Keri Systems BioPointe Users Manual - Manual (Page 55)

Communicating with the BioPointe
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Chapter 7
7 Communicating with The BioPointe
The BioPointe supports 4 types of serial communication i.e. RS232, RS485, RS422 and Modem.
When you have decided which type of serial communication interface to use, make sure that each cable is
inserted correctly at the location that corresponds with the signal type. In addition, you also need to
configure the BioPointe to the correct type of serial interface and the correct type of baud rate through DIP
switches. Another point to take note is that if you are using RS485 or RS422 for several devices connected
in a multi-drop manner, each device has to be assigned a unique device ID.
This chapter describes how you can communicate with the BioPointe with RS232, RS485, RS422 and the
modem.
7.1 Setting up the Communication
In brief form, a communication link can be setup based on the sequential layout steps listed below. The
details are described in the sections to follow:
Step 1: Power off device
Ensure that the power is switched off so that any wrong connection would not damage the
device
. Also ensure that the positive and ground line is connected correctly.
Step 2: Connect cables :
Insert the wires correctly at the location that corresponds to the signal type.
Step 3: Configure type of serial interface with SW3
This is a hardware setting.
The type of serial interface chosen with SW3 allows the BioPointe to communicate with the
correct signal type
.
Step 4: Configure type of communication and baud rate with SW2
Both are software settings.
The type of communication chosen with SW2 tells the BioPointe how to respond to the
command received. For example, if the selected type is 'RS422 or RS485', the BioPointe would
not respond to commands not addressed to it, but was received in a multi-drop network.
The baud rate chosen also with SW2 should correspond with the baud rate that the host
software uses to communicate with the devices
.
Step 5: Set the Device ID with SW1