Offset data
BFM
W
#8(E) Offset/gain setting command CH1, CH2 Initial value H0000
#9(E) Offset/gain setting command CH3, CH4 Initial value H0000
#10 Offset data CH1 *1
Unit:mV or A
#11 Gain data CH1 *2
#12 Offset data CH2 *1
In addition to the above functions, the buffer memories can adjust the I/O characteristics of the FX-4DA, and
report the status of the FX-4DA to the programmable controller.
Switching the output mode resets the I/O characteristics to the factory-set characteristics. Refer to the
performance specifications described in section 4.
Example: H2110 CH1: Voltage output (-10 V to +10 V)
CH2 and CH3: Current output (+4 mA to +20 mA)
CH4: Current output (0 mA to +20 mA)
­ [BFM #1, #2, #3 and #4]: Output data channels CH1, CH2, CH3, and CH4
BFM #1: Output data of CH1 (Initial value: 0) BFM #2: Output data of CH2 (Initial value: 0)
BFM #3: Output data of CH3 (Initial value: 0) BFM #4: Output data of CH4 (Initial value: 0)
® [BFM #5]: Data holding mode: While the programmable controller is in the STOP mode, the last output value
in the RUN mode will be held. To reset the value to the offset value, write the hexadecimal value in BFM #5
as follows:
m = 0:Sets the voltage output mode (-10 V to +10 V).
m = 1:Sets the current output mode (+4 mA to 20 mA).
m = 2:Sets the current output mode (0 mA to +20 mA). CH4 CH3 CH2 CH1
m = 0: Holds the output.
m = 1: Resets to the offset value.
CH4 CH3 CH2 CH1
Example: H0011•••••CH1 and CH2 = Offset value CH3 and CH4 = Output holding
Buffer memories marked "W" can be written to
using the TO instruction in the MPU.
The status of BFM #0, #5, and #21, (marked E)
will be written to EEPROM, therefore the set
values will be retained even after turning off the
power.
Actual analog output value
when corresponding output
*1:
respectively represent the following items:
µ
: