APAR AR247 series User manual

APAR - BIURO HANDLOWE
05-090 Raszyn, ul Gałczyńskiego 6
Tel. [phone]
E-mail: [e-mail]
Internet: www.apar.pl
OPERATING INSTRUCTIONS
AR247
HUMIDITY AND TEMPERATURE
CONTROLLER
Version 3.0.1
2016.12.01

2
Thank you for choosing our product.
This manual will help you use your controller correctly, safely and to its full potential.
Read this manual carefully before installing and putting your controller to use.
In case of additional questions, please contact the technical advisor.
CO TE TS
1. SAFETY PRI CIPLES..................................................................................................................................... 3
2. I STALLATIO GUIDELI ES....................................................................................................................... 3
3. GE ERAL CHARACTERISTICS OF THE CO TROLLER ............................................................................. 3
4. CO TE TS OF THE SET ............................................................................................................................... 4
5. TECH ICAL DATA......................................................................................................................................... 4
6. DIME SIO S OF THE DEVICE A D I STALLATIO DATA .................................................................... 5
7. DESCRIPTIO OF TERMI AL STRIPS A D ELECTRICAL CO ECTIO S ............................................ 6
8. IMPORTA T COMME TS PERTAI I G TO OPERATIO – using the suppression systems ............ 7
9. FU CTIO S OF BUTTO S A D LED I DICATORS ................................................................................. 7
9.1. FU CTIO BUTTO A D BI ARY I PUT ...................................................................................... 8
10. SETTI G OF THE CO FIGURATIO PARAMETERS .............................................................................. 9
11. QUICK ACCESS ME U ............................................................................................................................. 13
12. OUTPUT OPERATIO CO FIGURATIO ............................................................................................. 13
12.1. CHA GI G THE PRESET OUTPUT VALUES ................................................................................. 13
12.2. TYPES OF OUTPUT CHARACTERISTICS ....................................................................................... 13
12.3. A ALOG OUTPUT ........................................................................................................................... 14
12.4. PID REGULATIO ............................................................................................................................ 15
12.5. AUTOMATIC PID PARAMETER SELECTIO ................................................................................. 15
12.6. PID PARAMETER CORRECTIO .................................................................................................... 17
12.7. MA UAL A D REMOTE CO TROL FU CTIO ......................................................................... 17
13. MESSAGE A D ERROR SIG ALI G ...................................................................................................... 17
14. CO ECTI G THE CO TROLLER TO A COMPUTER A D AVAILABLE SOFTWARE....................... 18
15. RS485 COMMU ICATIO I TERFACE (acc. to EIA RS-485) ............................................................. 18
16. MODBUS–RTU SERIAL TRA SMISSIO PROTOCOL (SLAVE) .......................................................... 19
17. OTES ........................................................................................................................................................ 21
Please pay parti ular attention to fragments marked with this sign.
The manufa turer reserves its rights to modify the design and software of the devi e without deteriorating its te hni al parameters.
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3
1.
SAFETY PRINCIPLES
 before you start to use the devi e, be ome familiar with the present instru tions;
 in order to avoid ele tro ution or damage to the devi e, its me hani al and ele tri al installation must be
performed by qualified staff;
 before swit hing on the power supply, make sure that all ables and wires are properly onne ted;
 before making any modifi ations to the wire and able onne tions, swit h off the devi e's power supply;
 ensure proper operating onditions ompliant with the te hni al spe ifi ation of the devi e ( hapter 5, power
supply voltage, humidity, temperature).
2. INSTALLATION GUIDELINES
The devi e is designed so as to ensure an appropriate level of immunity to most interferen es that may o ur in
industrial environments. In environments of unknown level of interferen es, it is re ommended to implement the
following measures so as to prevent potential interferen e with the operation of the devi e:
a) do not supply the devi e from the same lines as high-power equipment without using appropriate power line
filters;
b) use able shields on power supply ables, sensor ables, and signal ables, whereby the earthing of the shield
should be single-point and lo ated as lose to the devi e as possible;
c) avoid running instrument (signal) ables in the dire t vi inity of and parallel to power distribution and power
supply ables;
d) it is re ommended to use twisted pair signal ables;
e) avoid proximity of remotely ontrolled devi es, ele tromagneti meters, high power loads, loads with phase or
group power ontrol, and other devi es that ause high impulse disturban es;
f) ground or zero metal rails on whi h rail-mounted devi es are installed.
Make sure to remove the prote tive film from the LED display before the first use of the devi e.
3. GENERAL CHARACTERISTICS OF THE CONTROLLER
 the devi e is intended for ontrol and monitoring of humidity and temperature in monitored premises;
 a high lass digital relative humidity and temperature sensor with a prote tive filter (ABS material as
a standard, slot width 1 mm);
 a probe integrated with the en losure, external on a wire or a stainless steel pipe;
 temperature ompensation of relative humidity measurement;
 a programmable digital filter that smoothens out and stabilizes the measurements;
 3 independent ON/Off type outputs, 2- and 3-way adjustment:
- output 1 (main): ON-OFF with hysteresis, PID, AUTOTUNING PID
- output 2, 3 (auxiliary/alarm): ON-OFF with hysteresis
- operating parameters: heating/humidifi ation, ooling/drying, relative alarms;
 0/4-20 mA (standard) or 0/2-10 V (option) analog outputs, ontinuous-adjustment, retransmission;
 possibility to onvert sele ted values to the standard of the analog output in the retransmission mode;
 al ulation of dew/frost temperature (°C) and absolute humidity (g/m
3
) for the pressure of 1 atmosphere
(1013 hPa);
 possibility to sele t a value to ontrol the operation of ea h output (any measured or al ulated value)
 programmable BIN digital input or F fun tional button to hange the operating mode of the ontroller:
start/stop of ontrol, manual mode for outputs, step hange of the set value (day/night), keyboard lo k,
view of values measured by the sensor (when al ulated values are displayed);
 advan ed PID parameter sele tion fun tion with fuzzy logi elements;
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 manual mode (open ontrol loop) available for binary outputs and the analog output, whi h makes it possible
to set the value of the output signal in the range of 0-100%; possibility of self-a tivation in the event of sensor
failure;
 a two-line LED digital readout with brightness adjustment: UPPER display - humidity (%RH or g/m
3
), LOWER
display - temperature (of the sensor or the dew/frost point, °C ) or the value set for output 1
 RS485 serial interfa e (galvani ally isolated, MODBUS-RTU proto ol, SLAVE);
 programmable values to be displayed (measured or al ulated values), adjustment, alarms, ommuni ation,
a ess, alibration options and other onfiguration parameters;
 a ess to onfiguration parameters prote ted with a user password or not prote ted with a password
 parameter onfiguration methods:
- from the film keypad lo ated on the front panel of the devi e;
- through the RS485 or the AR956 (AR955) programmer and the ARSOFT-CFG WZ1 software
(Windows Vista/7/8/10) or a user's appli ation, ommuni ation proto ol MODBUS-RTU;
 software and the AR956 (or AR955) programmer that enables viewing the measured value and qui k
onfiguration of single or ready sets of parameters that were saved earlier on the omputer for future use,
e.g. in other ontrollers of the same type ( opying of onfiguration);
 prote tion rating IP65 provided by the industrial en losure whi h improves reliability of operation thanks
to high resistan e to penetration of water and dusts and surfa e ondensation of steam inside of the devi e;
 options (to be sele ted at the time of ordering): type of measuring probe, 24 V AC/DC power supply,
SSR ontrol outputs, 0/2-10 V analog output, and RS485 interfa e;
 high a ura y, long-term stability, and immunity to interferen es;
 available a essories:
- AR956 or AR955 programmer;
- RS485/USB onverter.
- a filter with a metal mesh that improves prote tion of the sensor against dust, mesh size 20-25 μm
- measurement probes: AR281, AR282 (on a wire), AR283 (box type), AR284/L150/L250 (steel tube)
NOTE:
Before yo start working with the controller, make s re to become familiar with this operating instr ction
and perform proper electrical and mechanical installation, as well as config ration of the parameters.
4. CONTENTS OF THE SET
 ontroller
 operating instru tions;
 a warranty ard.
5. TECHNICAL DATA
Meas rement range for the probe
0÷100 %RH,
-
30÷80 °C,
do not po r water on the meas ring probe
Sensor cover (ABS material,
s
tainless steel mesh
)
mesh width: 0.15 mm, width of slots overs ABS: 1mm
diameter of ABS over: 15mm, length of ABS over: 40mm
Meas rement acc racy
(same as
for the SHT31 sensor made by
Sensirion)
-
humidity
typi ally ± 2% RH over the measuring range tra
nsmitter
-
temperature
typi ally
±0,3 °C
over the measuring range transmitter
Additional errors
-
hysteresis
±0,8 %RH
for
temperature 25 °C
-
long
-
term stability
<0.25 %RH/year
(1)
Meas rement period
and filtration
1
s, delay of programmable digital filter: 0
-
5 s
Response time
(63%) to step hange of the
measured value
8s for air flow > 3,6k
m/
h
and swit hed off program filtration
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Reado t meas rement resol tion
programmable: 0.1 or 1 %RH, °C , g/m
3
C
omm nication
interfaces
(RS485 and PRG, do
not use
simultaneously)
-
RS485 (galvani ally
separated), option
-
baud rate
s
2.4
-
57.6 kb/s,
- hara ter format 8N1 (8 data bits, 1 stop bit, no
parity bits)
- MODBUS-RTU proto ol (SLAVE)
-
PRG programm
ing
onne tion (no separation),
standard
Bi
stable
o tp ts
(3 relays or SSR type)
-
relay
s
(P1
-
P3), standard
1 main (SPDT), 8A / 250 VAC (for resistan e loads),
2 additional (SPST-NO), 5A / 250 VAC
-
SSR (SSR1
-
SSR3), option
transistor type NPN OC, 11 V
, internal resistan e 440 Ω,
Analog o tp t
(1 urrent [mA] or
voltage [V] output)
-
0/4
-
20 mA
(standard)
resolution 12 bit, output load apa ity Ro < 500 Ω
-
0/2
-
10 V (option)
resolution 12 bit, output load apa ity Io < 4 mA (Ro > 2,5 kΩ)
-
output e
rror
basi < 0.1% ±0.01%/°C of the starting range
Binary inp t BIN
(bistable)
onta t or voltage < 24 V, a tive when: short ir uit or <0.8 V
A 7
-
segment LED display
(2 lines 3 digits ea h, with brightness
adjustment)
-
upper
green, 14 mm high (presenta
tion of humidity %RH or g/m
3
)
-
lower
red, 14 mm high
LED signalization of:
-
bi
stable
outputs
a tivity
3 indi ators, red
-
messages and errors
a 7
-
segment display
-
measurement units
2 indi ators: red (%RH), green (°C)
Power s pply
(Usup)
-
230 VA
C (standard)
85
-
260 Va / 3VA
-
24 VAC/DC (option)
20
-
50 VAC
/ 3 VA, 22
-
72 VDC/
3W
Rated operating conditions
-
20
-
+60 °C, <100 %RH (no ondensation, do not pour water on
the probe)
Operating environment
air and neutral gases
Enclos re protection
rating and mo nting
method
IP65, industrial en losure, wall
-
mounted
Weight
approx. 340 g (with the probe integrated with the AR247/1
en losure)
Electromagnetic compatibility (EMC)
immunity: a ording to the PN
-
EN 61000
-
6
-
2 standard
emission: a ording
to the PN
-
EN 61000
-
6
-
4 standard
Notes: (1) - periodi alibration of the devi e in a ordan e with the requirements in for e at the installation site or on e a year
is re ommended
(2) - for ontrollers with software version below 1.1 measurement a ura y is onsistent with the
do umentation in luded with pur hase
6. DIMENSIONS OF THE DEVICE AND INSTALLATION DATA
a) general data and dimensions of the standard version (AR247/1, probe AR281)
Enclos re type
industrial IP65, Gainta G2104
Material
poly arbonate
Enclos re dimensions
120 x 80 x 55 mm (W x H x D)
Fixing methods
4 holes, dia. 4.3 mm, distan e 108x50
mm, a essible after the front over is
removed
Cond ctor cross
-
sections (separable
onne tors)
2.5 mm
2
(supply and bistable outputs),
1.5 mm
2
(others)

