Mitsubishi Electric FX2N-32ASI-M User manual

USER’S MANUAL
FX2N-32ASI-M AS-interface Master Block

FX2N-32ASI-M AS-interface Master Block
Foreword
•This manual contains text, diagrams and explanations which will guide the reader in the correct installation
and operation of the communication facilities of FX series.
•Before attempting to install or use the communication facilities of FX series this manual should be read and
understood.
•If in doubt at any stage of the installation of the communication facilities of FX series always consult a
professional electrical engineer who is qualified and trained to the local and national standards which apply to
the installation site.
•If in doubt about the operation or use of the communication facilities of FX series please consult the nearest
Mitsubisi Electric distributor.
•This manual is subject to change without notice.

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FX2N-32ASI-M AS-interface
Master Block
User’s Manual
This manual confers no industrial property rights or any rights of any other kind, nor does it confer any patent
licenses. Mitsubishi Electric Corporation cannot be held responsible for any problems involving industrial
property rights which may occur as a result of using the contents noted in this manual.
FX2N-32ASI-M AS-interface Master Block
Manual number : JY992D76901
Manual revision : F
Date : October 2006

FX2N-32ASI-M AS-interface Master Block
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FX2N-32ASI-M AS-interface Master Block
iii
Guidelines for the safety of the user and protection of the FX2N-32ASI-M
AS-interface Master Block.
This manual provides information for the use of the FX2N-32ASI-M AS-interface Master Block.
The manual has been written to be used by trained and competent personnel. The definition of
such a person or persons is as follows:
a) Any engineer who is responsible for the planning, design and construction of automatic
equipment using the product associated with this manual should be of a competent
nature, trained and qualified to the local and national standards required to fulfill that
role. These engineers should be fully aware of all aspects of safety with regards to
automated equipment.
b) Any commissioning or service engineer must be of a competent nature, trained and
qualified to the local and national standards required to fulfill that job. These engineers
should also be trained in the use and maintenance of the completed product. This
includes being completely familiar with all associated documentation for said product. All
maintenance should be carried out in accordance with established safety practices.
c) All operators of the completed equipment should be trained to use that product in a safe
and co-ordinated manner in compliance to established safety practices. The operators
should also be familiar with documentation which is connected with the actual operation
of the completed equipment.
Note : The term ‘completed equipment’ refers to a third party constructed device which
contains or uses the product associated with this manual.

FX2N-32ASI-M AS-interface Master Block
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Note’s on the symbols used in this manual
At various times through out this manual certain symbols will be used to highlight points of
information which are intended to ensure the users personal safety and protect the integrity of
equipment. Whenever any of the following symbols are encountered its associated note must
be read and understood. Each of the symbols used will now be listed with a brief description of
its meaning.
Hardware warnings
1) Indicates that the identified danger WILL cause physical and property damage.
2) Indicates that the identified danger could POSSIBLY cause physical and property
damage.
3) Indicates a point of further interest or further explanation.
Software warning
4) Indicates special care must be taken when using this element of software.
5) Indicates a special point which the user of the associate software element should
be aware.
6) Indicates a point of interest or further explanation.

FX2N-32ASI-M AS-interface Master Block
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• Under no circumstances will Mitsubishi Electric be liable responsible for any consequential
damage that may arise as a result of the installation or use of this equipment.
• All examples and diagrams shown in this manual are intended only as an aid to
understanding the text, not to guarantee operation. Mitsubishi Electric will accept no
responsibility for actual use of the product based on these illustrative examples.
• Owing to the very great variety in possible application of this equipment, you must satisfy
yourself as to its suitability for your specific application.

