ABB AC 31, Technical Manual

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Programming
ABB Control - AC 31
Page 5-25
1SBC 260400 R1001-b 06.99
The clock update is carried out with each validation of the I 62.01 input, and as long as that
input is active. The information in the KW001.00 to KW001.07 inputs are then copied to the
clock .
A parameter error is signaled in the output variable M001.00 and the exact error description in
MW001.00.
The current values of the central unit clock are accessible in MW 000.00 to MW 000.06. These
are the same values that are in IW 62.08 to IW 62.14.
The UHR block will only execute if the I 62.00 input is active.
Passage to the year 2000
The passage into the year 2000 will not generate a system stoppage at any time. The clock
ensures a continued passage without ambiguity between the years 1999 and 2000.
The clock parameters will change from:
- Year 99, month 12, 23 h 59 min 59 s
- to year 00, month 01, 00 h 00 min 00 s.
The years 2000, 2004, 2008 and so on are recognized as leap years.
4.1.16. Password
A password can be defined to deny central unit write access to unauthorized persons.
The password is given by the AC31GRAF software in the configuration window by clicking on
the
"Password protection" icon (see Figure 5-5). The password is composed of 4 hexadecimal
values (from 0 to F) (see Figure 5-6). It is invalidated by clicking on the "Password protection"
again and re-entering the password (see Figure 5-7).
4.2. CS31CO configuration function block
The CS31CO function block enables the configuration of certain remote units and obtains their
current configuration.
The description of each unit indicates whether a remote unit or extension requires
configuration with the CS31CO block.
The possible configurations, depending on the units, are:
- Configuration for detecting a cut wires on an input or binary output
- Configuration, for configurable Input / Output units, of a channel as an input or output
- Configuration of analog Inputs / Outputs as current or voltage
(30 and 90 series)
- Configuration of the filtering time of a binary input.
A detailed description of the function block is available in the AC31GRAF software help as well
as in the documentation.