FX
0N
-3A SPECIAL FUNCTION BLOCK
USER’S GUIDE
JY992D49001F
This manual contains text, diagrams and explanations which will guide the user in the correct installation
and operation of the FX
0N
-3A special function block and should be read and understood before attempting
to install or use the unit. Further information can be found in the FX PROGRAMMING MANUAL(
ΙΙ
), FX
0N
/FX
1N
/FX
2N
/FX
2NC
SERIES HARDWARE MANUAL.
1. Introduction
•
The FX
0N
-3A analog special function block has two input channels and one output channel.
The input channels receive analog signals and convert them into digital values.
The output channel takes a digital value and outputs an equivalent analog signal.
The FX
0N
-3A has a maximum resolution of 8 bits.
•
The selection of voltage or current based input/output is decided by user wiring.
•
An FX
0N
-3A can connected to the FX
2N
, FX
2NC
, FX
1N
or FX
0N
series of Programmable Controllers
(Hereafter referred to as a PLC).
•
All data transfers and parameter setups are adjusted through software control for the FX
0N
-3A, via
TO/FROM applied instructions in the PLC. Communications between the PLC and FX
0N
-3A are
protected by a photo-coupler.
•
An FX
0N
-3A occupies 8 I/O points on the PLC’s expansion bus. The 8 I/O points can be allocated from
either inputs or outputs.
1.1 External Dimensions
2. Terminal layouts and wiring
•
When a current input is used, ensure that the terminals marked [VIN*1] and [IIN*1] are linked.
Do not connect the [VOUT] and [IOUT] terminals when the current output is used.
*1 terminal number 1 or 2 is identified here.
•
If any voltage ripple is experienced on the voltage inputs/outputs or if there is excessive electrical
noise, connect a capacitor of 0.1 to 0.47
μ
F, approx
.
25V rating at position *2.
P O W E R
D / A
G A I N
A / D
O F F S E T
A / D
G A I N
D / A
O F F S E T
P O W E R
V
IN
2
C
O
M
2
C
O
M
1
I
IN
1 I
IN
2
V
IN
1
V
IN
2
C
O
M
C
O
M
IIN
1 IIN
2
V
IN
1
C
O
M
V
O
U
T
I
O
U
T
C
O
M
V
O
U
T
IO
U
T
3 5 m m
D I N r a i l
g r o o v e
9 ( 0 . 3 5 )
8 7 ( 3 . 4 3 )
M o u n t i n g h o l e ,
2 h o l e s 4 . 5
( 0 . 1 8 ) d i a
4 3 ( 1 . 6 9 )
4 ( 0 . 1 6 )
80
(3
.1
5)
90
(3
.5
4)
M 3 ( 0 . 1 2 )
t e r m i n a l s c r e w s
E x t e n s i o n
c a b l e
Mass: Approx. 0.2kg (0.44lbs)
Dimensions: mm (inches)
V
IN
2
C
O
M
2
C
O
M
1
I
IN
1 I
IN
2
V
IN
1
V
IN
2
C
O
M
2
C
O
M
1
I
IN
1 I
IN
2
V
IN
1
C
O
M
V
O
U
T
I
O
U
T
C
O
M
V
O
U
T
I
O
U
T
+
+
+
+
+
+
C H 1
C H 2
C H 1
C H 2
* 2
* 2
C u r r e n t
i n p u t
V o l t a g e
i n p u t
V o l t a g e
o u t p u t
C u r r e n t
o u t p u t
3. Connection with PLC
1) Up to 4 FX
0N
-3A units can connect to the FX
0N
series PLC, up to 5 for FX
1N,
up to 8 for FX
2N
or, up to
4 for an FX
2NC
series PLC, all with powered extension units.
However the following limitation exists when the undermentioned special function blocks are con-
nected.
FX
2N
:
Main unit and powered extension units of 32 I/O points or less. Consumption current available for
undermentioned special function blocks
≤
190mA
FX
2N
:
Main unit and powered extension units of 48 I/O points or more. Consumption current available
for undermentioned special function blocks
≤
300mA
FX
2NC
: Up to 4 undermentioned special function blocks can be connected regardless of the system I/O.
FX
0N/1N
: Main unit and powered extension units. Up to 2 undermentioned special function blocks can be
connected regardless of the system I/O.
The consumption current of the above units is to be subtracted from the service power supply of the host
PLC.
2) FX
0N
-3A consumes 5V DC by 30mA. The total 5V consumption of all special function blocks
connected to either the FX
2N
or
FX
2NC
main unit or an FX
2N
extension unit must not exceed the 5V
voltage source capacity of the system.
3) The FX
0N
-3A and main unit are connected by a cable on the right of the main unit.
4. Installation notes and Usage
4.1 General and Environmental Specifications
4.2 Performance Specifications
FX
2N
-2AD
FX
2N
-2DA
FX
0N
-3A
Consumption current of 24V DC for one unit.
50mA
85mA
90mA
Item
Specification
General specifications
(ex. withstand voltage)
Same as those for the main unit
Withstand Voltage
500V AC for 1 minute (between ground and all other terminals)
Analog circuit power requirement
24V DC +/- 10%, 90mA (internal power supply from main unit)
Digital circuit power requirement
5V DC, 30mA (internal power supply from main unit)
Isolation
Photo-coupler isolation between analog and digital circuit.