FX2N-32ASI-M AS-interface Master Block
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vii
Table of contents
Guideline .............................................................................................iii
Table of contents
1. Introduction............................................................................................1-1
1.1 External Dimensions and Each Part Name ......................................................... 1-2
1.2 System configuration ........................................................................................... 1-4
1.3 Applicable PLC .................................................................................................... 1-5
1.3.1 Controlled Maximum I/O Points of Each PLC............................................................ 1-5
1.3.2 Maximum Controlled Slave Units .............................................................................. 1-6
2. Wiring ....................................................................................................2-1
2.1 Caution for Wiring................................................................................................ 2-1
2.2 Wiring .................................................................................................................. 2-2
3. Specifications ........................................................................................3-1
3.1 Environmental Specifications .............................................................................. 3-1
3.2 Power Supply Specifications ............................................................................... 3-1
3.3 Performance Specifications................................................................................. 3-2
FX2N-32ASI-M AS-interface Master Block

FX2N-32ASI-M AS-interface Master Block
viii
4. Master Start-Up .....................................................................................4-1
4.1 Flow of Master Start-Up....................................................................................... 4-1
4.2 Off-line Phase...................................................................................................... 4-2
4.3 Detection Phase .................................................................................................. 4-2
4.4 Activation Phase.................................................................................................. 4-2
4.5 Start of Normal Operation.................................................................................... 4-3
5. Allocation of Buffer Memories (BFMs)...................................................5-1
5.1 Buffer Memories (BFM) List................................................................................. 5-1
5.2 Execution Control (EC) Flags and Host Interface (HI) Flags
<BFM #0 bit 0 to bit 3 and #8> ............................................................................ 5-3
5.2.1 Execution Control (EC) Flags (Using FROM Instruction)
<BFM #0 bit 0 to 3, BFM #8> .................................................................................... 5-4
5.2.2 Host Interface (HI) Flags (Using TO Instruction) <BFM #0 bit 0 to bit 3>.................. 5-7
5.3 Input and Output Data for AS-interface slave
<BFM #0 bit 4 to bit 15 and #1 to #7> (Read / Write).......................................... 5-8
5.4 Watchdog Time Setting <BFM #9> (Read / Write) .............................................. 5-9
5.5 List of Detected Slave (LDS) <BFM #10, #11> (Read only).............................. 5-10
5.6 List of Activated Slaves (LAS) <BFM #12, #13> (Read only)............................ 5-11
5.7 List of Projected Slaves (LPS) <BFM #14, #15> (Read / Write)........................ 5-12
5.8 List of Slaves with Configuration Differences <BFM #16, #17> (Read only)..... 5-13
5.9 Command Buffer <BFM #20 to 22> (Read / Write) ........................................... 5-14
5.9.1 Command Word List................................................................................................ 5-15
5.9.2 Result List................................................................................................................5-18
5.9.3 Example Program for Command Buffer .................................................................. 5-19

FX2N-32ASI-M AS-interface Master Block
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5.10 Error Status <BFM #29> (Read Only) ............................................................... 5-24
5.11 ID Code <BFM #30> (Read Only) .....................................................................5-25
6. Configuration Mode and Protected Operating Mode.............................6-1
6.1 Changing the Operation Mode ............................................................................ 6-2
6.1.1 Switching to Protected Operation Mode.................................................................... 6-2
6.1.2 Switching to Configuration Mode............................................................................... 6-2
6.2 Configuration Mode ............................................................................................. 6-3
6.2.1 Operating the Master in Configuration Mode ............................................................ 6-3
6.2.2 Programming the Slave Address............................................................................... 6-4
6.2.3 Delete Slave Address................................................................................................ 6-5
6.3 Protected Operating Mode .................................................................................. 6-6
6.3.1 Operating the Master in Protected Operating Mode.................................................. 6-6
6.3.2 Automatic Address Assignment ................................................................................ 6-7
6.3.3 Manual Address Assignment..................................................................................... 6-8
6.4 Displayed Message Number ............................................................................... 6-9
7. Example Program..................................................................................7-1
7.1 Content of Operation ........................................................................................... 7-1
7.2 System Configuration .......................................................................................... 7-2
7.3 Example Program................................................................................................ 7-3

FX2N-32ASI-M AS-interface Master Block
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8. Diagnostics............................................................................................8-1
8.1 Preliminary Checks.............................................................................................. 8-1
8.2 Error Checking..................................................................................................... 8-2
8.2.1 LED Check ................................................................................................................ 8-2
8.2.2 Check the display message for the 32ASI-M ............................................................ 8-5
8.2.3 Check BFM #29 error status of the 32ASI-M ............................................................ 8-7
Appendix A:
Further Information Manual Lists.............................................................. A-1

