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App. - 22
Appendix 4.15 Setting counters externally
With an external digital switch having 4 digits, a counter can be set remotely and
their current values are displayed in 4 digits. In addition to every count-up, the timer
outputs data when it reaches a value 100 short of the set value and a value 50 short
of the set value.
Note that a setting error is indicated if the set value of the counter is less than 100.
PB
Setting signal
X0
PB
Start
X5
PB
Reset or stop
X1
Count pulse
X3
DC24V
X0 to 1F
I/O
UNIT0
X20 to 2F
I/O
UNIT1
Y70 to 74
I/O
UNIT4
Y60 to 6F
I/O
UNIT3
Y74
Y73
Y72
Y71
AC100V
RL
R1
R2
R3
RL
Setting error
ON during
operation
Turns on 100
short of set value
Turns on 50
short of set value
Turns on at
counter stop
DC12V
Current value display
BCD × 4 digits
DC12V
1 2 3 4
Digital switch (BCD × 4 digits)
Y70
Setting error range
Maximum setting value 9999
Start
Turn on X5
Y71 ON
100 short of set value
Y72 ON
50 short of set value
Y73 ON
Count up
Y74 ON
Setting value