Watson-Marlow 505Di User Manual

Page 5

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Change direction by pressing the CW/CCW key. Indication of direction of rotation is provided via the LCD display.

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Select the maximum speed : press the

Ù key and the Max key together. Select the minimum speed: press the Ú

key and the Max key together.

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Press Start to start the pump. Press Stop to stop the pump.

Network

This facility gives full pump functionality under RS232 closed loop control via the 9 pin D connector. Up to 16 pumps can
be linked whilst still retaining individual pump control by using lead PR 0024. A network kit is available from Watson-
Marlow which includes Pumpnet 2, a DOS compatible control program and leads.

Step to Network in the Main menu and press Enter. The pump will now be under RS232 control. The keypad Stop key
will act as an emergency stop and disable RS232 settings if pressed.

Connections for RS232 signals (viewed from inside the plug)

RS232 cabling shown for CTR handshake

Use only twin shielded RS232 cables.

RS232 settings

Baud = 9600 ; Stop bits = 2 ; Data bits = 8 ; Parity = None ; Handshake = CTR or None; Auto echo = On

Pin

Function

Pin

Function

RX (Receive data)

RTS (Request to send)

TX (Transmit data)

CTS (Clear to send)

GND (Ground)

The following codes will operate the 505Di under RS232 control. They must be directed to the pump from a computer
serial port (or equivalent). Always terminate each command with a RETURN (ASCII CHR13).

nSPxxx

Load speed setting xxx to pump number n

nSI

Increment speed by 1rpm for pump n

nSD

Decrement speed by 1rpm for pump n

nGO

Start pump number n

nST

Stop pump number n

nRC

Change rotation direction for pump n

nRR

Set clockwise direction for pump n

nRL

Set anti-clockwise direction for pump n

nDOxxxxx,yyy

Set dose for pump number n in tachometer pulses (note 3)

nRS

Show status for pump number n (note 4)