Harvard Inspira Advanced Safety Ventilator User`s Manual

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Operation: Advanced

Remote Control / Monitoring (Serial Communication)

The Inspira is equipped for serial communication through two RS232 ports. Inspira uses a Harvard Apparatus Command Line protocol as the basis of its serial commands.

These serial commands can be found in Appendix C.

RS232 Cable Selection

To connect PC/At or laptop computers you will need a 9-pin male to 9-pin female shielded cable; Harvard Apparatus part number 5154-353. For PCs with a 25-pin serial port connection, use a 9-pin male to 25-pin female shielded cable; 5154-527.

Note: Do not use a “Null-Modem” type cable.

RS232 Cable Connection

• Use correct cable.

• The recommended cable length is 3 meters maximum.

• Turn power off to Inspira and to the external device before connecting the cable into the connectors.

• Check that the Inspira signal ground (pin 5) is connected to the external device signal ground.

• Use shielded cabling to connect Inspira’s chassis ground to the chassis ground of the external device.

Serial Communication Setup

To configure Inspira for serial communications, press [Set] key followed by the

[RS232] key. The display should read “RS232 Setup, Enter to Continue”. Press [Enter] key to display the RS232 input/output selection menu. The display should now read

“Press 1=Input port, 2=Output port”. Select the port you would like to configure

(Input is used for serial connection to a pc; Output is used for a daisy chain setup).The

display should now show the RS232 port setup menu which reads “Press 1=Baud,

2=Bits, 3=Parity, 4=Addr”.

Step Key Display

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Operation: Advanced

Data Transfer Rate Configuration

To configure the data transfer rate, enter the port configuration menu. Press [1] to enter the Baud rate setup screen. The display should read “Press Select Mode to toggle baud” and display current baud rate. Press the [Select Mode] key to toggle through the baud rates (38400, 19200, 9600, 2400, and 1200). Pressing the [Enter] key will accept the valve and return Inspira to the main screen. Default baud rate is 9600.

Step* Key Display

Start, Word, and Stop Bit Configuration

To change the bit configuration, enter the port configuration menu by pressing [2].

The display should read “Define Serial Bits, STRT,WD, STP”, and display the current bit settings respectively. The start bit is fixed at 1 bit and word bits are fixed at 8. Use the numeric keypad to change the number of stop bits. Press [Enter] to return to the main screen.

Step* Key Display

* Note: See page 33 for steps 1 through 4.

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Operation: Advanced

Parity Configuration

To configure the port parity settings, enter the port configuration menu. Press [3] to enter the parity configuration menu. The display should read “Define Parity: 1= Even,

2= Odd, 3= None”. Choose the desired parity by pressing the corresponding numeric key. After making your selection Inspira will automatically return to the main screen. The default parity is “none”.

Step* Key Display

Address Configuration (Future Feature)

To assign an address to the Inspira for use in a daisy chain, enter the port setup menu.

Press [4] to enter the address configuration menu. The display should read “Enter

Address” and display Inspira’s current address. Use the numeric keys to enter an address between 0 and 999. Press [Enter] to enter the selected address and to return to the main screen.

Step* Key Display

Testing RS232 Communication

Once Inspira and the external device are configured with the same port settings, connect the Inspira to the external device using the proper cable. Send the VER command from the external device to Inspira. If the RS232 connection is working properly the

Inspira will return its version number. If nothing is returned, check the cable connection and the port settings to verify that they are configured correctly.

* Note: See page 33 for steps 1 through 4.

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