Theory Of Operation; Sample Mode; Hmi Mode - Honeywell ERX350 User Manual

1 About ERX350
1.3 Theory of Operation

1.3 Theory of Operation

This section provides information about the modes of operation of the instrument and the functions
performed in each of the modes. ERX350 has three operating modes. Each mode is well defined and
suited to a particular purpose.
The three operating modes are:

Sample Mode

HMI Mode

Serial Link Mode
1.3.1 Sample Mode
In Sample Mode, the instrument obtains, stores and compares pressure(s), temperature(s), and power
supply voltage readings with alarm limit set points. If a reading exceeds its alarm limit set points, the
instrument transmits a single pulse out the alarm channel and shows the 'Alarm Bell' icon on the LCD. If
the instrument is equipped with a modem and configured for Alarm Call-in, the ERX350 will dial a pre-
defined phone number or IP address, presumably to a host computer system waiting to receive such calls.
1.3.2 HMI Mode
The table below shows the default display items and live enable.
Item Code
530
531
532
533
534
535
536
Honeywell
2023
Instrument Configuration
P PP
Display List 1 Items 1-6
580 580
582 582
583 583
503 503
521 521
255 255
Live Display Enable
P PP
PPP PT
580 580
582 582
583 583
503 503
521 521
255 255
PPP PT
PPT PPPT
580 580
582 582
583 583
503 503
521 521
255 255
PPT PPPT
T
580
582
583
503
521
255
T
6