Introduction 1.
1-1
1. Introduction
The FX2N-32ASI-M (hereinafter referred to “32ASI-M”) is master block in AS-interface
(Actuator-Sensor-Interface) system for FX3U, FX2N, FX1N and FX0N series PLCs.
1) Automatic Address Assignment for AS-interface Slave Units
When a slave breaks down (one of the configured slaves is not recognized), 32ASI-M can
automatically allocate the slave at address 0 to the failed address.
If the non-functioning slave is replaced, the system will revert to the original slave address
numbering.
2) Control Slave Units
The 32ASI-M can control a maximum of 31 slave units (up to 4 inputs and 4 outputs per
address) on an AS-interface system. However, the maximum number of controllable slaves
may be limited according to programmable controller connected. (refer to subsection 1.3.2.)
3) The Maximum Total Extension Distance
The maximum total extension distance is usually 100m (328' 1"). Using 2 repeaters, the
maximum total extension distance is 300 m (984' 3").
4) I/O Refresh Time
I/O refresh time is about 5ms using maximum I/O points.
FX2N-32ASI-M AS-interface Master Block

FX2N-32ASI-M AS-interface Master Block Introduction 1.
1-2
1.1 External Dimensions and Each Part Name
Dimensions: mm (inches) MASS (Weight): 0.2 kg (0.44 lbs)
Accessory: Special block No. label
FX2N-32ASI-M
POWER
Remove Top Cover
U ASI
ASI ACTIVE
PRJ MODE
PRG ENABLE
FROM TO
CONFIG ERR
MODE SET
FX2N-32ASI-M
ASI+
ASI+
ASI-
ASI-
ADDRESS ERROR
ASI+
ASI+
ASI-
ASI-
90(3.54")
80(3.15")
4(0.16")
55(2.17")
9(0.35")
87(3.43")
4(0.16")
a)
b)
c) d)
e) f )
g)
h)
i )
j )
k)
l )
b)
m)
n)
n) m)
o)
p)

FX2N-32ASI-M AS-interface Master Block Introduction 1.
1-3
a) Groove for DIN rail mounting (Width of DIN rail: 35 mm <1.38">)
b) Hook for Din rail
c) Extension cable
d) Display: Station number, location of 32ASI-M or error code are displayed on this display.
e) Direct mounting holes (2-∅4.5 mm <0.18">)
f) U ASI LED : Lit when external power is supplied from the AS-interface power
supply.
g) ASI ACTIVE LED : Lit when 32ASI-M is normal operation.
h) POWER LED : Lit when the 5 V DC power is supplied from the main unit.
i) PRJ MODE LED : Lit when 32ASI-M is in configuration mode.
j) PRG ENABLE LED : Lit when 32ASI-M is in Automatic address programming enable.
k) FROM / TO LED : Lit when 32ASI-M is accessed from main unit.
l) CONFIG ERR LED : Lit when AS-interface system has a configuration error.
m)SET button
n) MODE button
o) Terminal screw (M3)
p) Extension connector

FX2N-32ASI-M AS-interface Master Block Introduction 1.
1-4
1.2 System configuration
• The maximum number of controllable slaves is 31.
However, the maximum number of controllable slaves may be limited according to the
programmable controller connected.
For this limitation, refer to subsection 1.3.2.
•Total extension distance is for 32ASI-M is 100 m (328.1')
(Up to 2 repeaters can be used on the system. A repeater may extend the total distance an additional
100 m (328.1').
AS-interface flat cable
Slave
(Sensor /
Actuator)
AS-interface
Power Supply
Slave
(Sensor /
Actuator)
Slave
(Sensor /
Actuator)
Slave
(Sensor /
Actuator)
AS-interface
Power Supply
32ASI-M
(Master)
FX
0N
,FX
1N
,
FX
2N
,FX
3U
Repeater
AS-interface flat cable

