CARLO GAVAZZI EM21 - COMMUNICATION PROTOCOL V1 REV0 User Manual

EM21 COMMUNICATION PROTOCOL Version 1 Revision 2 July 29th, 2010

Energy management EM21-DIN Communication Protocol 10 2.7.5 Pulse output configuration menu MODBUS: read read and write mode

Index 1.1 Introduction ...

Energy management EM21-DIN Communication Protocol 3 1.1 Introduction The RS485 serial interface supports the MODBUS/JBUS (RTU) pr

Energy management EM21-DIN Communication Protocol 4 Response frame (incorrect action) Description Length Value Note Physical address 1

Energy management EM21-DIN Communication Protocol 5 Response frame (incorrect action) Description Length Value Note Physical address 1

Energy management EM21-DIN Communication Protocol 6 1.3 Application notes 1.3.1 RS485 general considerations 1. To avoid errors due t

Energy management EM21-DIN Communication Protocol 7 2 TABLES 2.1 Data format representation In Carlo Gavazzi instruments The variables

Energy management EM21-DIN Communication Protocol 8 2.3 Instantaneous variables and meters MODBUS: read only mode with functions code 03

Energy management EM21-DIN Communication Protocol 9 2.6 Carlo Gavazzi Controls identification code MODBUS: read only mode with functions