Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 271)

Introduction to Programming
Chapter 10
10-3
Tape with Program End = % (ASCII), ER (EIA)
Unlike the previous tape type mentioned, this type of tape accepts only the
“%” (ER) field as the program end code. See Figure 10.2. See chapter 10
for details on legal program end codes and the effect of STOP PRG END.
Figure 10.2
Tape Configuration (Program End = % (ASCII), ER (EIA))
ER
or
%
E
O
B
Program start code
Leader
section
Tape start
code
Part program
Program
end code
Tape end
code
1 foot
space
O100
Program
name
(opt)
O101
Program
name (opt)
Program
end code
Part program
%
Comment
(opt)
E
O
B
Comment
(opt)
Program start code
ER
or
%
or
ER
%
or
ER
Typical single program tape
Typical multi-program tape
This tape format conforms to the variable block length format specified by
EIA standard RS-274D.
The control automatically recognizes EIA or ASCII during input when it
reads the first EOB code from the tape.
(1) Tape Start (Rewind, Stop Code)
The tape start code, indicating the beginning of a tape, is designated with:
% character ---- ASCII format
ER ---- EIA format
This code must be on the tape if you program a tape rewind code (M30,
M99) in the part program. In other cases (M02, %), it is not necessary to
have this code on the tape. Any tape punched from the 9/Series control
has the tape start code.