Satec PM290 Reference Guide

1
PM290 Communication Protocols
Communication protocol is a method of transferring information between different devices (i.e.,
the Powermeter and a computer) where the protocol is a repertoire of computer commands and
the Powermeter responses.
For example, the computer will command a specific Powermeter to send to the computer all of its
measured data. The Powermeter will respond by sending all the data in a specific known order so
the computer will recognize it and treat it as data.
This section details the protocols, the computer requests and the Powermeter replies.
The user can choose between two protocols, ASCII and MODBUS.
NOTE
Every effort has been made to ensure that the material herein is complete and accurate. However, the
manufacturer is not responsible for any mistakes in printing or faulty instructions contained in this book.
Notification of any errors or misprints will be received with appreciation.
For further information regarding a particular installation, operation or maintenance of equipment, contact the
manufacturer or your local representative or distributor.
This book is copyrighted. No part of this book may be reproduced, stored in a retrieval system, or
transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise
without the prior written permission of the manufacturer.
Table of Contents
1 ASCII PROTOCOL....................................................................................................................2
1.1 Message Format ................................................................................................................2
1.2 Data Request .....................................................................................................................2
1.3 Examine Set Point High Boundary.....................................................................................5
1.4 Change Setpoint High Boundary .......................................................................................7
1.5 DIP Switches Status Request ............................................................................................8
1.6 Reset Accumulated Values to Zero ...................................................................................8
1.7 Send Printer String.............................................................................................................9
1.8 Examine Set Point Low Boundary .....................................................................................9
1.9 Change Set Point Low Boundary.......................................................................................9
1.10 Reset Powermeter..........................................................................................................9
1.11 Receive Version Number............................................................................................. 10
1.12 Error Replies................................................................................................................ 10
2 MODBUS PROTOCOL .......................................................................................................... 11
2.1 Introduction...................................................................................................................... 11
2.2 Transmission mode......................................................................................................... 11
2.3 Framing ........................................................................................................................... 11
2.3.1 Address Field ........................................................................................................... 11
2.3.2 Function Field .......................................................................................................... 12
2.3.3 Data Field................................................................................................................. 12
2.3.4 Error Check Field ..................................................................................................... 12
2.4 Detailed Command Description ...................................................................................... 13
2.5 Powermeter Internal Data Tables ................................................................................... 18
2.5.1 Data conversion ....................................................................................................... 18
2.5.2 Measured Data Table .............................................................................................. 19
2.5.3 Setpoint Tables ........................................................................................................ 21
2.5.4 System Configuration Setpoint ................................................................................ 24
2.5.5 Powermeter Status Table ........................................................................................ 25
BG0321 Rev. A1

Satec PM290 Specifications

General

Brand	Satec
Model	PM290
Category	Measuring Instruments
Language	English