Astral Pool LumiPlus FLUIDRA CONNECT User manual

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LUMIPLUS
MODBUS MANUAL V2
© Fluidra, S.A. 2013. All Rights Reserved.
All the trademarks are registered by Fluidra SA and/or its a iliates, or its respective owners. Fluidra
SA and its licensors will own all right, title and interest to the manual, technology and in ormation
including all portions, copies or modi ications thereo .
Every e ort has been made to ensure that the in ormation given is correct. However, due to
continuous product improvement, Fluidra reserves the right to make changes to products and
technical data without prior notice.

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1. INTRODUCTION TO MODBUS AND PRODUCT 4
1.1. Principle o operation 4
1.2. Basic Characteristics 4
2. ELECTRICAL CONNECTIONS 5
3. CABLE CHARACTERISTICS 5
4. BUS ISOLATION AND TERMINATION RESISTORS 6
5. PANEL INDICATOR 7
6. MODBUS FUNCTIONS 7
6.1. Functions supported 7
6.2. Exception responses 8
7. DEVICE DESCRIPTION AND CONFIGURATION 8
7.1. General Description 8
7.2. State Machine Diagram 9
7.3. Address and baud rate selection 10
7.3.1. Address setting 10
7.3.2. Baud rate selecti n 10
7.4. Broadcasting 11
7.5. Watchdog 11
7.5.1. Watchd g Triggering 11
7.5.2. Watchd g SETUP 12
7.5.3. Watchd g predefined C l r/Sequence 13
8. OPERATION MODES 14
8.1. Basic mode 14
8.1.1. Start Predefined C l r/Sequence 14
8.1.2. Checking current state 15
8.1.3. Actuat r Change Request 16
8.1.4. Request ON 16
8.1.5. Request OFF 17
8.1.6. Changing C l r 17
8.1.7. Changing Sequence 19
8.1.8. Changing Speed 20
8.1.9. Sleep Time 21
8.1.10. Checking LATCHED Alarms Register 21
8.1.11. Checking instantane us err r Register 22
9. BASIC MODBUS-RTU REGISTER MAP 23
1 . TROUBLESHOOTING GUIDE 28
11. PRODUCT REVISION 28

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1. INTRODUCTION TO MODBUS AND PRODUCT
Thank y u very much f r purchasing ur Lumiplus with MODBUS-RTU features. This manual is
intended f r pr fessi nal installer, if y u are n t, please c nsult t y ur fficial distribut r.
MODBUS is an pen field bus successfully used thr ugh the w rld t c nnect field devices t a main
c ntr ller. This is the reas n why MODBUS has been ur ch ice t ffer t ur cust mers and
partners an aut mated s luti n easy t integrate n t nly with ur brand pr ducts but als with a
vast c llecti n f third party c mp nents and c ntr llers
MODBUS, MODBUS-RTU and ther related names are registered trademarks f MODBUS
Organizati n. Further inf rmati n and d cumentati n can be f und at http://www.M dbus. rg/
1.1. PRINCIPLE OF OPERATION
The Lumiplus implements MODBUS-RTU as a c ntr l-c mmunicati ns feature that all ws its
perati n and supervisi n tasks fr m a MODBUS aut mati n envir nment. Preventive maintenance
and fault analysis is als p ssible thanks t the implementati n f internal registers in the Lumiplus
with the m re relevant perati nal and err r events.
Whenever the Lumiplus is installed, y u are n t f rced t c nnect it t a MODBUS system, as far as
y u d n t aim t c ntr l r supervise it externally. The Lumiplus can run in l cal m de, as
traditi nally d ne, with ut using the MODBUS layer.
H wever, we expect that the implementati n f MODBUS-RTU in the Lumiplus will pen t ur
advanced cust mers and partners a wide range f new pp rtunities and implementati n scenari s
thanks t the simplicity and flexibility f the MODBUS-RTU layer.
Using a MODBUS-RTU message, the Lumiplus can change t a specific c l r, sequence r vel city,
rep rt err rs, hist rical data and s n, giving t the user/installer a wide range f new features
based in the aut mati n f an already existing and pr ved Lumiplus.
1.2. BASIC CHARACTERISTICS
The MODBUS c mmunicati n system pr vides a Master/Slave implementati n am ng devices sharing
a physical c nnecti n. F r the Lumiplus, the physical c nnecti n is a RS485 half duplex serial layer,
which has been ch sen am ng ther pti ns due t its wide implementati n and r ughness.
F r the Lumiplus, a RS-485 half duplex wired c nnecti n has been implemented and the pr ject r is
designed t run in a single-master system. In this implementati n, Master and Slave figures has a
clear r le that is crucial t clear understand f r a pr per system implementati n.
Master Device: Device that c ntr ls the data exchange in the bus and, if necessary, implements c -
rdinati n tasks am ng different slaves (i.e. PLC Pr grammable L gic C ntr ller, SCADA, etc).
Slave Device: Devices c nnected t the bus that attends t the requests fr m the master, either
rep rting inf rmati n r executing tasks as per Master request.