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b) dimensions for external probes in different designs
b.1) AR247/2 b.2) AR247/3 (probe AR283) b.3) AR247/L150 and L250
(probe AR282) (probe AR284/L150 or L250)
c) installation of abling
- isolate the power s pply before making any changes to the cabling
- remove the 4 s rews in the front board and take it off the devi e
- loosen 1 s rew in the display board and slide it out caref lly from the bolt terminals; onne tors for power
supply, output, and signal wires are now a essible; hapter 7
- the ele tri ables must be inserted into the en losure through able glands
- after the devi e has been mounted and the abling has been installed, assemble the devi e arefully
performing the work in the reverse order
- in order to a hieve the IP65 rating, the nuts of the able glands and the en losure over must be tightened
pre isely
NOTE:
In order to avoid any mechanical and electrostatic damage, one m st be very caref l when handling the
display board.
7. DESCRIPTION OF TERMINAL STRIPS AND ELECTRICAL CONNECTIONS
The wire terminals are a essible after the front over and the display board have been removed; hapter 6.
Table 7. Numbering and des ription of terminal strips
Terminals
Description
1
-
2
-
3
-
4
measurement probe input (white
-
brown
-
green
-
yellow)
5
-
6
binary input BIN ( onta t or voltage <24 V)
7
-
8
analog urrent output (0/4
-
20 mA) or voltage output (0/2
-
10 V)
PRG programming onne tion for ooperation with the programmer
(
only
AR956
or
AR955
)
9
-
10
RS485 serial interfa e (MODBUS
-
RTU transmission proto ol)
12
-
13
power supply input 230 VAC or 24 VAC/DC
14
-
15
-
16
relay
output P1 or SSR1 (14
-
15)
17
-
18
relay
output P2 or SSR2
19
-
20
relay
output
P3 or SSR3
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a) the numbers of the terminals and the method of onne ting ele tri al wires - des ription of terminals Table 7
NOTE:
For onne ting the devi e with a omputer through the PRG so ket, use only the AR956 or AR955 programmer.
Conne tion made with a regular USB able may ause damage to the equipment.
8. IMPORTANT COMMENTS PERTAINING TO OPERATION
–
using the suppression systems
If an indu tion load is onne ted to the transmitter's onta ts (e.g. a onta tor oil or a transformer), when the
onta ts open up there are frequent overvoltages and ele tri al ar s aused by the dis harge of the energy
gathered in the indu tion. The parti ularly negative onsequen es of su h overvoltages in lude redu ed servi e
life of onta tors and transmitters, damage to semi ondu tors (diodes, thyristors, and tria s), damage to or
interferen e with the ontrol and measurement systems, and emission of ele tromagneti field that interferes with
lo al devi es. In order to avoid su h onsequen es, the overvoltages must be redu ed to a safe level. The simplest
method is to onne t an appropriate suppression module directly to the terminals of the indu tive load.
Generally speaking, appropriate types of suppression ir uits must be sele ted for ea h type of indu tive load.
Modern onta tors are generally fitted with appropriate fa tory-made suppression ir uits. If su h ir uits are
la king, a onta tor with an integrated suppression system must be pur hased.
Temporarily, the load an be shunted with an RC system, e.g. R=47 Ω/1 W and
C=22 nF/630 V. The suppression ir uit must be onne ted to the indu tive load
terminals. The use of a suppression ir uit limits burning of relays onta ts in the
ontroller and redu es the likelihood of their sti king.
9. FUNCTIO
NS OF UTTONS AND LED INDICATORS
Fig. 9. Des ription of the front panel
LED indi ators
7-segment LED displays
programming buttons
a) button fun tions in the measurement display mode
B tton
Description
[and marking in the ontents of the instru tions]
[UP] or [DOWN]: hange of preset value for output 1 (parameter 13: St1 or 42: HSEt
when output 1 is in the manual mode, see hapters 10 and 12.7)
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[SET] :
- go to the qui k a ess menu ( hapter 11)
[UP]
and
[DOWN]
(at the same time): go to the parameter onfiguration menu (after hold
time longer than 1 s). If parameter 45: Prt = on (password prote tion is a tivated) enter
the a ess ode ( hapter 10)
[F]: a tivation of a fun tion programmed with parameter 46: FbF (after holding for more
than 1 se ond, hapters 9.1 and 10)
b) button fun tions in the parameter onfiguration menu and the qui k a ess menu ( hapters 10 and 11)
B tton
Description
[and marking in the ontents of the instru tions]
[SET]
:
- sele tion of the item displayed in the onfiguration menu (entering a lower level)
- edits the urrent parameter (the value blinks in the lower display)
- approves and saves the edited parameter value
[UP]
or
[DOWN]
:
- moves to the next or previous parameter (submenu)
- hanges the value of the edited parameter
or
[UP] and [DOWN] (simultaneously) or [F]:
- returns to the previous menu (higher level)
- an els hanges to the edited value (the blinking stops)
- returns to the measurement display mode (only [UP] and [DOWN]
after hold time >0.5 s)
) fun tions of the LED signaling diodes
Diode
[marking]
De
scription
1
2
3
signals swit hing on of outputs P1/SSR1, P2/SSR2, and P3/SSR3
%RH °C
indi ators of measurement units, green on for %RH, green off for g/m
3
, red °C )
9.1. FUNCTION UTTON
AND INARY INPUT
The fun tion button [F] and the binary input BIN have the same fun tion, whi h is programmable with parameter
46: FbF ( hapter 10). The binary input works with the bistate signal i.e. the supplied signal (voltage or swit h) must
be permanent (on/off type). Moreover, button [F] is ina tive when the input BIN is a tive (short ir uit or voltage <
0.8 V). A tivation or dea tivation of the fun tion is indi ated by appropriate messages on the display (des ribed
below in Table 9.1).
Table 9.1. Available fun tions of the [F] button and the BIN input
So rce Description (depending on the value of parameter 46: FbF) Message
or
FbF = non button [F] and input BIN are ina tive (default fa tory setting)
-
FbF = St3
step
-
wise hange of the preset value for the P1/SSR1 output
(day = parameter 13: St1 /night = 27: St3 , Table 10) St1 / St3
FbF = bLo keyboard lo k (with the ex eption of button [F]) bLo / boF
FbF = hd1 un onditional manual mode for the P1/SSR1 output ( hapter 12.7) hAn / hoF

