Heidolph ROTAVAC Vario pumping unit - Manual (Page 39)

page 39 of 61
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 999248 / 28/04/2011
The controller is equipped with a serial interface (RS 232C, nine-pole Sub-D-plug).
☞
Plug-in or remove the cable (cable RS 232C) from the interface only if the equipment is switched off.
☞ The interface is not electrically isolated from the measuring circuit.
☞ For optimal electromagnetic compatibility assemble an interface filter (cat. no.: 638235).
The controller is fully operable via the serial interface. Measuring results, preselections and the status of
the controller can be read at any time.
7.1 Setting of the interface
Set the interface parameters directly at the controller. The factory set values are underlined.
Edit and confirm the interface parameters in the function ”Configuration” in the menu ”RS-232” using the
selection knob.
➨ Baud: 2400, 4800, 9600 or 19200
➨ Parity: 8-N-1, 7-O-1 or 7-E-1
➨ Handshake: Off, Xon-Xoff or RTS-CTS
➨ Remote: On or Off
➨ Timeout: Sending 1s, receiving 10s.
In remote mode (Remote On, ”PC symbol” in the display) all keys at the controller are inoperable.
To return to the manual operation of the controller set the controller to ”Remote off” in menu
configuration. Therefore switch off the controller. Switch on the controller and press selection
knob within 2s.
➨
A maximum of ten commands per second is possible.
➨ Read commands and commands ”REMOTE”, ”CVC” and ”STORE” can be sent always. The sending
of other write commands is only possible, if ”Remote on” is selected.
➨ The commands have to be written in capital letters.
➨ Command and parameter have to be separated by a blank.
➨ The string is terminated with or .
➨ The answer of the controller is always terminated with .
➨ Numerical values and parameters can be written without leading zeros.
➨ The answer of the controller is always with leading zeros.
7 Interface parameters