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2. ELECTRICAL CONNECTIONS
Image 1 Electrical Connection
N te: s me manufacturers assign f r the RS-485 p rt the “A” c nnecti n as a “+”, and “B” as a “-“,
while thers reverses this n menclature. The Lumiplus uses the “A” as “+”, and the “B” as “-”. Mind
this aspect when c nnecting t the bus devices c ming fr m different manufacturers.
3. CABLE CHARACTERISTICS
The rec mmended wiring f r a MODBUS-RTU C mmunicati n is based in a linear structure, active
bus with terminati n at b th ends. Is p ssible c upling and unc upling f devices during perati n
with ut affecting ther devices. The wire shall be twisted and shielded acc rding t EN 50 170.
The values f transmissi n rate supp rted f r the device, all w maximum cable length f 1,200 m
with ut repeaters, r up t 10 km using repeaters, when installati n is acc rding t the standard.
F r the balanced pairs used in an RS485-system, a Characteristic Impedance with a value higher than
100 Ohms may be preferred, especially f r 19200 and higher baud rates.

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4. BUS ISOLATION AND TERMINATION RESISTORS
If the c mmunicati n bus is accessible f r the user, it shall be d uble insulated. As far as in general
the accessibility f the bus t users will depend n each single installati n, safety is lati n has been
implemented in the Lumiplus physical bus layer. M re ver, f r safety purp ses, it is rec mmended t
ensure that ther devices sharing this bus als implements this insulati n.
Additi nally, the use f bus insulated devices n t nly enhances the security level, furtherm re
increases the equipment reliability, larger immunity t electr magnetic interference, l nger life,
higher reliability, m re stability ver the range f temperatures.
Whenever single r multiple devices are c nnected sharing a bus physical c nnecti n, it is
rec mmended t use terminating resist rs at the ends f the bus, even m re when use large cable
length r high speed data rates. The terminating resist r is used t prevent an RF signal fr m being
reflected back fr m the end, causing interference. The terminating resist r must be in b th ends f
the bus, c nnected in parallel (as sh wn in the image bel w). A typical value f this resistance is
120Ω, 0.5W. The value f the resist r must be the same in b th ends. The terminating resist rs are
the resist rs ܴ
்
f the image bel w
Image 2 Terminating Resistors

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5. PANEL INDICATOR
The Lumiplus m dule has a LED that is ON when the m dule is p wered. When data is transmitted
thr ugh M dbus, this LED blinks.
Image 3 Lumiplus Panel Indicator
6. MODBUS FUNCTIONS
6.1. FUNCTIONS SUPPORTED
Please, be care ul at the possible actuations, and make sure that the unction used is the correct.
BIT ACCESS MODE
Functi ns in bit access m de are implemented acc rding t the MODBUS-RTU standard described in
http://www.M dbus. rg/d cs/M dbus_Applicati n_Pr t c l_V1_1b.pdf
0x01 READ COILS
0x0F WRITE MULTIPLE COILS
0x05 WRITE SINGLE COIL. This function is not implemented in the Lumiplus. Since they can be work
rounded with the functions “Write Multiple Coils”, to the special case where the number of coils to be
written is one.
0x02 READ DISCRETE INPUTS.
REGISTER ACCESS MODE
Functi ns in register access m de are implemented acc rding t the MODBUS-RTU standard
described in http://www.M dbus. rg/d cs/M dbus_Applicati n_Pr t c l_V1_1b.pdf. In general
registers are unsigned 16 bit c ded.
0x03 READ HOLDING REGISTERS
0x04 READ INPUT REGISTERS
0x10 WRITE MULTIPLE REGISTERS

