Can I use modbus to remotely activate different channels on my 5500sc analyser?

Document ID

Document ID TE2389

Version

Version 5.0

Status

Status Published

Published Date

Published Date 21/01/2019
Question
Can I use modbus to remotely activate different channels on my 5500sc analyser?
Summary
5500sc analyser and modbus to remotely activate channels.
Answer
Yes, this is possible.  The register map for the instrument can be downloaded by following this link:  I need modbus registers for my Hach instrumentation, where can I get them ?

Using the Read/Write integer in register 40081 shown below, it is possible to activate/deactivate each sample channel using modbus:


Step 1:  Binary String Calculation


Step 2:  Converting the Binary data string to Decimal


Open the calculator on your PC, then click on VIEW and choose the Programmer option (Alt + 3) as shown and then choose the Bin option as shown:

Type in the Binary number (without leading zeros), then select Dec to determine the Decimal equivalent that will need to be written to register 40081 as shown:


Step 3:  Write the Binary number in register 40081