Automationdirect.com DirectLOGIC DL205 Series, User Manual

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DL205 User Manual, 4th Edition, Rev. B
5–217
Chapter 5: Standard RLL Instructions - ASCII
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ASCII Find (AFIND)
The ASCII Find instruction locates a specific ASCII string or portion of an ASCII string
within a range of V-memory registers and places the string’s Found Index number (byte
number where desired string is found), in Hex, into a specified V-memory register. Other
features include, Search Starting Index number for skipping over unnecessary bytes before
beginning the FIND operation, Forward or Reverse direction search, and From Begining and
From End selections to reference the Found Index Value.
• Base Address : specifies the begining V-memory register where the entire ASCII string is stored in
memory
• Total Number of Bytes : specifies the total number of bytes to search for the desired ASCII string
• Search Starting Index : specifies which byte to skip to (with respect to the Base Address) before
begining the search
• Direction : Forward begins the search from lower numbered V-memory registers to higher
numbered V-memory registers. Reverse does the search from higher numbered V–memory registers
to lower numbered V-memory registers.
• Found Index Value : specifies whether the Begining or the End byte of the ASCII string found will
be loaded into the Found Index register
• Found Index : specifies the V–memory register where the Found Index Value will be stored. A value
of FFFF will result if the desired string is not located in the memory registers specified. A value of
EEEE will result if there is a conflict in the AFIND search parameters specified.
• Search for String : up to 128 characters.
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2 5 0 -1
2 6 0
Parameter DL260 Range
Base Address All V-memory (See page 3 - 56)
Total Number of Bytes
All V-memory (See page 3 - 56)
or K1-128
Search Starting Index
All V-memory (See page 3 - 56)
or K0-127
Found Index All V-memory (See page 3 - 56)
Discrete Bit Flags Description
SP53 On if the CPU cannot execute the instruction.
SP71 On when a value used by the instruction is invalid.
DS Used
HPP N/A