Programming (Configuring) The Gauge; Introduction Into Programming - Honeywell 854 ATG Series Instruction Manual

3.3 Programming (configuring) the gauge

3.3.1 Introduction into programming

The 854 ATG is a field-configurable multi-processor
instrument. The instrument can be totally programmed
out in the field, or remotely, without opening the gauge.
It is recommended to use an 847 PET (Portable Enraf
Terminal) to load the different parameters.
It is coupled to the 854 ATG via an infra-red coupling.
The 847 PET is intrinsically safe and waterproof (IP65)
and consists of a full ASCII membrane keyboard and
an LCD display (refer to figure 3.5).
Alternatively, the Honeywell Enraf service tool Engauge
can be used to configure the instrument.
The Engauge program runs on a PC under Windows®.
It is recommended to use the service tool to make a
log file of the instrument. A log file contains all
important settings and the information is stored on the
hard disk.
For more information, refer to the Instruction manual
Engauge service tool.
The item concept
All parameters, settings, etc, are accessible via so-called items. These items all have unique 2-letter
abbreviations which allow easy access and programming. In this manual, items are printed bold.
There are three different type of items:
Type of item Description
These will force the gauge to execute a special task or function.
Commands
For example: EX (exit). After the EX command the instrument start initialising and
modified NOVRAM settings become active.
Items for request of setup or measuring data from the gauge.
Data requests
For example: JS (jumper setting). Item JS returns the jumper setting on the XPU(-2)
board. Some of the data items are read-only.
All parameters which can be programmed and should not be lost after power break
NOVRAM settings down, are stored in NOVRAM. The NOVRAM is a non-volatile RAM memory which
does not require battery back up.
Data stored in NOVRAM can be protected by a password and by the Weights & Measures (W&M) jumper on
the XPU(-2) board (refer to figure 3.6).
Protection levels are provided for all NOVRAM items, depending on the importance of an item. Protection
level 1 is protected by password 1 (W1) and protection level 2 is protected by password 2 (W2).
If the NOVRAM is protected by the W&M jumper J(A)3 level 2 NOVRAM items cannot be changed without
opening the gauge, thereby breaking off the sealing.
Most data requests and commands are not password protected.
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Figure 3.5 Programming the 854 ATG by using
the 847 Portable Enraf Terminal
Commissioning