Introduction - ABB DATUM L150 Operating Manual

1 INTRODUCTION

This Operating Guide describes the DATUM L150/L160 MODBUS serial data
communications option and must be used in conjunction with the standard User
Guide ( IM/L150 or IM/L160 ) supplied with the instrument.
Information.
The MODBUS option provides the following facilities:
• Standard RS422/485 communications.
• MODBUS RTU protocol – for master (host computer) to slave
(DATUM L150/L160) system.
• 500V d.c. isolation from external connections to the instrument.
• Two-wire or four-wire communication.
• 2400 or 9600 baud transmission rate.
• Parity-checking – odd, even or none.
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