No isolation between analog channels.
Number of occupied I/O points
8 I/O points from expansion bus. (either input or output)
Voltage input
Current input
Analog input range
At shipment, 0 to 250 range selected for 0 to 10V DC input.
When using an FX
0N
-3A for current input or differing voltage inputs except 0 to
10V DC, it is necessary to readjust the offset and gain.
The module does not allow different input characteristics for two channels.
0 to 10V, 0 to 5V DC, resistance
200k
Ω
. Warning: this unit may be
damaged by input voltages in excess
of -0.5V, +15V.
4 to 20mA, resistance 250
Ω
. Warning:
this unit may be damaged by input
currents in excess of -2mA, +60mA.
Digital resolution
8 bits
Smallest input sig-
nal resolution
40mV: 0 to 10V/0 to 250(At shipment)
Change depending on the input
characteristic.
64
μ
A: 4 to 20mA /0 to 250
Change depending on the input
characteristic.
Overall accuracy
± 0.1V
± 0.16mA
Processing time
TO instruction processing time x 2 + FROM instruction processing time
Input characteristics
The module does not allow different input characteristics for two channels.
2 5 0
2 5 5
2 0
20
.3
2
m
A
0
D
IG
IT
A
L
V
A
LU
E
A N A L O G I N P U T m A
4
1
4 . 0 6 4
2 5 0
2 5 5
1 0
10
.2
V
0
D
IG
IT
A
L
V
A
LU
E
A N A L O G I N P U T V O L T S
1
0 . 0 4 0
2 5 0
2 5 5
5
5.
1
V
0
D
IG
IT
A
L
V
A
LU
E
A N A L O G I N P U T V O L T S
1
0 . 0 2 0
[At shipment]
5. Allocation of Buffer Memories (BFM)
When FNC176(RD3A) and FNC177(WR3A) are used with FX
1N
,FX
2N
(V3.00 or more) or FX
2NC
(V3.00 or
more), the allocation of the buffer memory (BFM) need not be considered.
•
BFM 17:
b0 = 0 analog input channel 1 is selected
b0 = 1 analog input channel 2 is selected
b1 = 0
Ö
1, the A/D conversion process is started
b2 = 1
Ö
0, the D/A conversion process is started
•
Note: These buffer memory devices are stored/located within the FX
0N
-3A
6. Diagnostics
6.1 Preliminary Checks
a) Check whether the input/output wiring and/or expansion cables are properly connected.
b) Check that the system configuration rules for the host PLC have not been broken.
c)
Ensure that the correct operating range has been selected for the application.
d) As the status of the PLC changes (RUN
Ö
STOP, STOP
Ö
RUN, etc.), the analog output status will
operate in the following manner.
Status change of the host PLC:
-
RUN
Ö
STOP: The last operational value used by the analog output channel during RUN
operation is retained during STOP mode.
-
STOP
Ö
RUN: Once the host PLC is switched back into RUN mode the analog output reacts as
normal to the program controlled, digital values.
PLC power shutdown: The analog output signal ceases operation.
e) Remember that only 8 bit digital values (0 to 255) are valid for use with the analog output of the
FX
0N
-3A
Voltage output
Current output
Analog output range
At shipment, 0 to 250 range selected for 0 to 10V DC output.
When using an FX
0N
-3A for current output or differing voltage output except 0 to
10V DC, it is necessary to readjust the offset and gain.
DC 0 to 10V, 0 to 5V external load:
1k
Ω
to 1M
Ω
4 to 20mA, external load: 500
Ω
or less
Digital resolution
8 bits
Smallest output
signal resolution
40mV: 0 to 10V/0 to 250(At shipment)
Change depending on the input
characteristic.
64
μ
A: 4 to 20mA /0 to 250
Change depending on the input
characteristic.
Overall accuracy
± 0.1V
± 0.16mA
Processing time
TO instruction processing time x 3
Output
characteristics
If digital source data of greater than 8 bits is used, only the lower 8 bits will be
valid. Additional (upper) bits will be ignored
BFM
No.
b15-b8
b7
b6
b5
b4
b3
b2
b1
b0
0
Reserved
Current value input data (stored in 8 bits) of the A/D channel selected by b0 of BFM#17
16
Current value output data on D/A channel (stored in 8 bits)
17
Reserved
D/A
start
A/D
start
A/D
channel
1-5,
18-31
Reserved
2 5 0
25
5
2 0
2 0 . 3 2 m A
0
D I G I T A L V A L U E
A
N
A
LO
G
O
U
TP
U
T
m
A
4
1
4 . 0 6 4
2 5 0
25
5
1 0
1 0 . 2 V
0
D I G I T A L V A L U E
A
N
A
LO
G
O
U
TP
U
T
V
O
LT
S
0 . 0 4 0
1
2 5 0
25
5
5
5 . 1 V
0
D I G I T A L V A L U E
A
N
A
LO
G
O
U
TP
U
T
V
O
LT
S
0 . 0 2 0
1
[At shipment]
