Honeywell HA20, Technical Manual

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HA20 2-Channel Controller
HA20 Technical Manual 2-2
2 Operation
The HA20’s graphic LCD displays monitored data. The 5-button
keypad and the display serve as the system’s operator interface.
All configuration variables are entered using this operator interface
through SETUP menus accessed by pressing
Edit
from either data
screen. This Setup mode may be exited manually by pressing Next ,
or automatically when no keys are pressed for 5 minutes. Alarm relays
and front panel alarm LED indicators remain active during the Setup
mode. Alarm LED’s flash upon new alarms and become steady after
Acknowledged by pressing the
Alarm Reset key. A SECURITY menu
offers a password feature to prevent tampering with HA20 parameters.
A “sign-on” screen appears briefly after power is applied that indicates
what type of input / output options are configured with the unit.
Several signal conditioning input options are available to allow the
HA20 to accept sensor and other analog signals directly (see
Section
3.1
).
2.1 Setup Menu Configuration
Variables within the CHANNEL (see
Section 2.2
) and SYSTEM (see
Section 2.3
) menu trees allow HA20 configuration of a wide range of
monitoring applications. Select the desired menu by scrolling with Up/
down arrows and then Edit to enter each menu. Figure 2-1 illustrates
the menu tree configuration with Channel variables on the left and
System variables on the right. Channel variables affect only the specific
channel selected while System variables are related to features not
specific to either channel.
HA20 Dual Channel Controller Menu
Tree
Figure 2-1. Menu Tree