Normal Operating Mode; Critical Fault Mode; Data Load Mode - Honeywell JetWave MCS-8562 Installation And Maintenance Manual

SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
While in System Initialization Mode, the RS422, discrete signal and the Ethernet interfaces are
available and active on all the JetWave™ MCS-8562 Terminal LRUs which are powered up. In
Modman, when powered up, the power supply to APM is available on Modman P23B connector.
When power is applied to the KANDU LRU, the Antenna Power and IMU power is available on the
KANDU receptacle J2. Refer to the applicable interconnection diagrams for the electrical
specifications of these interfaces.
There is no timeout for system initialization since the Modman, the BUC-HPA, and the KANDU
LRUs (which power the OAE) are powered independently from the aircraft power supply.
Once the communication with other LRUs is established, the BITE parameters of other LRUs are
extracted and more system wide testing is performed. The system wide testing includes the
hardware compatibility checks, software part number compatibility check, checking for availability
of important input data and configuration files, etc. If there are no critical failures, the system enters
into the Normal Operating Mode.
C.

Normal Operating Mode

In Normal Operating Mode, the RF transmission is enabled and satellite connection is initiated
subject to the system meeting the following conditions – aircraft is in the air, there is no geographic
restriction, the antenna has a line of sight to the satellite, and the system has completed Cable
Calibration and Antenna Alignment. Ground operation is possible if the GTE is asserted. The user
traffic can be started once the antenna is pointed correctly to the satellite and the terminal locks
on to the satellite for providing the connectivity. The system enables all the supported services like
continuous BITE, SNMP, GUI, user services, etc. in this mode.
AES remains in Normal Operation Mode until either the occurrence of a critical fault, or it is
commanded to another mode. Operation with the Modman internal modem vs. the External Modem
are sub-modes of Normal Operation Mode. In the external modem mode, satellite information such
as frequency band and satellite target is entered into the mission configuration via the GUI, and
signal to the BUC-HPA is switched to the external modem with the IF switch. In the internal modem
mode, the IF signal path is switch back to Modman with the IF switch.
The system enters the Normal Operating Mode approximately 5 minutes after continuous power
is applied to the last LRU.
D.

Critical Fault Mode

The system enters into Critical Fault Mode when any LRU reports a critical fault that cannot be
recovered and will affect satellite connectivity. The RF transmission is muted and user services
are disconnected. The system may support minimal services like SNMP, continuous BITE, GUI,
etc. in this mode. The system reboots in an effort to recover from Critical Fault Mode.
E.

Data Load Mode

The system enters Data Load Mode when aircraft is on ground and local data load discrete on the
Modman is asserted. The SNMP, GUI, and continuous BITE services may not be supported in
data load mode. The RF transmission is disabled in data load mode. The Modman provides ARINC
615A Ethernet data loading to itself and other LRUs through its own interface in Data Load Mode.
Data Load mode can be entered from "Normal Operating Mode", "System Initialization mode", or
"Critical Fault Mode". The system will exit Data Load Mode once the local data load discrete is
de-asserted.
EFFECTIVITY
ALL
© Honeywell International Inc. Do not copy without express permission of Honeywell.
JetWave™ MCS-8562 Terminal
23-15-84
Page 1-9
11 Nov 2020