9
or
FbF = hd2 un onditional manual mode for the P2/SSR2 output hAn / hoF
FbF = hd3 un onditional manual mode for the P3/SSR3 output hAn / hoF
FbF = hdA un onditional manual mode for the analog output hAn / hoF
FbF = StS ontrol start/stop (applies to all outputs) Sta / Sto
FbF = rHt un onditional view of the values measured by the sensor (%RH,°C ) rHt / roF
10. SETTING OF THE CONFIGURATION PARAMETERS
All the ontroller's onfiguration parameters are saved in a non-volatile (permanent) internal memory.
There are two parameter onfiguration methods:
1.
From the film keypad lo ated on the front panel of the devi e:
- from the measurement display mode go to the onfiguration menu (simultaneously press the [UP] and
[DOWN] buttons simultaneously for more than 1 se ond) If parameter 45: Prt = on (password prote tion
is on) the display will show the message Cod , and then 000 with the first digit blinking, use the buttons
[UP] or [DOWN] to enter the a ess ode (fa tory setting of parameter 44: PAS = 111 ), to move to su essive
items and to approve the ode, use the [SET] button
- after entering the main onfiguration menu (with the message CnF ) the upper display shows a mnemoni
name of the submenu (parameter groups: chH <-> chL <-> ot1 <-> et .)
- use the[UP] or [DOWN] button to move to the relevant submenu and then use the [SET] button to approve
the sele tion (the name of the parameter is displayed in the upper display and the value - in the lower display)
- by pressing the [UP] button, you an move to the next parameter, and by pressing the [DOWN] button - to the
previous parameter (e.g. dPH <-> dtH <-> FLH <-> et .; the list of the onfiguration parameters is presented
in Table 10)
- to hange the value of the urrent parameter, press briefly the [SET] button (the parameter blinks in the
edition mode)
- use buttons [UP] or [DOWN] to hange the value of the edited parameter
- approved the hanged value of the parameter by pressing the [SET] button or an el it by pressing the [F] or
[UP] and [DOWN] buttons (the latter two must be briefly pressed simultaneously) - by pressing the [UP] and
[DOWN] buttons or the [F] button again, you will return to the main onfiguration menu (a higher level)
- to exit the onfiguration: press the [UP] and [DOWN] buttons for a long moment or wait approx. 2 minutes
2.
Use the RS485 or the PRG port (AR956/955 programmer) and the ARSOFT-CFG WZ1 software ( hapter 14):
- onne t the ontroller to a omputer port, start and onfigure the ARSOFT-CFG WZ1 appli ation;
- after the onne tion has been established, the urrent measured value is displayed in the window
of the softwares
- setting and viewing of the devi e parameters is possible in the parameter onfiguration window
- new parameter values must be approved with the Approve changes button
- the urrent onfiguration an be saved in a file or set using values read from a file
NOTE:
!
- before dis onne ting the devi e from a omputer, press the Disconnect device button (ARSOFT-CFG WZ1)
- in the event of no response:
- in the Program options he k the onfiguration of the port and the MOD US Address of the device
- make sure that the serial port drivers in the omputer have been properly installed for the RS485
onverter or the AR956 (AR955) programmer
- dis onne t for a few se onds and then re onne t the RS485 onverter or the AR956 (AR955)
programmer
- restart the omputer

