Omron SYSMAC CS Series Instruction & Reference Manual page 356

3. Instructions
 Operand Specifications
Word addresses
Area
CIO WR HR
S
DI OK OK OK
D
Flags
Name
Error Flag
Function
HEX(162) treats the contents of the source
word(s) as ASCII data representing
hexadecimal digits (0 to 9 and A to F), converts
the specified number of bytes to hexadecimal,
and writes the hexadecimal data to the
destination word beginning at the specified digit.
When converting data, the leftmost bit of the
ASCII code data can be treated as an odd or
even parity bit according to the parity
specification.
Hint
• The parity bit is appended to the data to enable detection of errors when the data is transmitted. By
adding this bit, the number of bits that are 1 in the data can be indicated as odd or even, and if the
number of 1s in the received data is not similarly odd or even, it is assumed that an error has
occurred.
• With CS1-H CPU Units, CJ1-H CPU Units, CJ1M CPU Units, CS1D CPU Units with unit version 4.0
or later and CJ2 CPU Units, there are instructions to convert ASCII to 4, 8, and 16 digits of numeric
data (NUM4(517), NUM8(520), and NUM16(522)).
Precaution
• When multiple digits are specified in the number of digits to be converted (C), the digits are converted
in order from the starting conversion position (C) of S going to the left word side, and the conversion
results are stored in order from the output starting bit (C) of D going to the left (returns to digit 0 after
digit 3).
• Among the data in the conversion result output word, data of bits that are not to be output are held
(kept the same as before).
• The following table shows ASCII data which can be contained in the source word(s) (excluding parity
bits) and corresponding hexadecimal digits.
ASCII data (2 hexadecimal digits)
30 to 39
41 to 46
322
Indirect DM/EM
@DM
AR T C DM EM
@EM
OK OK OK OK OK OK
Label
ER • ON if there is a parity error in the ASCII data.
• ON if the ASCII data in the source words is not equivalent to hexadecimal digits
• ON if the content of Di is not within the specified ranges.
• OFF in all other cases.
Hexadecimal digits
0 to 9
A to F
Registers
addresses
Con-
stants
*DM
DR
*EM
--- ---
OK OK OK
--- ---
Operation
First byte to convert
Left (1)
Number of digits (n+1)
CS/CJ/NSJ Series Instructions Reference Manual (W474)
Flags
Pulse
bits
Indirect
IR TK CF
using IR
--- OK --- --- ---
Di
Right (0)
First digit to write
TR
bits
---