KEYENCE Visual KV Series - Manual (Page 305)

6.2 High-speed Counters
KV
-300
KV-10/80
3-281
1 6
Chapter 6 Interrupts, High-speed Counters, Positioning Control
CTH0 value
ON
OFF
CTC0
CTH0 value
ON
OFF
CTC0
CTC1
Special utility relay settings and output statuses
■ 16-bit high-speed counter (CTH0) and special utility relays (2103 to 2112)
By setting the special utility relays 2104 to 2112 at startup or changing these relays
during generation of clock pulse, you can select ON/OFF of output relay 0500 as
listed below.
These special utility relays also allow you to set the pulse cycle and pulse width
and enable or disable the direct output.
• Special utility relay must be ON when clock pulse is generated.
• Only one of relays 2104 to 2107 and one of relays 2108 to 2111 can be
turned ON. When two or more of the relays among each group are ON,
priority is given to the relay with the smallest No.
• Turning OFF special utility relays 2104 and 2108 enable direct output.
Because these relays are factory-set to ON, be sure to set them to OFF.
• ON/OFF status of special utility relays 2104 to 2112 is set using SET and
RES instructions or STA instruction.
• Be sure to turn the special utility relay 2103 or 2112 ON to change the
pulse width. Turn ON 2103 or 2112 to change the pulse cycle.
• Turn OFF 2105 to start clock pulse output. Turn ON 2105 to stop pulse
output.
• When special utility relays 2104 and 2108 are turned ON while the direct
clock pulses are being output, the status of the output relay 0500 is output
and the pulses will be stopped.
■ Timing diagram of 0500 with special utility relay settings
•
ON-OFF ratio of 1:1 • Variable pulse width
Settings of special utility relays Settings of special utility relays
CAUTION
2103 ON 2112 OFF
2104 OFF 2108 OFF
2105 OFF 2109 OFF
2106 OFF 2110 OFF
2107 ON 2111 OFF
2103 ON 2112 OFF
2104 OFF 2108 OFF
2105 OFF 2109 ON
2106 ON 2110 OFF
2107 OFF 2111 OFF
Pulse status at CTH0 (current value) = CTC (preset value)
Comparator No. Relay No. Pulse status at ON.
CTC0 2103 Automatically clears current value of CTH0.
2104 Disables output to 0500.
2105 Outputs OFF to 0500
2106 Outputs ON to 0500.
2107 Inverts output to 0500.
CTC1 2112 Automatically clears current value of CTH0.
2108 Disables output to 0500.
2109 Outputs OFF to 0500
2110 Outputs ON to 0500.
2111 Inverts output to 0500.
KVNKA Chap 06.p65 08.3.11, 0:10 PM 281