10
In the event of indi ations different than the a tual value of the relative humidity or the temperature of the sensor,
the zero and the sensitivity of a sensor an be tuned: parameters 3: coH and 8: cot, as well as 4: cGH and 9: cGt .
To restore the fa tory settings, when the power supply is swit hed on press buttons [UP] and [DOWN] and hold
them until the password menu appears (Cod), and then enter the following ode 112. As an alternative, a file with
default onfiguration an be used in the ARSOFT-CFG WZ1 software.
NOTE:
!
Do not perform onfiguration of the devi e with the keypad and through the serial interfa e (RS485 or AR956/955)
at the same time.
Table 10. List of onfiguration parameters
Parameter Range of variability of the parameter and description
Fa tory
settings
HUMIDITY CHANNEL DISPLAY CONFIGURATION (upper display) - submenu chH
0: dPH value for the upper
display
rHu
measured relative humidity [%RH]
rHu
AHu
al ulated absolute humidity [g/m
3
]
1: dtH resolution of
humidity indi ations
0 resolution 1 %RH or g/m
3
1
(0.1 %RH)
1 resolution 0.1 %RH or g/m
3
2: FLH filtration (1)
1 ÷
10
digital filtration of measured humidity (response time) 3
3: coH alibration
of the zero
± 20.0 %RH zero shift for the measured absolute humidity 0.0 %RH
4: cGH alibration of the
in lination
/5.0 ÷ 15.0 % amplifi ation (sensitivity) orre tion for relative humidity 0.0 %
LOWER CHANNEL DISPLAY CONFIGURATION (temperature or set value for output 1) - submenu chL
5: dPL value for the lower
display
StE
measured sensor temperature [°C]
StE
dPt
al ulated dew/frost point temperature [°C]
St1 set value for output 1 (13: St1 or 42: HSt in manual mode,
hapter 12.7)
6: dtt resolution of
temperature indi ations
0 resolution of 1 °C for temperature 1
(0.1 °C)
1 resolution of 0.1 °C for temperature
7: FLt filtration (1)
1 ÷
10
digital filtration of measured temperature (response time) 3
8: cot alibration of the
zero ± 20.0 °C zero shift for the measured sensor temperature 0.0 %RH
9: cGt alibration of the
in lination /5.0 ÷ 15.0 % amplifi ation (sensitivity) orre tion for the sensor
temperature 0.0 %
MAIN OUTPUT CONFIGURATION (P1/SSR1) – submenu ot1 - hapter 12 (12.2)
10: cS1 ontrol signal for
output 1
rHu measured relative humidity [%RH]
rHu
AHu al ulated absolute humidity [g/m
3
]
StE measured sensor temperature [°C]
dPt al ulated dew/frost point temperature [°C]
11: Ft1 failure status of
output 1 (2)
output status in the ase of la k of or damage to the measurement sensor:
nCh = no hange, oFF = swit hed off, on = swit hed on, hnd = manual mode
with set output signal level (parameter 42: HSt , hapter 12.7)
oFF
12: Fn1 fun tion of
output 1 ( hapter 12.2)
oFF = swit hed off, hnd = manual mode, inv = reverse ontrol (heating or
humidifi ation), dir = dire t ontrol ( ooling or drying) inv

