ABB AC 31 Technical Manual page 132

ABB Control - AC 31
1SBC 260400 R1001-b 06.99
Programming
4.1.15. Clock
A clock is available on the 50 series central units (see Figure 5-3).
Drift (typical) 4.3 min / month at 25 °C
The clock parameters are accessible:
Either in the following variables:
IW 62.08 seconds (0...59)
IW 62.09 minutes (0...59)
IW 62.10 hours (0...23)
IW 62.11 days of the week (1...7)
Monday = 1
IW 62.12 days of the month (1...depending on the month)
IW 62.13 months (1...12)
IW 62.14 years (00...99)
Or by using the UHR function
Updating the clock
The clock update can be effectuated in two ways:
Through the AC31GRAF software in the configuration window, by clicking on the "Set PLC
clock" icon (see Figure 5-4).
Through programming using the UHR function.
Here is an example using the UHR function:
%I62.00
%I62.01
%KW001.00
%KW001.01
%KW001.02
%KW001.03
%KW001.04
%KW001.05
%KW001.06
UHR
%M001.00
FREI AKT
%MW001.00
S FEHL
%MW000.00
SEC ASEC
%MW000.01
MIN AMIN
%MW000.02
H AH
%MW000.03
TAG ATAG
%MW000.04
MON AMON
%MW000.05
JHR AJHR
%MW000.06
WTG AWTG
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