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7
LADDER PROGRAMMING: ELEMENTS & FUNCTION BLOCKS
In ladder programming, the ladder elements and functional blocks are connected to create the logic needed for any application. The following section gives the
description of each element that is used in SPR-soft III ladder programming.
INPUTS
The Series 900 relay provides two types of inputs: digital and analog
AC Model: Digital Inputs (1 - 8)
DC Model: Digital Inputs (1 - 6), Analog Inputs (V1, V2)
OUTPUTS
The Series 900 relay provides digital outputs: Base Module (4), Expansion
Module (4). The outputs can be congured as:
i. State Change (Contactor), ii. Level Change (Remote Control), iii. Bi-stable (Set
Reset)
TIMERS
The Series 900 relay provides 16 timers which can be congured as:
i. ON Delay, ii. OFF Delay, iii. Single Shot, iv. Cyclic ON/OFF, v. Cyclic OFF/ON,
vi. Make Interval, vii. Break Interval, viii. Delayed Make Interval, ix. Make/Break
Interval OFF/ON, x. Make/Break Interval ON/OFF
ANALOG COMPARATORS
The Series 900 relay provides 12 analog comparators which can be used for
comparison between values of two analog signals or between an analog
signal and any absolute value.
TIME SWITCHES
The Series 900 relay provides 16 time switches which can be used for daily or
weekly applications.
COMPARE COUNTERS
The Series 900 relay provides 16 compare counters which can be used for
comparison between values of two counters or between a counter and any
absolute value.
i. Up Counter, ii. Down Counter
AUXILIARY RELAYS
The Series 900 relay provides 64 auxiliary relays which can be used to expand
a rung from one line to another line. It can be congured as:
i. State Change (Contactor), ii. Level Change (Remote Control), iii. Bi-Stable (Set
Reset)
Z-KEYS
Z-Keys are soft keys located on the front of the device. They behave exactly
like the physical inputs (discrete inputs). The only dierence is that they do
not correspond to smart relay connection terminals, but to the four gray
buttons on the front panel.
COUNTERS
The Series 900 relay provides 16 counters which can be congured as:
i. Up Counter, ii. Down Counter
SOFT TEXT MESSAGES
The Series 900 relay provides 16 soft text message blocks which can be used
to display text messages, the preset value and current value of any special
function block or the current date and time. Z-Keys can be used as navigation keys for current displayed menu.
To access the Z-Keys while the program is running, press the ALT key,
then press Z1 - Z4.
I1, I2, ..... I8
Normally
Open (NO)
Contact
Base Module
J1, J2, ..... J8 Expansion Module 1
K1, K2, ..... K8 Expansion Module 2
L1, L2, ..... L8 Expansion Module 2
Q1, Q2, ..... Q4
Normally
Open (NO)
Contact
Base Module
U1, U2, ..... U4 Expansion Module 1
V1, V2, ..... V4 Expansion Module 2
W1, W2, ..... W4 Expansion Module 2
i1, i2, ..... i8 Normally
Closed
(NC)
Contact
Base Module
j1, j2, ..... j8 Expansion Module 1
k1, k2, ..... k8 Expansion Module 2
l1, l2, ..... l8 Expansion Module 2
q1, q2, ..... q4 Normally
Closed
(NC)
Contact
Base Module
u1, u2, ..... u4 Expansion Module 1
v1, v2, ..... v4 Expansion Module 2
w1, w2, ..... w4 Expansion Module 2
T1, T2, ..... T16 Timer Coil/Normally Open (NO) Contact
t1, t2, ..... t16 Normally Closed (NC) Contact
A1, A2, ..... A12 Normally Open (NO) Contact
a1, a2, ..... a12 Normally Closed (NC) Contact
C1, C2, ..... C16 Counter Coil/Normally Open (NO) Contact
c1, c2, ..... c16 Normally Closed (NC) Contact
Z1, Z2, ..... Z4 Normally Open (NO) Contact
z1, z2, ..... z4 Normally Closed (NC) Contact
X1, X2, ..... X16 Used for viewing Alarms, HMI Functionality
1, 2, ..... 16 Normally Open (NO) Contact
1, 2, ..... 16 Normally Closed (NC) Contact
P1, P2, ..... P16 Normally Open (NO) Contact
p1, p2, ..... p16 Normally Closed (NC) Contact
M1, M2, ..... M64 Auxiliary Coil/Normally Open (NO) Contact
m1, m2, ..... m64 Normally Closed (NC) Contact
Trigger Input
Timer Mode
Reset Input
Preset Time Unit
Current Time Unit
Timer Number
Make/Break Status of ‘NO’
Locked/Unlocked State
Preset Time Unit
Current Time Unit
TRG
RES
000.0
006.0
D
S
S
T1
X
OF
OF
From To
Current Time
Start Time
End Time
Time Switch No
Make/Break Status
of ‘NO’ Contact
Locked/Unlocked State
ON
OFF X
MO SU
08 : 11
09 : 15
12 : 00
1
Preset Value
Direction Input
Counter Unit
Reset Unit
Current Value
Retentive Selection (Y/N)
Locked/Unlocked State
Make/Break Status
of ‘NO’ Contact
00000
RET
C1 N
X
00004
DIR
CNT
RES
Counter Number
Compare Input
Compare Function
Absolute Value
Analog Comparator No
Locked/Unlocked State
C1
ABS P1
X
COMPARE
00000
>
01023
Make/Break Status of ‘NO’ Contact
Compare Input
Compare Function
Absolute Value
Analog Comparator No
Locked/Unlocked State
V1
ABS P1
X
ANALOG
0000
>
1023
Make/Break Status of ‘NO’ Contact
