1 System overview
XSeriesG4 Remote Controller User's
manual
2103334 Rev. AB
| 15
–
RAMS (alarming, exception reporting)
–
Operators (simple math/logic functions)
–
IEC 61131 (complex math/logic)
–
Selectable units (user selectable engineering units)
–
Display/keypad handler
–
I/O subsystem
–
Tank level application
–
Therms master application
–
Therms slave application
–
Multiple protocols (Totalflow proprietary low power, MODBUS
®
slave (RTU/ASCII), MODBUS
®
master (RTU/ASCII),
LevelMaster, Btu 8000/8001, Enron MODBUS
®
, MotorSaver
®
, ABB XMV multivariable, Altronics and others
XRC
G4
application licensing
The G4 (fourth generation) flow computers offer the user unrivaled power and flexibility. The G4 units can support far more
applications than the G3 (third generation) devices. Some of these applications require that Totalflow pay a royalty to a third
party vendor. For this reason, Totalflow has developed a credit system for handling application loads beyond what would be
required for a typical G3 meter run. Application credits are required to instantiate many of the applications. From the factory, the
G4 unit has four general credits installed. Several system configurations are possible with those four general credits, for
example:
–
AGA-3 (1 credit) with Valve Control (1 credit) and Trending (1 credit) using 3 general credits total
–
Two AGA-3 (or AGA-7) tubes (1 credit each tube) with Trending (1 credit) using 3 general credits total
–
AGA-3 (1 credit) with Valve Control (1 credit) and Plunger Lift (1 credit) using 3 general credits total
Applications have been divided into categories: Standard, general, IEC, CO2 and HCDP (hydrocarbon dew point). Other
application categories may be created in the future.
Standard applications typically support general applications, as well as the basic operation of the G4 units. Standard
applications do not require any credits to be instantiated.
Standard applications include:
–
System application
–
Communications
–
I/O subsystem
–
Therms Master
–
Therms Slave
–
Analysis Trend System
–
LevelMaster
–
Operations
–
XMV interface
–
Holding registers
–
Units conversion
–
Host interface
–
Displays
General applications typically provide some type of measurement, control, logging or archival function.
General applications include:
–
LMV interface (future)
–
NGC client
–
AGA-3 measurement