Toshiba GR 200 Series, Instruction Manual

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6F2S1915 (0.46)
GRZ200 (Soft 031 & 032)
- 468 -
Signal acquisition timing must be adjusted in accordance with the application, in that the
acquisition should be regulated for the nature of the signal; hence, several settings are
provided in the GCNT functions. Thirty-two independent GCNT counters† are available. That
is, counters GCNT01 to GCNT32† can operate simultaneously. The values counted are stored
in the non-volatile memory so that they are not erased if the power supply to the IED is
interrupted.
For simplicity, only the GCNT01 function is discussed; the features in the remaining GCNT02–
GCNT32 functions are identical to the GCNT01 function.
3.7.1
Counter setting for a signal
(i)
Setting for count timing
In the GCNT01 function count timing is grouped into three, as shown in Figure 3.7-2 (a, b, and
c). When the user wishes to count the On(Closed), set
On
for the scheme switch [
GCNT01-
CNTS
]; conversely, set
Off
for the scheme switch when the Off(Open) is to be counted.
Additionally,
OnOff
is provided for counting the number of pulses. If the GCNT01 function is
not required, set
NA
for the scheme switch.
a. On (Closed) signals
Counter 1 2 n … …
“ On ” is counted on the rising edge of the pulse
b. Off (Open) signals
Counter 1 2 n … …
“ Off ” is counted on the falling edge of the pulse
c. OnOff (Closed-Open) signals
Counter 1 2 n … …
“ OnOff ” is counted in response to pulses.
Figure 3.7-2 Count types
(ii)
Setting the maximum value
The GCNT01 function is able to count to 2147483647 (=2
31
−1). When the count-value reaches
the value “2147483647”, the count-value returns to an initial-value. If the user wishes to set a
different maximum number in place of “2147483647”, the user can use the setting [
GCNT01-