Annexes
Annexes - Page 4 ABB Control - AC 31
1SBC 260400 R1001-b 06.99
The KW00.00...KW15.15 and KD00.00 variables are called system constants and are only
accessible through the configuration menu of the AC31GRAF programming software.
Diagnosis variables
sum of errors M255.10 indicates that the central unit has detected an error
fatal error Class 1 M255.11 detailed information in MW254.00...MW254.07
serious error Class 2 M255.12 detailed information in MW254.08...MW254.15
light error Class 3 M255.13 detailed information in MW255.00...MW255.08
warning Class 4 M255.12 detailed information in MW255.08...MW255.15
M255.00 oscillator with a frequency of 2 Hz
M255.01 oscillator with a frequency of 1 Hz
M255.02 oscillator with a frequency of 0.5 Hz
M255.03 oscillator with a 1 minute period
M255.15 this bit may be used for detecting the first cycle. It is
always reset to "zero" at each program launch independently
of the bit backup area chosen. This bit may be read
by the user and set to 1 at the end of the first cycle.
Status of the CS 31 bus
IW62.15
bit 0: not used
bit1 = 1: the central unit was initialized on the CS 31 bus (only valid for
the slave central units)
bits 2 to 7: not used
bit 8 to 15: maximum number of units initialized on the CS 31 bus (only
significant for the CS 31 bus master central units).
Clock
IW62.08: seconds (0...59)
IW62.09: minutes (0...59)
IW62.10: hours (0...23)
IW62.11: day of the week (1...31)
IW62.13: month (1...12)
IW62.14: year (0...99)
The clock may be updated with the configuration editor of the AC31GRAF programming
software or by the UHR function.
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