Omron SYSMAC CJ - REFERENCE MANUAL 08-2008 Reference Manual page 1388

CJ-series Instruction Execution Times and Number of Steps
4-2-36 Guidelines on Converting Program Capacities from Previous
OMRON PLCs
1348
Contents
m Call part
n I/O parameter
transfer part
The data type is
shown in parenthe-
ses.
p Number of instruc-
tion steps in func-
tion block definition
Example:
Input variables with a 1-word data type (INT): 5
Output variables with a 1-word data type (INT): 5
Function block definition section: 100 steps
Number of steps for 1 instance = 57 + (5 + 5)
= 244 steps
Guidelines are provided in the following table for converting the program
capacity (unit: words) of previous OMRON PLCs (SYSMAC C200HX/HG/HE,
CVM1, or CV-series PLCs) to the program capacity (unit: steps) of the CJ-
series PLCs.
Add the following value (n) to the program capacity (unit: words) of the previ-
ous PLCs for each instruction to obtain the program capacity (unit: steps) of
the CJ-series PLCs.
CJ-series steps = "a" (words) of previous PLC + n
Instructions Variations
Basic None
instructions
Upward Differentiation
Immediate Refreshing
Upward Differentiation and
Immediate Refreshing
Special None
instructions
Upward Differentiation
Immediate Refreshing
Upward Differentiation and
Immediate Refreshing
For example, if OUT is used with an address of CIO 000000 to CIO 25515, the
program capacity of the previous PLC would be 2 words per instruction and
that of the CJ-series PLC would be 1 (2 – 1) step per instruction.
1-bit I/O variable (BOOL)
1-word I/O variable (INT,
UINT, WORD)
2-word I/O variable (DINT,
UDINT, DWORD, REAL)
4-word I/O variable (LINT,
ULINT, LWORD, LREAL)
The total number of instruction steps (same as standard
user program) + 27 steps.
6 steps + 100 steps + 27 steps
Value of n when
converting from
C200HX/HG/HE to
CJ Series
OUT, SET, RSET,
or KEEP(011): –1
Other instructions:
0
None
None
None
0
+1
None
None
Section 4-2
CS/CJ-series CPU Units
with unit version 3.0 or later
57 steps
6 steps
6 steps
6 steps
12 steps
Value of n when
converting from
CV-series PLC or
CVM1 to CJ Series
0
+1
0
+2
–1
0
+3
+4