AH500 Module Manual
7-26
(2) Circular accumulation:
If an accumulation register counts up, it counts from 0 to 999999999. If an accumulation
register counts down, it counts from 0 to -999999999.
If the circular accumulation is larger than the maximum value 999999999 or less than the
minimum value -999999999, bit 2 in CR19/CR47/CR75/CR103 will be turned ON, and the
value in the accumulation register will become 0. If bit 2 in CR19/CR47/CR75/CR103 is not
reset to OFF, it will still be turned ON. If bit 2 in CR19/CR47/CR75/CR103 is reset to OFF, it
will be turned ON next time the circular accumulation is larger than 999999999 or less than
-999999999.
or
ON
OFF
ON
ON
OFF
OFF
999999999
-99 9999999
ON
Operation of a counter
bit0 (parameters for operation)
The circular a ccumulation is equal to
the maximum value or the minimum value.
bit2 (parameters for operation state)
*: T he cycle of upd ati ng t he n umb er of sa mp led p ulses is the c ycle set.
The resetting value of the circular accumulation
is eq ual to the maximu m value or the minimum value.
bit2 (parameters for operation)
Num
e
of accumulate
ulses*
Tim e
The related parameters are described below.
Item Value/Setting value
Parameter
CH0 CH1 CH2 CH3
Number of
accumulated pulses
(Low word)
-999999999~999999999
#22 #50 #78 #106
Number of
accumulated pulses
(High word)
#23 #51 #79 #107
Operating state of a
counter
Bit 2: The circular accumulation
is equal to the maximum value
or the minimum value.
#19 #47 #75 #103
Operation of a counter
Bit 2: Resetting bit 2 in
CR19/CR47/CR75/CR103
#0 #28 #56 #84
6. Bit 5 in CR4/CR32/CR60/CR88: If bit 5 in CR4/CR32/CR60/CR88 is turned ON, the function of
comparing the number of accumulated pulses with the comparison value set is enabled. If bit 5
in CR4/CR32/CR60/CR88 is turned OFF, the function of comparing the number of accumulated
pulses with the comparison value set is disabled.
The number of accumulated pulses is compared with the comparison value set. If the number
of accumulated pulses meets the comparison condition set, bit 3 in CR19/CR47/CR75/CR103
will be turned ON. If bit 3 in CR0/CR28/CR56/CR84 is turned ON, bit 3 in
CR19/CR47/CR75/CR103 will be turned OFF. There are two types of comparison conditions.
One is ≧, and the other is ≦. If an accumulation register counts up, ≧ can be used. If an
accumulation register counts down, ≦ can be used. Users can select a comparison condition
according to their needs.
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