(4) Status information BFM #29
(5) Identification code BFM #30
The identification (or ID) code number for a Special Function Block is read using the FROM command.
The code for the FX-4AD unit is K2010.
The user's program in the PC can use this facility in the program to identify the special function block
before commencing data transfer from and to the special function block.
CAUTION
●
Values of BFM #0, #23 and #24 are copied to EEPROM memory of the FX-4AD. BFM #21 and
BFM #22 are only copied when data is written to the gain/offset command buffer BFM #22. Also,
BFM #20 causes writing to the EEPROM memory. The EEPROM has a life of about 10,000 cycles
(changes), so do not use programs which frequently change these BFMs.
●
Because of the time needed to write to the EEPROM memory, a delay of 300 ms is required
between instructions that cause a write to the EEPROM.
Therefore, a delay timer should be used before writing to the EEPROM a second time.
NOTE : • b4 to b7,b9 and b13 to b15 are undefined.
Bit
ON
OFF
b 0:Error
When any of b1 to b4 is ON.
If any of b2 to b4 is ON,A/D conversion
of all the channels is stopped
No error
b 1:Offset/Gain error
Offset/Gain data in EEPROM is corrupted
or adjustment error.
Offset/Gain data normal
b 2:Power source abnormality
DC 24V power supply failure
Power supply normal
b 3:Hardware error
A/D converter or other hardware failure
Hardware normal
b 8:Not READY
FX-4AD MODE switch is not set to READY
READY mode
b10:Digital range error
Digital output value is less than -2048
or more than +2047
Digital output value is normal
b11:Averaging error
Number of averaging samples is 4097 or
more or 0 or less
(default of 8 will be used)
Averaging is normal (between 1 and 4096)
b12:
Offset/Gain adjust prohibit
Prohibit-(b1,b0) of BFM #21 is set to (1,0)
Permit-(b1,b0) of BFM #21 is set to (0,1)
