Installation and Operating Handbook
4.2.4.3
Instruction 47 (Redundancy change request)
When a unit is in a 1 for 1 configuration all the parameters can be modified apart from the unit priority, however
the ’unit to go online’ parameter can only be modified when in manual mode and it is being changed on the
currently offline unit.
When a unit is in a 1 for 2 configuration if the unit is selected as standby, then all the parameters can be
modified apart from the unit priority. However, if the unit is selected as either A or B, then only the priority can
be changed for that particular unit.
Table 4.14: Redundancy change request message format (instruction 47)
Message
byte no.
Set value / example
Length
(bytes)
Description
1
02
1
STX
2
9
1
Number of bytes
3
32
1
Unit address
4
47
1
Instruction number
5
'M'
1
Redundancy mode
’M’ = Manual
’A’ = Auto
6
'A'
1
Unit to go online
’A’ or ’B’ when in 1 for 1 configuration
’A’ or ’B’ or ’S’ when in 1 for 2 configuration
N/A when in 1 for n configuration
7
'1'
1
Unit priority
’X’ when in 1 for 1 configuration or if units are se
lected as standby
’1’ or ’2’ when in 1 for 2 configuration
’1’ .. ’8’ when in 1 for n configuration
8
?
1
Checksum
9
03
1
ETX
PBU2000
Peak Communications Ltd.
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Summary of Contents for PBU2000
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