Owner's manual

ASCII I/O Module Tutorial
Chapter 4
418
Table 3.K
Display
of Converted Data
Line Conversion Display Notes
1
2
3
4
5
2 ASCII/word
1 ASCII/word
4 Hex/word
4 BCD/word
3 BCD/word
1 2 3 4 A B C D + M 0
2 4 B D + 0
3132 3334 4142 4344 20AB CDEF
3132 3334 4142 4344 20AB CDEF
132 334 142 344 0AB DEF
1
1 2
3
1  2 ASCII/word conversion examines the 7 bit code in each byte: AB=1010101 1=+;
CD=11001
101=M; EF=1 110111 1=o (Note that lower case letters are displayed as upper case
letters.)
2  Bits 1017 are not used in 1 ASCII/word conversion
3  Bits 1417 are not used in 3 BCD/word conversion
Verify the conversions (Table 3.K) as follows:
1. Load the file of the file-to-file move instruction (rung 15) starting at
position 001 exactly as shown in Table 3.J. Use procedure P3 and P5
from “Writing Data to Your ASCII Device”, P. 1-14.
Procedure P3 Set your industrial terminal to PLC2 mode
Procedure P5 Load data into the filetofile move instruction
2. Set initialization word one to data mode, and select three
initialization words. Set IW1=0002. Use the procedure in section
titled “Setting Bits in Initialization Words”, P. 3-4.
3. Change your data conversion to 2 ASCII characters per word and set
the string length to 12, (IW2=0012).
4. Remove the BCD delimiter from initialization word four. Set
IW4=0000.
5. Change operation of your industrial terminal to alphanumeric mode.
Transfer data to the industrial terminal by changing the processor
mode select switch to the RUN/PROG position.
Results The industrial terminal displays
1234ABCD+M0(table 4.K, line1)
6. Verify the remaining conversions in lines 2, 3, 4 and 5 (Table 3.K) by
setting IW2(16-14) as follows: