Teledyne API Model 465L O3 Monitor Operation Manual

8.6.MODBUS Register Maps

8.6.1.MODBUS Commands Supported

Table 8-6 lists the MODBUS commands that are supported by the M465L. Note that the “Write” commands will only work with registers that are configured as Read/Write, see Section 8.6.4. The “Read” commands can be used with any register.

Table 8-6: Supported MODBUS Commands

MODBUS

Description

Function Code

 

01

Read Coils

02

Read Discrete Inputs

03

Read Holding Registers

04

Read Input Registers

05

Write Single Coil

06

Write Single Register

15

Write Multiple Coils

16

Write Multiple Registers

8.6.2.Notes on MODBUS registers

Concentration values in the MODBUS registers are always expressed in units of PPB (parts- per-billion,) regardless of the concentration units setting of the monitor.

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Teledyne 465L operation manual Modbus Register Maps, Modbus Commands Supported, Description, Function Code