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Holding register 60 (HR60)
Number = Bit no. in HR
A set bit is indicated by
number
Bit value
Sensor breakage
Default values read
–
Mode switch faulty
Boiler switch faulty
Correction switch for flow temp. faulty
Unauthorized access
Error alarm of a binary input
Error alarm WMZ M-Bus
Data error alarm from WMZ
–
Fault alarm binary input changed
Holding register 61 (HR61)
Number = Bit no. in HR
A set bit is indicated by
Bit value
Error thermal disinfection
–
–
Error Boiler 1, 2 or Pump Pu1,2, or
Temperature exceeded limit
Example of a transfer to the control system:
The error status register is transferred as a word <w> in a holding register (HR) whose content is
represented by the total of the value <z> of the active data bit:
<w> = ([D0] x <1> + [D1] x <2>) + ... + ([D11] x <2048>)
on the right of
on the right of number
0 1 2 3 4 5 6 7 8 9 10 11
0
1
2
3
2
2
2
2
2
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
0 1 2 3
0
1
2
3
2
2
2
2
D0
D1
D2
D3
Operational faults
4
5
6
7
8
9
2
2
2
2
2
EB 5474 EN
10
11
2
2
63
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