ABB PGC5000 Generation 2 - 4.10 Sample Handling System; 5 Hardware and Software Features; Function

892 J006 MNAH | PGC5000 G EN 2 | 83
Select available valves from the valve list. The valve button depresses (becomes lighter) when active.
Manual Mode Action Icons are as follows:
Icon
Meaning
Auto Zero: Sets current chart Y axis value to zero.
Chart Reset: Resets current chart X axis value to current time.
4.10 Sample handling system
The PGC5000 software controls and collects data from a modular, CANopen ANSI/ISA SP76.00.02-
2002 standard SHS.
This software includes:
⎯ Digital SHS Valve control with Alarm Status
⎯ Sample Temperature Alarm Status
⎯ Sample Pressure Alarm Status
⎯ Sample Flow Alarm Status
⎯ Filter Differential Pressure Alarm Status
⎯ Reading Analog Inputs
All alarm indicators are configurable for OPC and/or MODBUS data transmission to validate analyses
from the PGC and provide overall SHS health.
5 Hardware and software features
5.1 Function
Figure 5-1 shows a typical analytical flow system, using the flame ionization detector for illustration.
Connections at the right side of the analyzer cabinet provide all gas and air inputs. Sliding plate
valves, liquid sample valves, or a combination of both, provide control and measurement of the
sample. Each analytical valve is air-actuated by an electrical solenoid valve, which in turn is controlled
by the DTC. An operational cycle for the valves consists of three modes: sample purge, sample inject,
and backflush. In the sample purge mode, sample flows through the sample loop to vent. In the
sample inject mode, the sample valve switches, a plug of sample is swept by the carrier through the
column train to the detector. In the backflush mode, the carrier backflushes Column 1 to vent.