Max300-LG : Description - Specifications - Installation Guide
Extrel
Core Mass Spectrometers
Page 12
Please follow the Questor5 Software Manual in the Manuals folder of the Thumb
drive/CD Rom supplied.
Communications
MAX300-LG communicates with the control PC via either USB or Ethernet,
depending on the setup. Details on setting up either is available in the Questor5
Software Manual.
Optional External Communications
The MAX300-LG can use several external communications protocols. These
communications protocols enable the MAX300
™
-LG to transmit data to outside controls
or data systems. The MAX300
™
-LG can transmit instrument parameters, alarms and
derived (calculated) values. In addition the MAX300
™
-LG can receive data from outside
sources that can be incorporated into derived value tags or alarm tags to yield a final
result that is more informative than the mass spectrometer data alone.
OPC
OPC stands for Object Linking and Embedding [OLE] for Process Control. Support for
OLE is built into the Windows
®
and Macintosh
®
operating systems. OPC treats data as
collections of objects to be shared by applications supporting the OLE specification. OPC
provides extensions to OLE to support process control data sharing. The MAX300
™
-
LG’s implementation of OPC communication option, an OPC server, is accessed on the
local network via the instrument’s Ethernet port.
Questor I/O
The native Questor I/O communications protocol is built into the MAX300-LG software
and hardware. This communications protocol gives direct access to the digital I/O and
analog inputs on the baseboard module at J-41. The digital channels will accept TTL
level signals. Physical access to this communication channel is via connections on the
rear of the instrument
Questor Modbus
The Modbus protocol, developed by Modicon Corporation, is a communication protocol
for the software. The MAX300
™
-LG is capable of acting as Master and/or Slave type of
device on any available serial port on the embedded server. If the Modbus TCP/IP option
is purchased, the Modbus communication will be carried out through the same Ethernet
connections as used for the LAN connection to the server PC. By using Modbus, data
generated by the mass spectrometer are available to external control or data logging
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