Appendix A   Alert List A-4 
 
 
Message Subject  Explanation  Category 
CPU Core#n Clock 
down 
Control 
section 
CPU Core#n clock down  B 
CPU Core#n High 
TEMP 
Control 
section 
CPU Core#n temperature rise 
B 
DATUM(invalid)  INS  DTM sentence validity error  B 
DATUM(unavailable)  INS  DTM sentence not received yet  B 
Depth(invalid) INS Depth data validity error  B 
Depth(unavailable)  INS  Depth data not received yet  B 
DSC(Communication 
failed, Main LAN) 
INS  DSC (Digital Selective Calling) communication 
failure on LAN1 (Main network) 
B 
DSP(Heading Data)  RADAR/
AIS 
Heading data error (heading error that is received 
by companion MPU) 
B 
Echo 
Sounder(Communicatio
n failed, Main LAN) 
INS 
Echo sounder communication failure on LAN1 
(Main network) 
B 
Echo 
Sounder(Communicatio
n failed, Sub LAN) 
INS 
Echo sounder communication failure on LAN2 
(Sub network) 
B 
e-Token(Communicatio
n error) 
Control 
section 
Communication error between the CPU and 
e-Token 
B 
External TT#n(invalid)  INS  TT#n data validity error  B 
External 
TT#n(unavailable) 
INS  TT#n data not received  B 
GIF(Communication 
error) 
Control 
section 
Communication error between the Companion 
MPU and the Gyro IF (USB connection) 
B 
GIF-RIF(Open) Control 
section 
The open state was detected between the GIF and 
the RIF 
B 
GIF-SLC(Open) Control 
section 
The open state was detected between the GIF and 
the SLC 
B 
GPS 
#n(Communication 
failed, Direct) 
INS  GPS#n communication failure on serial port of 
CCU 
B 
GPS 
#n(Communication 
failed, Main LAN) 
INS  GPS#n communication failure on LAN1 (Main 
network) 
B 
GPS 
#n(Communication 
failed, Sub LAN) 
INS  GPS#n communication failure on LAN2 (Sub 
network) 
B 
Gyro 
#n(Communication 
failed, Direct) 
INS  Gyro communication failure on CCU serial port  B 
Gyro 
#n(Communication 
failed, GIF-Direct) 
INS  Gyro IF communication failure on CCU serial port  B