P3 - Pakscan Master Station Technical Manual
64 of 136 Publication PUB059-002-00 Issue 06/15
7.5.6 Master Station Host Analyser [host analyser]
Fig 44: Host Analyser pop-up
The Host Analyser is a real time system analyser that can be used with either a Modbus RTU serial
data control source, acting through one of the serial data ports (Port 1 or 2), or a Modbus TCP
Ethernet control source, acting through the Ethernet ports.
The analyser will record up to 100 messages (requests and responses) on the data line between the
two points. It is especially useful for debugging a host control system to ensure that messages are
correctly formatted and that the required control or data points are being accessed. In particular, the
use of correct offsets in the Modbus protocol can be checked.
Controls - Available to Administrator user level
RTU1 : Selects Serial Port 1 host input.
RTU2 : Selects Serial Port 2 host input.
ETH : Selects the Ethernet port host input (all Ethernet ports are monitored).
Print : Prints the analyser data to a printer attached to the computer.
Save : Saves the analyser data to a file on the computer.
Refresh : Updates the screen with any new data.
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