display matches with the feedback signal U. The display starts flashing if the servomotor hits an end stop before matching actual to reference flow.
Short instruction 227VM-024-05-MB Function Adr (only ModBus) Vnom Written by: Michael Köhle Description Allows setting the address of the Modbus actuator, by turning the value selector. It is possible to set the address from 1 up to 247. If the value selector is turned to the end-stop "+" the Display shows "2 in", this allows to select the second level.
Short instruction 227VM-024-05-MB 1.1.3. Display (3) The display (3) uses 7-segment numbers in full 3-digits. Additional signs include a small circle, three square dots and two rectangular slashes. The square dots are used with the externally printed text to visualize certain functions or units. It is meant to denote the unit of the value shown in the display. If the controller tries to match reference and actual flow this is shown as flashing dot of the chosen unit.
Short instruction 227VM-024-05-MB 2. Modbus protocol and registers 2.1.1. Protocol Transmission protocol Protocol: Baud rate: Byte sequence: Byte format: Address range: Max. Data bytes Resistance: Modbus / RTU 1200, 2400, 4800, 9600, 19200, 38400 MSB / LSB 8 data bits, 2 stop bits, none parity 8 data bits, 1 stop bits, none parity 8 data bits, 1 stop bits, even parity 8 data bits, 1 stop bits, odd parity 1 to 247 N*1 120 Ohm (Software) Note: Factory settings are indicated bright.
Short instruction 227VM-024-05-MB 2.1.2. Holding register customer (parameter table) -r functions-code 0×03h -w functions-code 0×06h Address decimal 0 Override control memory def. value RAM Data typ WORD Value range 0…10000 r/w r/w 1 WORD 0…4 r/w Command 2 WORD 0…4 r/w Device ID 3 WORD 0..3 r Relative position 4 WORD 0…10000 r Absolute position 5 WORD 0…65000 r Relative flow Absolute flow sensor value 1 6 WORD 0…10000 r Description Set point [%] 0 ..100.
Short instruction 227VM-024-05-MB 2.1.3. Service Values -r functions-code 0×03h -w functions-code 0×06h Name Serial number 1 serial number 2 serial number 3 software version service information min value relative max value relative sensor type 1 Address decimal 100 r/w r memory def. value Description serial number JJMM EEPROM 101 WORD 100..3123 r serial number DDHH EEPROM 102 WORD 01..59599 r EEPROM 103 WORD 1..
Short instruction 227VM-024-05-MB Name mode signal set point analog output Address decimal 122 Data typ WORD Value range 0..3 r/w r/w Value 0 1 2 3 Vnom 200 WORD 0…30000 r/w Vnom unit/functi on 201 WORD 0…5 r/w Written by: Michael Köhle Description Referencing signal Analog In 1 [V] 0(2)…10 communication via Modbus register 0 communication via Modbus register 0 Analog IN 1 [V] 0(2)…10 Analog IN 1 [V] 6±4 memory def. value EEPROM Analog Out absolute position [V] 0 ..
Short instruction 227VM-024-05-MB 2.1.4. Status register Bit number bit0 bit1 bit2 bit3 bit4 bit5 bit6 bit7 Bit8 Bit9 Bit10 Bit11 Bit12 Bit13 Bit14 Bit15 Written by: Michael Köhle Function / Status not used not used not used Kat2 free for write not used ! 1=block detected not used 1= motor drive not used not used not used not used not used not used Set point = actual value not used Date: 13.11.
Short instruction 227VM-024-05-MB Mode register bit0 bit1 bit2 bit3 bit4 bit5 bit6 bit7 Bit8 Bit9 Bit10 Bit11 Bit12 Bit13 Bit14 Bit15 Written by: Michael Köhle Function / Status 1= option setpoint 2-10V activ 1= override Modbus active 1= override CLOSE activ 1= override OPEN activ 1= override Vbetween activ 1= override Vmaximum activ 1= option reversal activ 1= motor off 1= override vmin activ 1= bana_neg activ 1= bana_pos aktiv 1= bana_full aktiv 1= bana_min (0/2V) aktiv 1= bana_max (10v) aktiv 1= bana
Short instruction 227VM-024-05-MB 2.1.6. Error handling If the server receives the request, but detects a communication error (parity, LRC, CRC, wrong address...), no response is returned. The client program will eventually process a timeout condition for the request.
Short instruction 227VM-024-05-MB 2.1.7. Description interface parameter Modbus Display Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 EEPROMvalue 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Baudrate 1200 1200 1200 2400 2400 2400 4800 4800 4800 9600 9600 9600 19200 19200 19200 38400 38400 38400 Parity none even odd none even odd none even odd none even odd none even odd none even odd Stop bits 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1 3.
