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FX Series Programmable Controlers Applied Instructions 5
5-80
5.8 External FX I/O Devices - Functions 70 to 79
Contents:
Pa
g
e
TKY - Ten Ke
y
Input FNC 70 5-81
HKY - Hexadecimal Input FNC 71 5-82
DSW - Di
g
ital Switch
(Thumbwheel input) FNC 72 5-83
SEGD - Seven Se
g
ment Decoder FNC 73 5-84
SEGL - Seven Se
g
ment
With Latch FNC 74 5-85
ARWS - Arrow Switch FNC 75 5-87
ASC - ASCII Code FNC 76 5-88
PR- ‘Print’ To A Displa
y
FNC 77 5-89
FROM - Read From A Special
Function Block FNC 78 5-90
TO - Write To A Special
Function Block FNC 79 5-91
Symbols list:
D - Destination device.
S - Source device.
m, n- Number of active devices, bits or an operational constant.
Additional numeric suffixes will be attached if there are more than one operand with the same
function e.
g
. D
1
, S
3
or for lists/tabled devices D
3+0,
S
+9
etc.
MSB - Most Si
g
nificant Bit, sometimes used to indicate the mathematical si
g
n of a number, i.e.
positive = 0, and ne
g
ative = 1.
LSB - Least Si
g
nificant Bit.
Instruction modifications:
-
An instruction operatin
g
in 16 bit mode, where identifies the instruction
mnemonic.
P - A 16 bit mode instruction modified to use pulse (sin
g
le) operation.
D
- An instruction modified to operate in 32 bit operation.
D P - A 32 bit mode instruction modified to use pulse (sin
g
le) operation.
- A repetitive instruction which will chan
g
e the destination value on ever
y
scan unless
modified b
y
the pulse function.
- An operand which cannot be indexed, i.e. The addition of V or Z is either invalid or will
have no effect to the value of the operand.