Timer Current Values (V Data Type); Counters And Counter Status Bits (Ct Data Type) - Automationdirect.com DL05 User Manual

Chapter 3: CPU Specifications and Operation

Timer Current Values (V Data Type)

1 1
As mentioned earlier, some information is automatically
stored in V-memory. This is true for the current values
2 2
associated with timers. For example, V0 holds the
current value for Timer 0, V1 holds the current value
for Timer 1, etc.
3 3
The primary reason for this is programming flexibility.
The example shows how you can use relational contacts
4 4
to monitor several time intervals from a single timer.
5 5
6 6
Counters and Counter Status Bits (CT Data
7 7
type)
Counter status bits that reflect the relationship between
8 8
the current value and the preset value of a specified
counter. The counter status bit will be on when the
current value is equal to or greater than the preset value
9 9
of a corresponding counter.
Each time contact X0 transitions from off to on, the
10 10
counter increments by one. (If X1 comes on, the
counter is reset to zero.) When the counter reaches the
11 11
preset of 10 counts (K of 10) counter status contact CT3 turns on. When CT3 turns on,
output Y2 turns on.
12 12
Counter Current Values (V Data Type)
13 13
Just like the timers, the counter current values are
also automatically stored in V-memory. For example,
14 14
V1000 holds the current value for Counter CT0,
V1001 holds the current value for Counter CT1, etc.
The primary reason for this is programming flexibility.
a A
The example shows how you can use relational contacts
to monitor the counter values.
B b
C c
D D
3-24 DL05 Micro PLC User Manual, 6th Edition, Rev. D
X0
TMR
V1 K30
V1 K50
V1 K100
V1 K75
X0
CNT
X1
CT3
X0
CNT
X1
V1003 K1
V1003 K3
V1003 K8
V1003 K5
T1
K1000
Y2
OUT
Y3
OUT
Y4
OUT
CT3
K10
Y2
OUT
CT3
K10
Y2
OUT
Y3
OUT
Y4
OUT