11
13: St1 preset value 1 set value for output 1, hanges in the range of 15: Lo1 - 16: Hi1 50.0 %RH
14: H1 hysteresis of output
1 or PID tuning zone
0.0 ÷ 99.9
hysteresis for ontrol of the ON
-
OFF type or insensitivity zone
of PID tuning in the auto mode ( Aut ), hapter 12.5 1.0 %RH
15: Lo1 lower setting limit -30 ÷ 100 lower setting limit for the preset value 1: 13: St1 -30 %RH
16: Hi1 upper setting limit -30 ÷ 100 upper setting limit for the preset value 1: 13: St1 100 %RH
CONFIGURATION OF AUXILIARY OUTPUTS (P2/SSR2 and P3/SSR3) – submenu ot2 for output 2 and analogously ot3
for output 3 - hapter 12 - the parameters for output 2 are shown below
17: cS2 ontrol signal for
output 2
rHu measured relative humidity [%RH]
StE
AHu al ulated absolute humidity [g/m
3
]
StE measured sensor temperature [°C]
dPt al ulated dew/frost point temperature [°C]
18: Ft2 failure status of
output 2 (2)
output status in the ase of la k of or damage to the measurement sensor:
nCh = no hange, oFF = swit hed off, on = swit hed on, hnd = manual mode
with set output signal level (parameter 42: HSt , hapter 12.7)
oFF
19: Fn2
fun tion of output 2
( hapter 12.2)
oFF = swit hed off, hnd = manual mode, inv = reverse ontrol (heating or
humidifi ation), dir = dire t ontrol ( ooling or drying)
bon or boF = band ± St2 ( St3 for output 3 ) around St1 ,
doF or don = deviation from St1
inv
( oFF
for output
3)
20: St2 preset value 2 set value for output 2, hanges in the range of 22: Lo2 - 23: Hi2 50.0 °C
21: H2 hysteresis of output
2
0.0 ÷ 99.9 hysteresis of output 2 for ON-OFF type of ontrol 1.0 °C
22: Lo2 lower setting limit -30 ÷ 100 lower setting limit for the preset value 2: 20: St2 -30 °C
23: Hi2 upper setting limit -30 ÷ 100 upper setting limit for the preset value 2: 20: St2 100 °C
ANALOG OUTPUT CONFIGURATION – submenu outA - ( hapter 12.3)
31: rSA ontrol signal for
analog output in the
measurement
retransmission mode
(parameter 33: FnA = rEt )
rHu measured relative humidity [%RH]
rHu
AHu al ulated absolute humidity [g/m
3
]
StE measured sensor temperature [°C]
dPt al ulated dew/frost point temperature [°C]
32: At type of analog
output
depending on the order ode: for urrent output 0-20 mA ( 020 ) or 4-20 mA
( 420 ), for voltage output 0-10 V ( 010 ) or 2-10 V ( 210 )
020 mA
(010 V)
33: FnA fun tion of analog
output
oFF = off, hnd = manual mode, rEt = retransmission of measurement, ot1
= ontrol output, detailed des ription in hapter 12.3
oFF
34: LoA lower indi ation for
retransmission -30 ÷ 100
start of the output s ale
-
for 0/4 mA or 0/2 V (the parameter is
a tive only for measurement retransmission when 33: FnA =
rEt )
0.0 %RH
35: HiA upper indi ation
for retransmission -30 ÷ 100
end of output s ale
-
for 20 mA or 10
V (the parameter is
a tive only for measurement retransmission when 33: FnA =
rEt )
100 %RH
CONFIGURATION OF THE PID ALGORITHM AND THE MANUAL MODE – submenu Pid
36: tun type of PID tuning
( hapter 12.5)
oFF
off
oFF
Aut automati sele tion ( ontinuous tuning)
StP run-up method (fast)
oSc os illation method (longer)

12
37: Pb range of PID
proportionality 0 ÷ 200
0 - swit hes off the PID's a tion, a des ription of the PID
algorithm and asso iated topi s an be found in hapters
12.4 ÷ 12.6
0.0 %RH
38: ti PID integration time
onstant 0 ÷ 999 s
PID algorithm doubling time
0 swit hes off the integrating omponent of the PID
algorithm
0 s
39: td PID differentiation
time onstant 0 ÷ 999 s
PID algorithm lead time
0 swit hes off the differentiating omponent of the PID
algorithm
0 s
40: PoC PID signal
orre tion 0 ÷ 100 % in rease of the level of the ontrol signal for the PID algorithm
0 %
41: tc impulse period
3 ÷ 360 s
for bistable outputs (1, 2, 3) in the manual mode and the PID 5 s
42: HSt preset value of the
manual mode
0 ÷ 100 %
1% step
ontrol value for outputs in the manual mode, applies to all
outputs (1, 2, 3, and the analog output), hapter 12.7 50 %
ACCESS OPTIONS – submenu Acc
43: bSEt value hange
blo k for St1 , St2 , St3
oFF = no blo k, St1 = blo k of parameter 13: St1 , St2 = blo k 20: St2 ,
St3 = blo k 27: St3 , ALL = simultaneous blo k of hanges St1 , St2 and St3 oFF
44: PAS password 000 ÷ 999 password for the parameter onfiguration menu 111
45: Prt prote tion of the
onfiguration with a
password
oFF
entry into the onfiguration menu is not password-prote ted
on
on entry into the onfiguration menu is password-prote ted
COMMUNICATION OPTIONS AND OTHER CONFIGURATION PARAMETERS – submenu oth
46: FbF
fun tion of the [F] button
and the BIN input
( hapter 9.1)
non button [F] and input BIN are ina tive
non
St3 hange of the preset value (day/night) for output 1
bLo keyboard lo k (with the ex eption of button [F])
hd1 un onditional manual mode for output 1 (P1/SSR1)
hd2 un onditional manual mode for output 2 (P2/SSR2)
hd3 un onditional manual mode for output 3 (P3/SSR3)
hdA un onditional manual mode for the analog output
StS ontrol start/stop (applies to all outputs)
rHt
un onditi
onal view of the values measured by the sensor
(%RH,°C )
47: Add MODBUS-RTU
address 1 ÷ 247 individual address of the devi e in the RS485 network ( hapter
16) 1
48: br baud rates for RS485
and PRG port 2.4 kbit/s 4.8 kbit/s 9.6 kbit/s 19.2 kbit/s 38.4 kbit/s 57.6 kbit/s 19.2 kbit/s
49: brG illumination
brightness
30 ÷ 100 % brightness of the display, a 10% in rease 100 %
Notes: (1) – for FLH or FLt = 1 the response time is equal to 1 se ond; for FLH or FLt = 10 it is at least 5 se onds..
Higher degree of filtration means a more "smooth" measured value and a longer response time, whi h is
re ommended in the ase turbulent measurements.
(2) – the parameter also defines the state of the output outside of the measurement range

13
11. QUICK ACCESS MENU
In the measurement mode (when the measured or the al ulated values is displayed), it is possible to immediately
a ess ertain onfiguration parameters and fun tions without the need to enter a password. This possibility is
offered by the qui k menu, whi h an be a essed by pressing the [SET] button. The parameter is sele ted and
edited in the same way as des ribed above (in hapter 10).
Table 11. List of elements a essible in the qui k onfiguration menu.
Element
Description
St1
preset value 1 (parameter 13: St1 ), optional element - unavailable when parameter 12: Fn1 = hnd , hanges
blo ked during sele tion of parameters (tuning) of the PID ( hapter 12.5) and in the mode of hange of the
preset value 1 (ST1) to 3 (ST3) hapter 9.1
St2
preset value 2 (20: St2 ), optional element - unavailable when parameter 19: Fn2 = oFF or hnd
St3
preset value 3 (27: St3 ), optional element - unavailable when parameter 26: Fn3 = oFF or hnd
tSt
start/stop of PID tuning ( hapter 12.5), optional element - unavailable when parameter 36: tun = oFF
HSt
preset value of the manual mode (42: HSt ), optional element - available for outputs in the manual operation
mode
12. OUTPUT OPERATION CONFIGURATION
The programmable ar hite ture of the ontroller enables using it in many fields and appli ations. Before the
operation of the devi e starts, it is ne essary to set the parameters a ording to spe ifi requirements ( hapter 10).
A detailed des ription of onfiguration of the operation of outputs is given in hapters 12.1÷ 12.7.
The default (fa tory) onfiguration is the following: output 1 is onne ted with relative humidity (%RH), output 2 -
with sensor temperature (°C ), the ON/OFF onfiguration mode with hysteresis, output 3 and the analog outputs
are swit hed off (Table 10, Factory settings olumn).
12.1. CHANGING THE PRESET OUTPUT VALUES
The simplest way to hange the preset value for output 1 (parameter 13: St1 or 42: HSt when output 1 is in the
manual mode) is to use the [UP] button or the [DOWN] button in the measured value display mode. In the ase of
the other outputs, the qui k menu an be used ( hapter 11). As an alternative, it is possible to hange the preset
value in the parameter onfiguration mode (using the methods des ribed in hapter 10).
12.2. TYPES
OF OUTPUT CHARACTERISTICS
The mode of operation of ea h output is programmed using parameters 12: Fn1 , 19: Fn2 and 26: Fn3 , hapter 10,
Table 10.
a) basi operating hara teristi s of outputs

