Televac® AN 3008: MX200 to PC Interfacing and Communications

1 Description

This application note explains the process for interfacing and communicating with an MX200 Vacuum Controller from a Windows PC.

The recommended method is to use The Fredericks Company Online Serial Terminal. The Online Serial Terminal communicates directly with the MX200 through a supported web browser and allows MX200 serial commands to be sent without installing additional communications software.

USB communication is recommended when connecting the MX200 directly to a Windows PC.

Alternatively, you can use the Tera Term serial communications program. Tera Term must be installed on your computer before following these instructions. If you do not have Tera Term installed, download the latest version from GitHub .

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2 Required Equipment, Tools, and Software

Equipment/Tool Part Number/Requirement
Controllore di vuoto MX200 2-7900-034, 2-7900-037, or 2-7900-038
USB Cable USB Type A to USB Type B cable
Windows PC PC with an available USB port
Google Chrome or Microsoft Edge Online Serial Terminal method
Tera Term Manual method only
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3 Finding the COM Port

3.1

On the MX200, press the Home button and navigate to:

Global Setup → Communications → Interface

Verify that USB is selected.

Then, navigate to:

Global Setup → Communications → Settings

Remember the baud rate. You will select it when connecting to the MX200 using either the Online Serial Terminal or Tera Term.

3.2

Connect the MX200 to your Windows PC using a USB Type A to USB Type B cable.

Connect the USB Type B connector to the USB port on the back of the MX200 and the USB Type A connector to an available USB port on your Windows PC.

3.3

Windows will automatically recognize the MX200 and assign it to a COM Port.

3.4

Open the Start Menu on your Windows PC.

Windows Start Menu icon
3.5

Open the Device Manager.

Windows Device Manager search result
3.6

Expand the Ports (COM & LPT) dropdown.

USB Serial Port COM3 shown in Windows Device Manager
3.7

Determine the COM port assigned to the MX200. In this example, the MX200 is assigned to COM3.

3.8

If you're unsure which COM port belongs to the MX200:

  1. Leave Device Manager open.
  2. Disconnect the USB cable from the PC.
  3. Watch which COM port disappears from the Ports (COM & LPT) list.
  4. Reconnect the USB cable.
  5. The COM port that reappears is the port assigned to the MX200.

Remember this COM port number. You will select it when connecting to the MX200 using either the Online Serial Terminal or Tera Term.

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4 Using The Fredericks Company Online Serial Terminal

4.1

Using Google Chrome or Microsoft Edge, visit The Fredericks Company Online Serial Terminal.

4.2

Select MX200 from the Product dropdown and USB from the Connection dropdown. Select the baud rate configured on your MX200. In this example, 57600 baud is used.

Click CONNECT to open the serial-port selection window.

Online Serial Terminal configured for MX200 USB communication at 57600 baud
4.3

Select the COM port assigned to your MX200, then click Connect.

If you are unsure which COM port to select, see Section 3, Finding the COM Port.

Browser serial-port selection window showing USB Serial Port COM3
4.4

Use the terminal input field or the Command Assistant to send a test command to the MX200. For example, to read the vacuum measurement from channel one:

Send: S101

4.5

Continue using the Command Assistant to locate and send additional supported MX200 commands or enter commands manually in the terminal.

See Section 6, MX200 Communications Commands, for the available commands.

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5 Using Tera Term

5.1

Open Tera Term on your Windows PC.

5.2

Select Serial, then select the COM port assigned to your MX200 from the Port dropdown.

Click OK to continue.

If you are unsure which COM port to select, see Section 3, Finding the COM Port.

Tera Term New connection window with COM3 selected under Serial
5.3

Open the Setup menu, then select Serial port.

Verify that the serial port settings are configured as follows:

  • Baud rate: Baud rate configured on the MX200
  • Data: 8 bit
  • Parity: none
  • Stop: 1 bit
  • Flow control: Xon/Xoff
  • Transmit delay: 0 msec/char, 0 msec/line

Click OK to continue.

Tera Term serial port settings for MX200 communication
5.4

Open the Setup menu again, then select Terminal.

For standard communications, configure:

  • Receive: CR+LF
  • Transmit: CR+LF
  • Local echo: Checked
Tera Term terminal settings for standard MX200 communications

For bootloading, use:

  • Receive: CR
  • Transmit: CR
  • Local echo: Checked
Tera Term terminal settings for MX200 bootloading

Click OK to continue.

5.5

To verify communications:

Send: S101

Press Enter.

The MX200 should return the vacuum measurement for channel 1.

5.6

Continue using Tera Term to send additional supported MX200 commands.

See Section 6, MX200 Communications Commands, for the available commands.

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6 MX200 Communications Commands

Use the following table as a reference for communicating with the MX200.

When using The Fredericks Company Online Serial Terminal, supported commands can also be located and sent using the Command Assistant.

When using Tera Term, enter the desired command manually and press Enter.

For a detailed description of MX200 digital communications and individual commands, refer to Section 9, Digital Communications, of the MX200 Vacuum Controller Instruction Manual .