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6.2. EXCEPTION RESPONSES
Excepti n resp nses are implemented acc rding t the MODBUS-RTU standard described in the
chapter MODBUS excepti n resp nses:
http://www.M dbus. rg/d cs/M dbus_Applicati n_Pr t c l_V1_1b.pdf
The excepti ns implemented are fr m 1 t 3.
7. DEVICE DESCRIPTION AND CONFIGURATION
7.1. GENERAL DESCRIPTION
If a request is made thr ugh M dbus and later an ther ne with the rem te c ntr l, the M dbus will
indicate the c l r set thr ugh M dbus, it is because the unidirecti nality between M dbus m dule
and the Lumiplus m dulat r c ntr lled tr ugh rem te c ntr l.
When a simultane us request is made thr ugh M dbus and rem te c ntr l, and there is n c nflict,
the last request will take effect.
In general, there is n t check n the c nstancy f the values sent t specific registers. Theref re is the
perat r resp nsibility t check that c nsistency.
In this manual, the numbers in hexadecimal have been represented with the f rmat 0xZZ, where ZZ is
the number.
The register map that g verns the7.2 State Machine Diagram and all that is explained bel w is in the
chapter 9 Basic M dbus-RTU register map.

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7.2. STATE MACHINE DIAGRAM
When the sistem P wers ON, the state is always Start. The Start m de d es n t indicates a Light ON,
it nly idicates the alimentati n f the Lumiplus, and NO request has been made after alimentati n.
It is p ssible t change the Start Predefined C l r, Sequence and Speed, alls is p ssible t c nfigure
the Start m de with all the Lights OFF. Fr m Start is p ssible t g t Request C l r State tr ugh
requesting an Update Predefined C l r, is p ssible t g t Request Sequence & Speed State thr ugh
requesting an Update Sequence & Speed r g t the Watchd g State if it triggers.
Diagram 1 State Machine Diagram

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7.3. ADDRESS AND BAUD RATE SELECTION
7.3.1. ADDRESS SETTING
The address f the Lumiplus in the bus is set thr ugh the 0x00 H lding Register.
ID_Address: Address f the Lumiplus in the bus.
Fact ry setting: 0x30.
Suggested range: 0x30 - 0x3F.
The fact ry default f r the Lumiplus is (0x30). H wever y u can change this value by sending writing
this h lding registers and as far as y u check t d n t intr duce c llisi ns r c nflicts with ther
slave’s addresses.
Example: changing the address ID fr m 0x30(default) t 0x31.
Transmit Message: 30 10 00 00 00 01 02 00 31 3E 15
Where:
30 is the slave address. (The actual ID address).
10 is the functi n used. Write Multiple Registers.
00 00 is the address f the H lding Register t be written.
00 01 is the number f H lding Registers t be written. 1 in this case.
02 is the number f bytes f data t be sent.
00 31 is the new ID address.
3E 15 is the CRC.
7.3.2. BAUD RATE SELECTION
The Baud Rate selecti n f the serial c mmunicati ns with the Lumiplus set thr ugh the 0x01 H lding
Register. By default, 9600 bps and 8E1 (8 data bits, Even Parity, 1 st p bit) is implemented. H wever,
19200 bps and 2 st p bits are als supp rted (when NO parity is implemented).
The reas n f r supp rting N2 frames is t keep the MODBUS standard requirement f sending eleven
bits per byte ( 1 start + 8 data + 1 parity + 1 st p). Whenever a N parity c nfigurati n is ch sen, then
2 st p bits are intr duced t keep the eleven bits per byte required by the standard.
F r c mpatibility reas ns, N1 frames are als supp rted. H wever, mind that using this selecti n y u
are n t fulfilling the MODBUS standard requirements as far as nly ten bits per byte are used.
Acc rding t this, the baud rate and frame selecti n is c mpleted defining the baud rate (in bauds),
number f data bits, parity and number f st p bits.