14
b) additional operating hara teristi s of outputs (applies only to outputs 2 and 3)
12.3. ANALOG OUTPUT
The standard of the output signal is determined by parameter 32: At ( hapter 10, Table 10). The analog output
an work in one of the following modes: retransmission of measurement (parameter 33: FnA = rEt ), in the manual
mode (33: FnA = hnd ) and as an automati ontrol output (33: FnA = ot1 ).
In the mode of retransmission of sele ted measurement (31: rSA ), the output signal is proportional to the
measured signal in the range set by parameters 34: LoA and 35: HiA (e.g. 0 mA for the measured value 0 °C when
LoA = 0 °C, 20 mA for 100 °C when HiA = 100 °C and, as appropriate, 10 mA for the half of the range, i.e. 50°C ).
Manual operation ( hapter 12.7) enables smooth hange of the output signal in the range of 0-100% with an
in rement of 1% and the initial value equal to the last value in the automati mode (measurement retransmission
or ontrol mode).
In the ontrol output mode, the ontrol parameters and their fun tions are identi al as in the ase of output 1 (the
appli able parameters are 10: cS1 , 11: Ft1 , 12: Fn1 , 13: St1 , 14: H1, and the PID algorithm and tuning
parameters). In the ontrol mode, the range of variability of the analog signal is ontinuous only for the PID
algorithm (with regards to proportionality, hapter 12.4), in the ase of ON-OFF ontrol with hysteresis, the output
assumes limit values (lower or upper, e.g. 0 mA or 20 mA), without intermediate values.

15
12.4. PID REGULATION
The PID algorithm enables a hieving smaller ontrol errors (temperature
or humidity) than the ON-OFF method with hysteresis. However, the
algorithm requires sele ting the hara teristi parameters for the spe ifi
ontrolled obje t (e.g. a furna e). In order to simplify the operation, the
ontroller is provided with the advan ed PID parameter sele tion
fun tions des ribed in hapter 12.5. Also, it is always possible to
manually orre t the settings ( hapter 12.6).
The ontroller works in the PID mode when the proportionality range
(parameter 37: Pb ) is not a zero value. The lo ation of the proportionality
range Pb in relation to the preset value (parameter 13: St1 ) is shown in
figures 12.4 a) and b). The impa t of the integrating and differentiating
omponents of PID regulation is determined by parameters 38: ti and
39: td . Parameter 41: tc determines the impulse period for output 1
(P1/SSR1). If the PID algorithm is implemented by the 0/4-20 mA or 0/2-
10 V analog output, parameter 41: tc is irrelevant. Then the output signal
may assume intermediate values from the entire range of variability of
the output.
Regardless of the type of the output, the orre tion of its state always
takes pla e every 1 s.
The prin iple of P-type regulation (proportional regulation) for output 1
is shown in figures d) and e) for the analog output figure ).
In the ase of type P and PD ontrol, the value of the pro ess
(temperature or humidity) usually does not rea h the set value and
be omes stabilized on a ertain deviation level. In order to eliminate this
deviation, orre tion of the output signal may be useful; it is a hieved
with parameter 40: PoC .
Fig. 12.4. Prin iple of the PID regulation:
a) lo ation of the proportionality range Pb in relation to the preset value
St1 for heating or humidifi ation (parameter 12: Fn1 = inv )
b) lo ation of the proportionality range Pb in relation to the preset value
St1 for ooling or drying (parameter 12: Fn1 = dir )
) state of the 0/4÷20 mA or 0/2÷10 V analog output
d) filling oeffi ient for output 1 (P1/SSR1)
e) state of output 1 (for the measured value within the proportionality
range)
12.5. AUTOMATIC PID PARAMETER SELECTION
The first step to use the PID parameter sele tion fun tion is to hoose the type of tuning (parameter 36: tun ,
hapter 10). The tuning is started automati ally when the regulation starts (after the power supply is swit hed on,
and by pressing the [F] fun tion button or the BIN binary input, when parameter 45: FBF = StS , hapter 9.1).
Moreover, the tuning an be stopped ( oFF ), and then started ( on ) at any time using the tSt fun tion available in
the qui k menu ( hapter 11). During the tuning (when the display shows, alternately with the measured value, the
message tvn ) the preset value must not be hanged (13: St1 or 27: St3 when 46: FbF = St3 ).
The value of parameter 36: tun determines the hoi e of the PID parameter sele tion method:
a) 36: tun = Aut - automati sele tion - the ontroller ontinuously he ks if there are appropriate onditions for

