Dolomite Mitos Інструкція з програмування - Сторінка 4
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The Dolomite Centre Ltd.
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If the new COM port cannot find a driver, force it to install the standard FTDI serial port
driver version 2.8.14 or later. This is available from Dolomite Support.
The RS232 protocol settings for the pump are:
57600 baud, 8 data bits, 1 stop bit, no parity, no handshaking.
Each command or response is terminated with a two character <CR><LF> combination (characters
13 and 10).
Commands and responses take the form of ASCII strings, typically a single character, sometimes
plus parameters. All responses start with "#x" where x is the single character command sent.
Details of the command and response syntax are given in section 6 below.
5 Controlling the pump
Normally, the pump is used in pressure control mode but with the correct attached flow sensor
equipment, flow control mode can be used. These sections talks primarily about pressure
control, but are equally applicable to both control modes. More details about using flow control
are given below.
5.1 General
From the programming point of view the pump operates the following state machine. There are
two control modes and five pump states.
Control is achieved by moving the pump between modes/states with appropriate commands.
The ERROR state can be arrived at either spontaneously (a real physical error) or through an
incorrect command. A detailed explanation of the characteristics of each state is given below.
5.1.1 IDLE (State: 0)
This state means the pump is not running any operation. If the pump is in the REMOTE_CONTROL
mode your application can issue any control command. Otherwise, it can only issue query
commands.
To return to IDLE when in CONTROL send a "P0" command. TARE and LEAKTEST states revert to
IDLE automatically on successful completion. The ERROR state can only return to IDLE using the
"C" command.
5.1.2 CONTROL (State: 1)
In this state the pump controls at a target pressure. Getting to this state is possible only from
IDLE by issuing a "control pressure" command, e.g. "P2500" – this starts CONTROL and sets the
target pressure to 2500mbar.
3600051 - P-Pump API - programming instructions - v 1.3
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