YOKOGAWA F3CU04-0S User Manual

B2-7
IM 34M06H62-02E 2nd Edition : June 2008-00
B2.2.4 SP Backup Parameters
Use these parameters to back up SP values to the EEPROM.
Table B2.7 SP Value Backup Operation Parameter
Data Position Number
Symbol Description Unit
Data Range
Default
Value
Attribute Stored
See
Also
Loop1 Loop2 Loop3 Loop4
74
SPWR
Write set point to
EEPROM
None
0: Write not started or completed
“WR”: Write to EEPROM
0 RW
—
B2.4
B2.2.5 Function Control Parameters
Use these parameters to define the operation of module functions on a module-wide
basis.
Table B2.8 Function Control Parameters
Data Position Number
Symbol Description Unit Data Range
Default
Value
Attribute Stored
See
Also
Loop 1 Loop 2 Loop 3 Loop 4
75 NBKUP
Disable backup
function
None
0: Enable backup to EEPROM
1: Disable backup to EEPROM
0 RW — C9
B2.2.6 EEPROM Write Counter
The EEPROM Write Counter counts the number of write-to-EEPROM executions. Once
the value of the EEPROM write counter reaches its maximum limit, subsequent
write-to-EEPROM executions are no longer counted, although they can still be executed
until the EPPROM actually fails.
Table B2.9 SP Value Backup Operation Parameter
Data Position Number
Symbol Description Unit
Data Range
Default
Value
A
ttribut
e
Stored See Als
o
Loop1 Loop2 Loop3 Loop4
77 and 78 (long word)） EEP.CNTR
EEPROM Write
Counter
Times 1 to 100,000 — RO — —
You should disable the backup function if you expect parameters that are designated to
be automatically stored to be frequently updated. By default, the module automatically
stores the values of such parameters to the EEPROM each time they are updated. If
parameter values are frequently updated and the number of write executions exceeds
the maximum limit of 100,000, EEPROM may fail and subsequent storing is not
guaranteed. Therefore, in situations where stored parameters are frequently updated,
you should always disable the backup function using the NBKUP parameter.
The EEPROM write counter counts the number of write-to-EEPROM executions, but not
the number of write executions to individual data position numbers.
CAUTION

YOKOGAWA F3CU04-0S Specifications

General

Brand	YOKOGAWA
Model	F3CU04-0S
Category	Control Unit
Language	English