KEYENCE Visual KV Series - Manual (Page 306)

6.2 High-speed Counters
KV
-300
KV-10/80
3-282
6
Chapter 6 Interrupts, High-speed Counters, Positioning Control
■ 16-bit high-speed counter (CTH1) and special utility relays (2203 to 2205,
2208 to 2212)
By setting the special utility relays 2204 to 2205 and 2208 to 2212 at startup or
changing these relays during generation of clock pulse, you can select ON/OFF of
output relay 0501 as listed below.
These special utility relays also allow you to set the pulse cycle
• Special utility relay must be ON when clock pulse is generated.
• Only one of relays 2208 to 2211 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 ON special utility relay 2204 and turning OFF special utility relay
2208 enable direct output.
• ON/OFF status of special utility relays 2204 to 2212 is set using SET and
RES instructions or STA instruction.
• Be sure to turn the special utility relay 2203 or 2212 ON to change the pulse
width.
• Turn ON 2203 or 2212 to change the pulse cycle.
Turn OFF 2205 to start clock pulse output. Turn ON 2205 to stop pulse
output.
• When special utility relays 2204 and 2208 are turned ON while the direct
clock pulses are being output, the status of the output relay 0501 which is
used in the program is output and the pulses will be stopped.
Timing diagram of 0501 with special utility relay settings
• Variable pulse width • ON-OFF ratio of 1:1
Settings of special utility relays Settings of special utility relays
CTH1 value
ON
OFF
CTC2
CTH1 value
ON
OFF
CTC2
CTC3
CAUTION
2203 ON 2212 OFF
2204 ON 2208 OFF
2205 OFF 2209 OFF
2206 OFF 2210 OFF
2207 ON 2211 OFF
2203 ON 2212 OFF
2204 ON 2208 OFF
2205 ON 2209 ON
2206 OFF 2210 OFF
2207 OFF 2211 OFF
Pulse status at CTH1 (current value) = CTC (preset value)
Comparator No. Relay No. Pulse status at ON.
CTC2 2203 Automatically clears current value of CTH0.
2204 Disables output to 0501.
2205 Outputs OFF to 0501
2207 Inverts output to 0501.
CTC3 2212 Automatically clears current value of CTH0.
2208 Disables output to 0501.
2209 Outputs OFF to 0501
2210 Outputs ON to 0501.
2211 Inverts output to 0501.
KVNKA Chap 06.p65 08.3.11, 0:10 PM 282