Chapter 4 Relay Ladder Logic Programming 57
Timer Instructions
The SG2 includes a total of 15 separate timers that can be used throughout
a program. Each timer has a choice of 8 operation modes, 7 for general
purpose timing and 1 (mode 7) for a pulse timer. Additionally, each timer has
6 parameters for proper configuration. The table below describes each
configuration parameter and lists each compatible memory type for
configuring counters.
Note:
Symbol
Description
Compatible
Instructions
Range
c
Timer Mode (0-7)
Inputs
I1-IC / i1-iC
Time
Unit: 1 : 0.00 - 99.99 sec
Z1-Z4 / z1-z4
2 : 0.0 - 999.9 sec
Outputs
Q1-Q8 / q1-q8
3 : 0 - 9999 sec
Auxiliar
y
coil
M1-MF / m1-mF
d
4 : 0 - 9999 min
Expansion
inputs
X1-XC /x1-xC
ON: the timer reset to zero
Expansion
outputs
Y1-YC / y1-yC
e
OFF: the timer continues to time
RT
C
R1-RF / r1-rF
f
Current timer value
Counter
C1-CF / c1-cF
g
Timer preset value
T
i
mer
T1-TF / t1-tF
h
Timer Coil Number (C1 ~ CF total: 15 timers)
Analog
comparator
G1-GF / g1-gF
Normal close contact
Lo
※ The target setting value of the counter could be a
constant or the present value of the timer, counter, analog
input A1~A8 and analog gain+offset value V1~V8.
Timer Mode 0 (Internal Coil)
Mode 0 Timer (Internal Coil) used as internal auxiliary coils.
No Timer preset value. In the example below shows the
relationship between the numbered block diagram for a
Mode 0 timer, the ladder diagram view, and the software Edit
Contact/Coil dialog box.