iDect FC6A series, User Manual

Page: 210 / 474

5: F
UNCTIONS AND
S
ETTINGS
5-24 FC6A S
ERIES
M
ICRO
S
MART
A
LL
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IN
-O
NE
T
YPE
U
SER
’
S
M
ANUAL
FC9Y-B1722
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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.
■
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.
■
Comparison output reset
When the special internal relay turns on, the comparison output selected on High-speed Counter Settings turns off.
■
Reset input
When reset input is turned on, the current value returns to the reset value.
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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.
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.
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 1 2 3 4 5 6 Read/Write
Overflow M8161 M8055 M8165 M8166 M8163 M8063 R
Group 1 2 3 4 5 6 Read/Write
Underflow M8162 — — — M8164 — R
Group 1 2 3 4 5 6 Read/Write
Comparison Output Reset M8030 M8051 M8034 M8040 M8044 M8057 R/W
Group 1 2 3 4 5 6 Read/Write
Reset Input M8032 M8053 M8036 M8042 M8046 M8061 R/W
Group 1 2 3 4 5 6 Read/Write
Preset Value (Upper word) D8212 D8194 D8220 D8224 D8228 D8200
R
Preset Value (Lower word) D8213 D8195 D8221 D8225 D8229 D8201
Reset Value (Upper word) D8216 D8196 D8234 D8236 D8232 D8202
R/W
Reset Value (Lower word) D8217 D8197 D8235 D8237 D8233 D8203
Group 1 2 3 4 5 6 Read/Write
HSC Reset Input I2 — — — I5 — —
Reset Status M8130 — — — M8135 — R
Group 1 2 3 4 5 6 Read/Write
Count Direction flag M8027 — — — M8043 — —
Reset input
N N-1 N+1 Reset value (initial value) Current value
HSC reset input
Reset status
N N-1 N+1 Reset value (initial value) Current value
One scan