Rockwell Automation 1775-S5_SR5,D17756.5.5 User Manual PLC-3 FAMILY I/0 - Manual (Page 116)

Diagnostics Methods
Chapter 7
7-4
Figure 7.1
Error Block Operation
MAIN
SUB 1
SUB 2
Line Number Procedure Word
150
28
5
Error Block
124
1
1
150
28
5
11247
0
1
2
3
4
5
@SUB 1
@SUB 2
6:12 = COUNT
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Contents (decimal)
ON_ERROR or IF commands can contain an embedded command to
execute another procedure. In these cases, the scanner treats the embedded
execute command just like a nesting level (Figure 7.2).