Control System; Data Acquisition Computer; Programmable Logic Controller - Honeywell Vertex M Technical Handbook

Vertex M 24-Point Continuous Monitor
TM
Optional manifold for multiple-gas monitoring.

1.10 Control System

The Vertex M control system is a redundant system
consisting of a central data acquisition computer (DAq),
a programmable logic controller (PLC) and one or more
analyzer modules.
Primary
Communications
Alarms and Faults
Az Az
Data
Communications
Prgramming
and Display
Figure 1-1. Communications Path
Section 1 - Introduction
PLC
Secondary
Communications
Az
Alarms and
Faults Should
Primary Fail
DAq
Above is a simplified block diagram of the communications
path of the control system. The analyzer modules and
PLC are microprocessor controlled and contain non-
volatile memory.

1.10.1 Data Acquisition Computer

The data acquisition computer (DAq) is the central
processor for the Vertex M System. It configures the
analyzers, stores data and provides a network interface
for data transfer to other computers. System display
and operator control is through an LCD touchscreen w/
on-screen keyboard or included external keyboard.
CAUTION
OPC on TCP/IP via Ethernet not recommend-
ed for alarm annunciation.

1.10.2 Programmable Logic Controller

The Programmable Logic Controller (PLC) is the
control system path between the DAq and the
individual analyzers. The PLC polls the analyzers for
current information, activates relays which may be
connected to external alarms and provides external
communications.
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