VersaPro Temperature Controller
Page 50
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The Versapro will respond to several error conditions. The three exception codes that will generate a
response from the instrument are:
01 – Illegal Function
02 - Illegal Data Address
03 – Illegal Data Value
04 – Slave Device Failure
The response from the Versapro with an exception code will have the most significant bit of the requested
function set followed by the exception code and the high and low CRC bytes.
17.2 MSI Message Protocol
The basic Marathon Monitors message protocol format is shown below.
As indicated, the MSI or proprietary mode allows communication using the 10PRO ‘A’ command protocol or
the ‘U’ block protocol.
The following command set applies to the ‘A’ command and is used for the Versapro and other 10PRO type
instruments such as temperature controller slaves. The command set is sent by a master to a 10PRO slave
instrument. These commands can also be used by any device such as a computer communicating with
instruments via an instrument network. The commands that are supported are shown in the following table.