16
starting the tuning and tests the obje t in order to sele t the proper method. The algorithm ontinuously for es
operation in the PID mode. The ne essary ondition for initiating the PID parameter sele tion pro edure is that
the urrent measured value must be lo ated outside of the insensitivity zone defined as the sum of the values of
parameter 37: Pb and 14: H1 in relation to the preset value 13: St1 , as shown in figure 12.5.
Fig. 12.5.
Lo ation of the insensitivity zone for
heating/humidifi ation (12: Fn1 = inv ) and
ooling/drying (12: Fn1 = dir ).
In order to avoid unne essary a tivation of tuning, whi h may slow down the pro ess, it is re ommended to set
the highest possible value of H1, not less than 10-30% of the range of variability of the pro ess (the temperature
or the humidity). Testing of the obje t with temporary swit hoff of the output and the tun message also takes
pla e in the insensitivity band if sudden hanges in the measured value or preset value are dete ted.
The hoi e of the parameter sele tion method depends on the nature of the initial onditions. In the ase of a
stabilized ontrolled value, the run-up (qui k) method will be sele ted; in other ases, the os illation method
(slower) will be sele ted.
Automati sele tion enables optimum sele tion of the PID parameters for the urrent onditions at the obje t,
without the user's involvement. It is re ommended for variable value regulation (disturban e of the onditions
determined during the operation due to the hange of, e.g. the preset value or the weight of the furna e bat h).
b) 36: tun = StP – sele tion of parameters in the run-up phase (response to step for ing fun tion). During
determination of the obje t's hara teristi s, the algorithm does not ause any additional delay in rea hing the
preset value. This method is intended spe ifi ally for obje ts of stabilized initial value of the ontrolled value
(e.g. temperature in a old furna e). In order to avoid disturbing stabilized initial onditions, before the
automati tuning is swit hed on, the power supply of the operating element (e.g. a heater) should be swit hed
off using an external onne tor or the regulation start/stop fun tion should be used (the [F] button or the BIN
input). The power supply must be swit hed on immediately after the tuning is started, in the output swit h-on
delay phase. If the power supply is swit hed on later, an erroneous analysis of the obje t and improper sele tion
of PID parameters will result.
c) 36: tun = oSc – sele tion of parameters using the os illation method. The algorithm onsists in measuring the
amplitude and the period of os illation on a slightly lower level (in the ase of heating/humidifi ation) or higher
level (in the ase of ooling/drying) than the preset value, thus eliminating the risk of ex eeding the target value
at the obje t testing stage. During determination of the obje t's hara teristi s, the algorithm auses additional
delays in rea hing the preset value. This method is intended spe ifi ally for obje ts of unstable initial value of
the ontrolled value (e.g. temperature in a hot furna e).
The algorithms des ribed in items b and c omprise the following steps:
- delay of output swit h-on (approx. 15 s) - time for swit hing on the power supply of the operating element
(heating/ ooling power, fan, et .)
- determination of the obje t's hara teristi s
- al ulation and saving in the ontroller's permanent memory parameters 37: Pb , 38: ti , 39: td and 41: tc
- swit hing on the regulation with new PID settings;
Programmed interruption of automati tuning b or c (with the message Ert ) may take pla e if the onditions are
not met for orre t operation of the algorithm, su h as:
- the initial value is higher than the preset value for heating/humidifi ation or lower than the preset value for
ooling/drying;
- the maximum tuning time (4 hours) has been ex eeded;
- the pro ess value is hanging too fast or too slowly.
It is re ommended to restart the automati tuning b or c after a signifi ant hange in the St1 threshold or the
ontrolled obje t's parameters (e.g. the heating/ ooling power, the bat h weight, the initial temperature, et .).

17
12.6. PID PARAMETER CORRECTION
The automati tuning fun tion orre tly sele ts the PID regulation parameters for most pro esses; however,
sometimes it may be ne essary to orre t them. Due to the strong orrelation between those parameters, only
one parameter should be hanged and the impa t of the hange on the pro ess should be observed:
a) os illations around the threshold - in rease the range of proportionality 37: Pb , in rease the integration time
38: ti , redu e the differentiation time 39: td , (or hange by a half the impulse period of output 1, parameter 41:
tc )
b) slow response - de rease the range of proportionality Pb , differentiation times td and integration times ti
) over-regulation - in rease the range of proportionality Pb , differentiation times td and integration times ti
d) instability - in rease the integration time ti .
12.7. MANUAL AND REMOTE CONTROL FUNCTION
The manual mode enables setting the value of the output signal in the entire range of its variability (0-100%), thus
enabling operation in an open regulation loop (no automati oupling between the measured value and the
output signal). Manual operation is available individually for ea h output of the ontroller and is programmed
using parameters 12: Fn1 , 19: Fn2 , 26: Fn2 and 33: Fn3 , hapter 10, Table 10. Also, the outputs an be onfigured
for qui k (un onditional) manual mode ontrolled by:
- the [F] fun tion button or the binary BIN input, by programming, as appropriate, parameter 46: FbF ( hapter
9.1),
- measurement error of the sensor (range ex eeded or defe t) when 11: Ft1 , 18: Ft2, or 25: Ft3 is equal to hnd
In the ase of bistable outputs (1, 2, 3), the hange of the output signal onsists in setting the filling oeffi ient
(using parameter 42: HSt ) with impulse period defined by parameter 41: tc . The preset value of the manual mode
42: HSt = 0 stands for a permanently swit hed off output; value 100 stands for a permanently swit hed on output.
The value an be set dire tly using the [UP] or [DOWN] button (only in the ase of output 1, hapter 12.1) or using
the qui k menu ( hapter 11), or alternatively, in the parameter onfiguration mode (from the membrane keypad or
remotely using the RS485 or PRG serial port, hapters 10, 14-16 ).
13. M
ESSAGE AND ERROR SIGNALING
a) measurement errors:
Code
Possible ca ses of error
^^^
the measurement range of the sensor is ex eeded from the top
___
the measurement range of the sensor is ex eeded from the bottom
---
no ommuni ation with the sensor (the sensor is defe tive or the ele tri al onne tions are broken)
b) temporary messages and errors (one-time and re urring):
Code
Description of message
Cod
mode of entering the password for a ess to the onfiguration parameters, hapter 10
Err
the password is invalid
CnF
a ess to the parameter onfiguration menu
tun
implementation of the PID automati tuning fun tion, hapter 12.5
Ert
automati tuning error, hapter 12.5, error deletion using the
[UP]
and
[DOWN]
buttons (pressed
simultaneously)
StA / Sto
regulation start/stop, hapter 9.1
St1 / St3
hange of the preset value (day/night) for output 1, hapter 9.1

