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FX2N-5A Special function block Buffer Memory (BFM) 7
7-40
7.2.26 BFM 55 Analog output Gain data (READ/WRITE)
Output Gain data: Analog output voltage or current if digital input in BFM 14 is 16000 (or 1000
as stated in table below) default gain value for voltage mode (-10V/+10V) is 5V (=K5000), for
current mode (4 - 20mA) is 12mA(=K12000) and for current mode (0 - 20mA) is 10mA
(=K10000).
The value of BFM 55 is stored non-volatile in the internal EEPROM. There is a safety function
to protect the internal EEPROM from being destroyed by accidentally writing the same value
continuously to BFM 55.
Note: This table is not applicable for modes 9 to A (see Scaling function settings).
* In absolute voltage output mode, the theoretical value is 16000, however in reality it is not
possible to exceed 10V output voltage (BFM14=10000).
Table 7.10: Initial offset/gain value(Unit: mV for voltage output,
µ
A for current output)
BFM 14 value
for gain output
16000 1000 16000 500 16000 500 (16000*) 16000 16000
Output mode
(BFM 1)
0
(-10V to
+10V)
1
(-10V to
+10V)
2
(4 to
20mA)
3
(4 to
20mA
4
(0 to
20mA)
5
(0 to
20mA)
6
absolute
voltage
mode
7
absolute
current
mode
8
absolute
current
mode
Initial offset
value
0 0 4000 4000 0 0 0 fixed 0 fixed 0 fixed
Initial gain
value
5000
unit:mV
5000
unit:mV
12000
unit:
µ
A
12000
unit:
µ
A
10000
unit:
µ
A
10000
unit:
µ
A
16000
fixed
unit:mV
16000
fixed
unit:
µ
A
16000
fixed
unit:
µ
A