FX2N-32ASI-M AS-interface Master Block Introduction 1.
1-5
1.3 Applicable PLC
32ASI-M can be connected to FX3U, FX2N, FX1N, or FX0N Series PLCs. The I/O control points
of both the 32ASI-M and PLC CPU must not exceed the host PLC’s maximum I/O point
capacity.
Therefore, there is a limitation in the number of units (number of slaves) which can be
controlled according to the I/O points recognized by the with PLC's CPU (occupation)*1 as
follows.
*1 To use FX2N, FX1N, or FX0N Series PLCs, each AS-i slave station occupies 4 CPU I/O
points.
To u s e F X 3U Series PLC, each AS-i slave station occupies 8 CPU I/O points.
Note;
An 32ASI-M module cannot be attached to an FX series PLC that is using an FX2N-16CCL-
M module.
Only one 32ASI-M module can be connected to the PLC.
1.3.1 Controlled Maximum I/O Points of Each PLC
Table 1.1: Controlled Maximum I/O Points of Each PLC
PLC Type Maximum I/O Points
FX3U 384 points
FX2N 256 points
FX1N 128 points
FX0N 128 points

FX2N-32ASI-M AS-interface Master Block Introduction 1.
1-6
1.3.2 Maximum Controlled Slave Units
The 32ASI-M can connect up to 31 slaves. However, there is a limit to the maximum number of
controllable slaves according to the PLC connected.
32ASI-M calculates the number of active slaves which can be operated, and sets a limit which
cannot be exceeded.
Note:
There is a possibility that an active slave may not operate, even if it is within the system
limits.
1) Calculation for the number of active slaves which can be operated
The number of active slaves which can be operated by each PLC type is calculated as
follows.
a) FX0N, FX1N, FX2N
*1 Maximum I/O points, as shown in table 1.1.
b) FX3U
The value of A in Formula Mis obtained from Formula Nbelow. Note that when the Formula N
result is larger than 248, a value of 248 must be assigned to A.
A = (Maximum I/O points*2) - (Controlled I/O points <include occupied points>) ..........N
*2 Maximum I/O points, as shown in table 1.1.
( ) ( )
= Number of active slave
≤
31 Slaves
Maximum I/O points
*1
- Controlled I/O points
<include occupied points>
4
= Number of active slave = 31 Slaves ..........
M
A
8

FX2N-32ASI-M AS-interface Master Block Introduction 1.
1-7
2) Active slaves fall into 2 limitation categories.
a) Limitation 1
A slave which can operate is allocated the lowest available active slave address.
A slave which exceeds the number of allowable active slaves cannot operate.
b) Limitation 2
One slave requires 4 bits in either the upper or lower areas of a byte. If an active in an
upper or lower byte area cannot operate (through limitation 1) then any other active
slaves located in the remaining 4 bits of the upper or lower byte area cannot operate
either.

FX2N-32ASI-M AS-interface Master Block Introduction 1.
1-8
Limitation Example 1
- Connected PLC: FX1N-40MR + 32ASI-M
- Controlled I/O points of PLC: 48 points <FX1N(40 points) + 32ASI-M(8 points)>
Number of active slaves which can be operated: (128 - 48) ÷ 4 = 20
- Active slave addresses: 2, 3, 4, 6, 7, 8, 9, 10, 11, 12, 13, 15, 17, 19, 20, 21, 22, 23, 24,
25, 26 and 27
As these active slaves correspond only to limitation 1 in this example; The active slaves which
can be operated are 2, 3, 4, 6, 7, 8, 9, 10, 11, 12, 13, 15, 17, 19, 20, 21, 22, 23, 24 and 25.
(The active slaves which cannot be operated are 26 and 27 by limitation 1.)
3
BFM #0
BFM #1
2 1
CE flag
7654
11 10 9 8
15 14 13 12
19 18 17 16
23 22 21 20
27 26 25 24
31 30 29 28
BFM #2
BFM #3
BFM #4
BFM #5
BFM #6
BFM #7
: This area represents an operative
active slave address.
: This area represents an inoperative
active slave address refering to
lim itation 1
Upper byte Lower byte
Bit 0Bit 15