α
2 Simple Application Controllers
Function Blocks 6
6 - 6
6.1
Definitions
DirectSet - Enter a value using the “+” and “-” keys.
Analog In - An analog input value from a System Input (A01, A02, A03,... A08).
FB Value - A value contained in a Function Block (T, t, N, n, Direct set, etc.)
Word Comparison - a 16 bit output value from a Function Block.
6.2
Abbreviations
Table 6.2: Abbreviated terms used in describing function block
Note: The following function block information, details specific explanation concerning
front panel programming using the
α
2
Series Controller. However, it is assumed the
user has read and understood Direct Programming Chapter 4. Thus, is capable of
connecting function blocks together using the dedicated front panel keys. Hence, each
function block provides step by step instructions for direct input having ignored the
initial key presses detailed in Chapter 4.
Term
Description
I
Input pin for function block operation
1,2,3,4
Numbered Input pins for boolean logic type function blocks
O
Output pin for function block operation
S
Set pin for the function block
R
Reset pin for the function block
C
Clear pin for the function block
U
Increments a positive count to the Up/Down Counter Function Block
D
Increments a negative count to the Up/Down Counter Function Block
P
Preset signal input pin for the Up/Down Function Block
N
The count value set by the user, range: 0 - 32767
n
Th e a c t u a l c o un t va l u e. Th i s va l u e c an b e s e t t o a o n e tim e o ff s e t va l u e,
range: 0 - 32767
T
For Shift function block only.
Shift input pin
T
User specified Set Time Value, range: 0 - 3276.7sec
t
The elapsed time since the function set ON, range: 0 - 32767sec
