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(4) Status information BFM #29
Bit
b 0:Error
b 1:Offset/Gain error
b 2:Power source abnormality
b 3:Hardware error
b 8:Not READY
FX-4AD MODE switch is not set to READY
b10:Digital range error
b11:Averaging error
b12:
Offset/Gain adjust prohibit
NOTE : • b4 to b7,b9 and b13 to b15 are undefined.
(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.
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ON
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
Offset/Gain data in EEPROM is corrupted
or adjustment error.
DC 24V power supply failure
A/D converter or other hardware failure
Digital output value is less than -2048
or more than +2047
Number of averaging samples is 4097 or
more or 0 or less
(default of 8 will be used)
Prohibit-(b1,b0) of BFM #21 is set to (1,0)
OFF
No error
Offset/Gain data normal
Power supply normal
Hardware normal
READY mode
Digital output value is normal
Averaging is normal (between 1 and 4096)
Permit-(b1,b0) of BFM #21 is set to (0,1)
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