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Instruction 20 (Power Supply Status Request)
Message
Byte No.
1
2
3
4
5
6
8
9
Instruction 20 (System Status Request)
Message
Byte No.
1
2
3
4
5
6
7
Instruction 21 (Module Status Request Reply)
Due to the ability of the DBUH/DLAH to accept differing module types into it, the module status request reply may
vary between these different module types.
Message
Byte No.
1
2
3
4
5
6
8
9
29
33
34
38
39
40
41
42
43
47
64
66
If the channel is missing then the value of the rest of the bytes in the message is
undetermined.
Issue 3.20
Set Value /
(example)
02
?
?
20
'P'
'01'
?
03
Set Value /
(example)
02
?
?
20
'S'
?
03
Set Value /
(example)
02
?
?
21
'M'
'01'
'-'
' MLAH175'
'+123'
'0'
'....'
'0'
'0'
'0'
'0'
'0'
'....'
('23/12/02 12:34:56')
?
03
DBUH / DLAH / DTLH Installation and Operation Handbook
Length
(bytes)
1
STX
1
No of bytes in message
1
Address
1
Message instruction
1
Power supply
2
Power supply number
1
Checksum
1
ETX
Length
(bytes)
1
STX
1
No of bytes in message
1
Address
1
Message instruction
1
System
1
Checksum
1
ETX
Length
(bytes)
1
STX
1
No of bytes in message
1
Address
1
Message instruction
1
Module
2
Module number
1
Module State:
Module Missing 'X'
Module Warmup 'W'
Module Reference Warmup 'R'
Module Present '-'
20
Module name/type
4
Attenuation asked for in 0.1 dB steps,
'+123' = 12.3dB
1
External Reference
'X' = Not present
'L' = Locked
'U' = Unlocked
4
NOT USED
1
Summary Alarm
'0' = OK '1' = FAULT
1
External Reference Fault
'0' = OK '1' = FAULT
1
PLO Fault
'0' = OK '1' = FAULT
1
Amplifier Fault
'0' = OK '1' = FAULT
1
Attenuator Fault
'0' = OK '1' = FAULT
4
NOT USED
17
OK Since time/date string, if there is a
fault then the string is blank.
1
Checksum
1
ETX
Description
Description
Description
Page 16
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