This manual confers no indus
nor does it confer any patent
held responsible for any probl
occur as a result of using the
Warranty
Mitsubishi will not be held liab
the cause of Mitsubishi; oppor
Mitsubishi products; damage,
caused by special factors unp
other than Mitsubishi products
This product has been man
industries, and has not bee
a device or system used in
Before using the product fo
power, aerospace, medicin
Mitsubishi Electric.
This product has been man
when installing the product
product fails, install approp
•
•
•
This manual confers no indus
nor does it confer any patent
held responsible for any probl
occur as a result of using the
Warranty
Mitsubishi will not be held liab
the cause of Mitsubishi; oppor
Mitsubishi products; damage,
caused by special factors unp
other than Mitsubishi products
This product has been man
industries, and has not bee
a device or system used in
Before using the product fo
power, aerospace, medicin
Mitsubishi Electric.
This product has been man
when installing the product
product fails, install approp
•
•
•
7.2 Adjustment of I/O characteristics
Adjust the I/O characteristics using the buffer memories in the FX2NC-4AD.
Firstly, enter the input mode to BFM #0, then enter the offset data to BFM #41 to
BFM #44, subsequently enter the gain data to BFM #51 to BFM #54.
Update the offset data and the gain data for each channel using BFM #21.
Example program (Adjustment of CH1, CH2 and CH4)
*1 It takes approximately 5 seconds to change the input mode (BFM #0) (to
change each set value).
Assure that a time interval of 5 seconds or more is held after a change of the
input mode until execution of write of each setting (TO instruction).
• The I/O characteristics can be written (BFM #21) to either channel, or two or
more channels simultaneously.
20mA
-16000
0
Approx.
-20.4mA
-16320
20mA
-4000
0
-4080
Approx.
-20.4mA
Digital value
-20mA
20mA
20000
-20000
Input
current
0
20400
-20400
Approx.
20.4mA
Approx.
-20.4mA
8. Current input, -20 to 20 mA,
-20,000 to 20,000 (Direct mode)
X000
K0 K0 H1600 K1
K0 K41 K0 K2
K0 K51 K1250 K2
K0 K44 K0 K1
K0 K54 K10000 K1
K0 K21 H000F K1
Operation
start
instruction
Specifies the input
mode of CH1 to CH4.
Offset value of CH1
and CH2.
Gain value of CH1 and
CH2.
Offset value of CH4.
Gain value of CH4.
Offset value and gain
value of all channels at
a time.
M0
M0
SET
TO K50
*1
T0
RST M0
FNC 79
TO P
FNC 79
TO P
FNC 79
TO P
FNC 79
TO P
FNC 79
TO P
FNC 79
TO P
M8002
K0 K0 H3300 K1
K0 K22 H0002 K1
K0 K10 D0 K4
K0 K26 K2M0 K1
Specifies the input
mode of CH1 to
CH4.
Enables the upper/
lower limit value
detection function.
Reads the channel data
from CH1 to CH4.
(CH1 → D0, CH2 →
D1,
.....
CH4 → D3)
Reads the upper/lower
limit value error status.
(M0 to M7)
FNC 79
TO
FNC 79
TO
FNC 78
FROM
FNC 78
FROM
K0 K28 K2M20 K1
K0 K29 D6 K1
FNC 78
FROM
FNC 78
FROM
K0 K99 H0003 K1
K0 K28 K0 K1 P
FNC 79
TO
X001
Clear of
upper/lower
limit value
error
X002
Clear of scale over error
RUN monitor
Reads the scale over
status.(M20 to M27)
Reads the error status.
(BFM #29 → D6)
Clears the upper/lower
limit value error.
Clears the scale over
error.
P
FNC 79
TO
TO K50
M8000
T0
Initial pulse
P
Stand by for five
seconds.
1)
• • •
Y0
M0
Lower limit value error of CH1
Y1
M1
Upper limit value error of CH1
Y7
M7
Upper limit value error of CH4
Y20
M20
Scale over error of CH1 (lower limit value)
Y21
M21
Scale over error of CH1 (upper limit value)
Y27
M27
Scale over error of CH4 (upper limit value)
Outputs the upper/
lower limit value error
status of each
channel.
Outputs the scale over
error status of each
channel.
• • •
*1 When multiple data histo
becomes longer.
In the FX2NC Series PLC,
error indicator lamp lights
When reading many data
read using two or more F
dog timer refresh) instructi