eg 1234 = 12.34A (x100, 0 to 50 amps)
1013 41014 UINT16 rw/nv deviation threshold for alarm feature, percent * 100.
eg 1234 = 12.34% (0 to 100%)
1014 41015 UINT16 rw/nv deviation minimum time for alarm feature, in seconds.
(0 to 3600 seconds)
1015 41016 UINT16 rw/nv Channel disable: Bitmap of channels to disable
(0x00 = all 12 enabled, 12 bit: 0x00 to 0xFFF)
1016 41017 UINT16 w Ave-clear: write any value to clear long average.
(read returns zero)
1017 41018 INT16 ro reserved
1018 41019 INT16 ro reserved
1019 41020 UINT16 ro reason for reboot. 0x01=POR, 0x02=EXTR 0x04=WDTR 0x08=BODR,
0x8000=WDTOF
1020 41021 INT16 ro Powersupply, +5v rail. (x100, eg 567 = 5.67v)
1021 41022 INT16 ro reserved
1022 41023 UINT16 ro number of available current channels on system.
A90DC-12 = 12.
Use for register 41016 to find maximum bits allowed.
1023 41024 UINT16 ro number of available analog input channels on the system
(A90DC-12 = 1)
1024 41025 UINT32 ro MSW bitmap of available analog input modes.
1025 41026 -- LSW
0x0002 = Analog 4-20mA mode (only one mode supported)
1026 41027 UINT16 rw/nv Data polarity of current readings: Normal = 1, Inverted = 0.
It effects all instantaneous and long averages, Reg. #40001-
40006, and #40011-40034.
Analog input: Current Mode:
instantaneous
: The instantaneous reading will report the present status of the input, represented in ohms, mA, or volts. The
value uses a short term average of the last 16 a/d converter readings to compute the value of this register. In voltage and
current mode, the instantaneous value is calculated several times per second. In resistance mode, the value is calculated at
least every two seconds. 0xFFFFFFFF will report an off-scale-high condition, or any other invalid data.
average
: This register reports the longer term average of the input. Each time a short term average is calculated with all-new
samples, the value is added to the cumulative average. This value should be reset using the clear min/max register at least
once per hour. If not cleared, it will eventually start a moving average after memory storage is exceeded. The AcquiSuite
will clear this register a the start of each data logging period.
min
: the minimum value seen in the instantaneous register.
max
: the maximum value seen in the instantaneous register.
Multipliers
: The register value for inst, average, min, and max must be divided by 1000 to convert the number to mA.
Current mode reports 0 to 20.000mA.
clear
min/max (register 41017): This register clears the values for average, min, and max. The historical accumulation of
samples for the average field will be cleared, and average, min, max will be set to the present instantaneous value after the
next instantaneous value is recalculated.
Page 13
A90DC-12 – DC Current Monitor
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