Comando Uscita del campione Descrizione
R1<cr> XX<cr><lf> Impostazione unità di uscita XX: PA=Pascal, TR=Torr, MB=mBar, TD=Torr decimale, MT=mTorr/Torr
W1XX<cr> XX<cr><lf> Impostare le unità di misura su XX: PA=Pascal, TR=Torr, MB=mBar, TD=Torr decimale
S1XX<cr> ppsee<cr><lf> La lettura a vuoto per la stazione XX è ppsee
S1<cr> XX=ppsee … XX=ppsee<cr><lf> Uscita ppvedere le letture per ogni canale XX
S2<cr> NNNNNN<cr><lf> Versione del firmware logico
S3<cr> NNNNNN<cr><lf> Visualizzare la versione del firmware
S4<cr> XX=YY … XX=YY<cr><lf> Tipi di stazioni di uscita: XX = numero di stazione, YY = tipo di sensore
S5<cr> XX=YY … XX=YY<cr><lf> Uscita set point XX stato YY (ON=on, OF=off, 00=nessun set point collegato)
S6<cr> Televac … <cr><lf> Visualizza tutte le informazioni di configurazione
RC1XX<cr> Baa<cr><lf> Uscita primo punto di taratura per il canale XX
RC2XX<cr> Baa<cr><lf> Secondo punto di taratura dell'uscita per il canale XX
RC3XX<cr> Baa<cr><lf> Uscita terzo punto di calibrazione per il canale XX, errore di ritorno se il punto non esiste
RC4XX<cr> Baa<cr><lf> Output fourth calibration point for channel XX, return error if point doesn’t exist
WC1XXBaa<cr> PPSEE<cr><lf> Impostare il primo punto di taratura per il canale XX
WC2XXBaa<cr> PPSEE<cr><lf> Set second calibration point for channel XX
WC3XXBaa<cr> PPSEE<cr><lf> Impostare il terzo punto di taratura per il canale XX, errore di ritorno se il punto non esiste
WC4XXBaa<cr> PPSEE<cr><lf> Set fourth calibration point for channel XX, return error if point doesn’t exist
R2<cr> 01 02 03 04 05 … <cr><lf> Numeri dei canali di uscita collegati all'MX200
R3XX<cr> HI<cr> or LO<cr><lf> Uscite con risoluzione HI/LO per la stazione XX
W3XX<cr> HI<cr> or LO<cr><lf> Attivare la risoluzione HI/LO per la stazione XX
R4<cr> 01 02 03 04 05 … <cr><lf> Numeri dei canali di uscita impostati per la visualizzazione sullo schermo di misura
W4XX<cr> ON<cr> or OF<cr><lf> Aggiunge o rimuove il canale XX dalla schermata di misura
R5XX<cr> FbaaBAA<cr><lf> Formato di uscita analogica in uscita, valori alti e bassi
W5XXF<cr> F<cr><lf> Impostare il formato di uscita analogica del canale XX su lineare per decennio (lin/dec=3, lin/dec 7E=4)
W5XX1baa<cr> Fbaa<cr><lf> Impostare il formato di uscita analogica del canale XX su lineare: baa=alto valore
W5XX2baaBAA<cr> FbaaBAA<cr><lf> Impostare il formato di uscita analogica del canale XX su lineare: baa=valore alto, BAA=valore basso
R6XX<cr> GG<cr><lf> Impostazione gas in uscita per il canale XX
W6XXGG<cr> GG<cr><lf> Impostare il canale XX sul tipo di gas su GG
R7Y<cr> ppseePPSEEZZ<cr><lf> Relè di uscita Y on = ppsee, relè Y off = PPSEE, e canale ZZ assegnato al relè Y
W7YppseePPSEEZZ<cr> ppseePPSEE<cr><lf> Impostare il relè Y su ppsee, il relè Y su PPSEE e il relè Y sul canale ZZ
R8<cr> A<cr><lf> Outputs the cold cathode mode, A (auto = 1, self = 2)
W8A<cr> A<cr><lf> Imposta il modo catodo freddo, A (auto = 1, auto = 2)
R9<cr> BB<cr><lf> Restituisce il valore del punto di commutazione del catodo freddo, BB (da 01 a 50)
W9BB<cr> BB<cr><lf> Imposta il valore del punto di commutazione del catodo freddo, BB (da 01 a 50)
R10<cr> CD<cr><lf> Returns the cold cathode status odd and even (on/off) C-odd, D-even (0 = off, 1 = on)
W10CD<cr> CD<cr><lf> Sets the cold cathode status odd and even (on/off) C-odd, D-even (0 = off, 1 = on)
C1TTTT<cr> TTTT<cr><lf> Impostare il baud rate su TTTT
C2EE<cr> EE<cr><lf> Impostare l'indirizzo su EE (da 00 a 99), solo RS-485
C4N<cr> N<cr><lf> Cambiare I/O in N (RS-232=1, RS-485=2, USB=3)
C1<cr> TTTT<cr><lf> Impostazione del baud rate di uscita
C2<cr> EE<cr><lf> Indirizzo di uscita per RS-485
C4<cr> N<cr><lf> Tipo di comunicazione in uscita (RS-232=1, RS-485=2, USB=3)
HM<cr> M<cr><lf> Ritorno alla schermata di misura
RLR<cr> SXXX<cr> Uscita il calcolo del tasso di perdita o canale 1 in mTorr (S=segno, XXX=-999 a 999)
WLRX<cr> X<cr><lf> Attivare o disattivare il calcolo del tasso di perdita per il canale 1 (0=off, 1=on)
WD_1XX<cr> XX<cr><lf> Ripristinare le impostazioni predefinite del canale XX
WD_7X<cr> X<cr><lf> Ripristinare le impostazioni predefinite del relè del set point per il set point X
WD_CXX<cr> XX<cr><lf> Ripristinare i valori predefiniti di taratura per il canale XX
WD_G<cr> D<cr><lf> Ripristinare i valori predefiniti per la configurazione globale
SN<cr> NNNNNN<cr><lf> Restituisce il numero di serie a sei cifre dell'unità, con valori da 000000 a 999999
PG_LGC<cr> Bootloader … <cr><lf> Inserisce il bootloader per il firmware logico
PG_DSP<cr> Bootloader … <cr><lf> Enter the bootloader for the display firmware
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