Omron CX-PROGRAMMER V8.1 Operation Manual page 80

Programming Restrictions
Error-related
Restrictions
Prohibiting Access to
FB Instance Areas
Note
If a fatal error occurs in the CPU Unit while a function block definition is being
executed, ladder program execution will stop at the point where the error
occurred.
Program
Instance name
0.0
FB
EN ENO
D100 D200
AAA BBB
In this case, the MOV AAA BBB instruction will not be executed and output
variable D200 will retain the same value that it had before the function block
was executed.
To use a function block, the system requires memory areas to store the
instance's internal variables, input variables, output variables, and input-out-
put variables.
CJ2-series CPU Units
Function block instance
area
Non-retained
Retained
Timer
Counter
Force-setting/resetting is enabled when the following EM banks are specified:
CJ2H-CPU64(-EIP)/-CPU65(-EIP)
CJ2H-CPU66(-EIP)
CJ2H-CPU67(-EIP)
CJ2H-CPU68(-EIP)
CS/CJ-series CPU Units Ver. 3.0 or Later, and NSJ Controllers
Function block instance
area
Non-retained
Retained
Timer
Counter
FQM1 Flexible Motion Controllers
FB Instance
Area
Start address
Non Retain 5000
Retain None
Timers T206
Counters C206
FB definition
Body
LD P_On
10.0
++ AAA
Fatal error occurs here.
MOV AAA BBB
Initial value of Initial value
start address of size
H512 896
H1408 128
T3072 1024
C3072 1024
EM bank 3
EM banks 6 to 9
EM banks 7 to E
EM banks 11 to 18
Initial value of Initial value
start address of size
H512 896
H1408 128
T3072 1,024
C3072 1,024
Default value
End address Size
5999 1000
T255 50
C255 50
Section 2-4
Allowed data areas
CIO, WR, HR, DM,
EM (See note.)
HR, DM, EM (See
note.)
TIM
CNT
Allowed data areas
CIO, WR, HR, DM, EM
HR, DM, EM
TIM
CNT
Applicable memory
areas
CIO, WR, DM
TIM
CNT
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