Fluke-biomedical MPS450 User Manual download pdf (Page 85)

Remote Operations

Introduction 4

4-3

Introduction

MPS450 features include a built-in RS-232 serial port running at 9600 baud—configured

so that it can be connected to a standard PC serial port with a straight-through cable—

that enables instrument control through remote commands. (See the “Entering Remote

Commands” section later in this chapter.)

Remote Connection

The serial-port connector is a 9-pin female D-SUB, configured as Data Communications

Equipment (DCE) and intended to connect straight through to Data Terminal Equipment

(DTE). Table 4-1 lists the pins of the remote connector and their signal name and

function:

Table 4-1. Remote Connector Signal Pin-Out

Pin Signal Name Direction DCE Function

(not used)

RX Output Data received by DTE (transmitted by

MPS450/DCE)

3 TX Input Data transmitted by DTE (received by

MPS450/DCE)

4 (not used)

5 Ground Signal common

6 DSR Output Handshake line indicates MPS450/DCE ready,

always ON

7 RTS Input Handshake line from DTE says MPS450/DCE

can send data

8 CTS Output

Hand Handshake line tells DTE it is OK to send

data to MPS450/DCE

9 (not used)

For serial communications to work properly, the RTS handshake line must be connected

and functioning. Normally, when connecting to a PC serial port, that requirement is met.

The PC serial port may need to be configured in order to turn on RTS/CTS handshaking.

Entering Remote Commands

In addition to using the MPS450 keypad (in either the menu-control or numeric-control

mode), the instrument can be controlled by sending remote commands to its serial port.

For example, the following remote-entry command sets blood-pressure sensitivity to

40 μV/V/mmHg:

BPSNS40

A complete list of the remote-entry commands, which set up MPS450 parameters and

return standard operational responses, is arranged by category is in the “Codes and

Actions” section later in this chapter.

The following guidelines apply to entering remote commands:

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