FX Series Programmable Controlers Applied Instructions 5
5-100
5.8 External FX I/O Devices - Functions 70 to 79
Contents:
Page
TKY - Ten Key Input FNC 70 5-81
HKY - Hexadecimal Input FNC 71 5-82
DSW - Digital Switch
(Thumbwheel input) FNC 72 5-83
SEGD - Seven Segment Decoder FNC 73 5-84
SEGL - Seven Segment
With Latch FNC 74 5-85
ARWS - Arrow Switch FNC 75 5-87
ASC - ASCII Code FNC 76 5-88
PR- ‘Print’ To A Display 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,S3 or for lists/tabled devices D3+0, S+9 etc.
MSB - Most Significant Bit, sometimes used to indicate the mathematical sign of a number, i.e.
positive = 0, and negative = 1.
LSB - Least Significant Bit.
Instruction modifications:
PPP - An instruction operating in 16 bit mode, where PPP identifies the instruction
mnemonic.
PPPP - A 16 bit mode instruction modified to use pulse (single) operation.
DPPP - An instruction modified to operate in 32 bit operation.
DPPPP - A 32 bit mode instruction modified to use pulse (single) operation.
( - A repetitive instruction which will change the destination value on every scan unless
modified by 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.
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