iDect FC6A series User Manual page 210

5: F S
UNCTIONS AND ETTINGS
■ Overflow
When the current value exceeds 4,294,967,295, the special internal relay turns on for only one scan. When the current value
overflows, it becomes 0.
Group
Overflow
■ Underflow
When the current value falls below 0, the special internal relay turns on for only one scan. When the current value underflows, it
becomes 4,294,967,295.
Group
Underflow
■ Comparison output reset
When the special internal relay turns on, the comparison output selected on High-speed Counter Settings turns off.
Group
Comparison Output Reset
■ Reset input
When reset input is turned on, the current value returns to the reset value.
Reset input
Current value N-1
Group
Reset Input
■ Preset value, reset value storage locations
The preset value and the reset value for the high-speed counter are stored in special data registers as 2 words.
Group
Preset Value (Upper word)
Preset Value (Lower word)
Reset Value (Upper word)
Reset Value (Lower word)
In the WindLDR Function Area Settings, when 32-bit Data Storage Setting is set to From Lower Word, the lower word
is stored in the first device.
■ HSC reset input and reset status
When the HSC reset input is enabled in group 1 or group 5, turn on HSC reset input I2 or I5 to return the current value to the
reset value.
In this situation, reset status turns on for only one scan.
HSC reset input
Reset status
Current value N-1
Group
HSC Reset Input
Reset Status
To use the reset input with the group 1 or group 5 single-phase high-speed counter, use I2 or I5. When not using I2 or I5 as an
external clear input, they can be used as normal input.
■ Count direction flag
These special internal relays maintain whether the Group 1 or Group 5 current value is being added or subtracted.
When these special internal relays are on, they indicate addition. When they are off, they indicate subtraction.
Group
Count Direction flag
5-24
1 2
M8161 M8055
1 2
M8162 —
1 2
M8030 M8051
N N+1
1 2
M8032 M8053
1 2
D8212 D8194
D8213 D8195
D8216 D8196
D8217 D8197
N N+1
1 2
I2 —
M8130 —
1 2
M8027 —
FC6A S M S A
ERIES ICRO MART LL
3 4
M8165 M8166
3 4
— —
3 4
M8034 M8040
Reset value (initial value)
3 4
M8036 M8042
3 4
D8220 D8224
D8221 D8225
D8234 D8236
D8235 D8237
One scan
Reset value (initial value)
3 4
— —
— —
3 4
— —
- -O T U ' M
IN NE YPE SER S ANUAL
5 6
M8163 M8063
5 6
M8164 —
5 6
M8044 M8057
5 6
M8046 M8061
5 6
D8228 D8200
D8229 D8201
D8232 D8202
D8233 D8203
5 6
I5 —
M8135 —
5 6
M8043 —
FC9Y-B1722
Read/Write
R
Read/Write
R
Read/Write
R/W
Read/Write
R/W
Read/Write
R
R/W
Read/Write
—
R
Read/Write
—