18
bLo / boF
keypad blo k on/off, hapter 9.1
hAn / hoF
un onditional manual mode on/off, hapter 9.1
SAU
saving of fa tory parameter values ( hapter 10)
14. CONNECTING THE CONTROLLER TO A COMPUTER AND AVAILA LE SOFTWA
RE
It may be useful (or ne essary) to onne t the ontroller to a omputer in the following situations:
- remote monitoring and re ording of urrent measurement data and pro ess (status of the outputs) ontrol;
- qui k onfiguration of parameters, to in lude opying of settings to other ontrollers of the same type
In order to establish ommuni ation over long distan es, it is ne essary to establish a onne tion in the RS485
standard with an available port in the omputer (dire tly or using an RS485 onverter), as des ribed in hapter 15.
Moreover, as a standard, the ontrollers are equipped with a PRG port whi h enables onne ting to a omputer
using an AR956/955 programmer (without galvani separation, able length approx. 1.2 m). Both the programmer
and the RS485 onverter require installation of the supplied serial port drivers on the omputer. Communi ation
with devi es is effe ted using a proto ol ompatible with MODBUS-RTU ( hapter 16). The following appli ations
are available (on a CD supplied with the AR956/955 programmer or to be downloaded from the Internet at
www.apar.pl, Download se tion, for operating systems Windows Vista/7/8/10):
Name
Software description
ARSOFT-CFG WZ1
(free)
-
display of urrent measurement data from the onne ted devi e
- onfiguration of measurement hannels, settings ranges, ontrol options, alarms, display,
ommuni ation, a ess, et . ( hapter 10)
- reation on the disk of a " fg" file with the urrent onfiguration of the parameters for
future use ( opying of onfiguration)
- the program requires ommuni ation with the ontroller via the RS485 or PRG
(AR956/955) port
ARSOFT-WZ2
(payable)
-
display and re ording of urrent measurement data from a ma
ximum of 30 hannels (only
from devi es made by APAR)
- the program requires ommuni ation with the ontroller via the RS485 or PRG
(AR956/955) port
The detailed des riptions of the aforementioned appli ations an be found in the installation folders.
NOTE:
!
Before establishing the onne tion, make sure that the MODBUS address of the devi e (parameter 47: Add ) and
the speed of transmission (48: br ) are the same as the settings of the software. Moreover, in the software, set the
number of the COM serial port in use (in the ase of the RS485 onverter or the AR956/955 programmer it is the
number assigned by the operating system during installation of the drivers).
15. RS485 COMMUNICATION INTERFACE (acc. to EIA RS
-
485)
The installation spe ifi ation for the RS485 interfa e is the following:
- maximum able length - 1 km (observe the installation guidelines, hapter 2, sub-items b, , and d)
- maximum number of devi es in a RS485 line - 30, in order to in rease the number, use RS485/RS/485 amplifiers
- termination and polarizing resistors when the MASTER is at the start of the line (Fig. 15):
- at the start of the line - 2 x 820 Ω to the ground and +5 V of the MASTER and 150 Ω between lines
- at the end of the line - 150 Ω between lines
- termination and polarizing resistors when the MASTER is in the enter of the line:
- at the onverter - 2 x 820 Ω, to the ground and +5 V of the onverter

19
- at both ends of the line - 150 Ω ea h between lines
Equipment from different manufa turers that form the RS485 network (e.g. RS485 onverters/USB) may have
integrated polarizing and terminating resistors; in su h a ase there is no need to use external elements.
Fig. 15. Pi torial diagram of the RS485 network
16. MOD US
–
RTU SE
RIAL TRANSMISSION PROTOCOL (SLAVE)
Chara ter format : 8 bits, 1 stop bit, no parity bit
Available fun tions : READ - 3 or 4, WRITE - 6
Table 16.1. Claim frame format for the READ f nction (frame length - 8 bytes):
address of
the devi e
fun tion
4 or 3
read register address:
0 ÷ 65 (0x0041)
number of read registers:
1 ÷ 16 (0x0010) CRC he k sum
1 byte
1 byte
2 bytes (HB
-
LB)
2 bytes (HB
-
LB)
2 bytes (LB
-
HB)
Example 16.1. Reading of a register with address 0: 0x01 - 0x04 - 0x0000 - 0x0001 - 0x31CA
Table 16.2. Claim frame format for the WRITE f nction (frame length - 8 bytes):
address of
the devi e fun tion 6
write register address:
0 ÷ 65 (0x0041)
write register value
CRC he k sum
1 byte
1 byte
2 bytes (HB
-
LB)
2 bytes (HB
-
LB)
2 bytes (LB
-
HB)
Example 16.2. Entry in a register with address 10 (0xA) with the 0 value: 0x01 - 0x06 - 0x000A - 0x0000 - 0xA9C8
Table 16.3. Response frame format for the READ fun tion (minimum frame length - 7 bytes):
address of
the devi e
fun tion
4 or 3
number of bytes in the
data field (max. 16*2=32
bytes)
data field - register value CRC he k sum
1 byte
1 byte
1 byte
2
÷ 32
bytes (HB
-
LB)
2 bytes (LB
-
HB)
Example 16.3. Response frame for register value equal to 0: 0x01 - 0x04 - 0x02 - 0x0000 - 0xB930
Table 16.4. Response frame format for the WRITE fun tion (frame length - 8 bytes):
opy of the laim frame for the WRITE fun tion (Table 16.2)
Table 16.5. Special answer (errors: fun tion field = 0x84 or 0x83 in the ase of the READ fun tion and 0x86 in the
ase of the WRITE fun tion):
Error code
(HB-LB in the data field)
Error description
0x0001
non
-
existing register address
0x0002
wrong write register value
0x0003
improper fun tion number

20
Example 16.5. Error frame for a non-existing read register address:
0x01 - 0x84 - 0x02 - 0x0001 –0x5130
Table 16.6. Map of registers for the MODBUS-RTU protocol
Register
address
HEX (DEC)
Val e
(HEX or DEC)
Description of register and access type
(R- read only register, R/W - read and write register)
0x00 (0) 0 not used or reserved R
0x01 (1) 2470 devi e type identifier (AR247) R
0x02 (2)
10 ÷ 99 ontroller software (firmware) version R
0x03 ÷ 0x05 0 not used or reserved R
0x06 (6) 0 ÷ 7 urrent status of outputs 1, 2, 3: bits 2, 1, 0, bit=1 means the output is
swit hed on R
0x07 (7) 0 ÷ 20000 urrent state of the analog output (0 ÷ 20000 μA or 0 ÷ 10000 mV) R
0x08 (8)
0 not used or reserved R
0x09 ÷ 0x0C -300 ÷ 1000 measured and al ulated values (relative humidity %RH, g/m
3
, ambient
temperature °C, dew point °C), resolution 0.1, ode U2 (16-bit) R
0x0D (13) -300 ÷ 1000 urrent preset value for output 1 R
0x0E ÷ 0x0F 0 not used or reserved R
Config ration parameters (chapter 10, Table 10)
0x10 (16) 0 ÷ 1 parameter 0: dPH value indi ated for the upper display R/W
0x11 (17) 0 ÷ 1 parameter 1: dtH resolution of humidity indi ations R/W
0x12 (18) 0 ÷ 10 parameter 2: FLH digital filtration of measured humidity (response time) R/W
0x13 (19) -200 ÷ 200 parameter 3: coH zero shift for the measured absolute humidity R/W
0x14 (20) -150 ÷ 150 parameter 4: cGH amplifi ation (sensitivity) orre tion for relative humidity R/W
0x15 (21) 2 ÷ 4 parameter 5: dPL value indi ated for the lower display R/W
0x16 (22) 0 ÷ 1 parameter 6: dtt resolution of temperature indi ations
R/W
0x17 (23) 0 ÷ 10 parameter 7: FLt digital filtration of measured temperature (response time) R/W
0x18 (24) -200 ÷ 200 parameter 8: FLt zero shift for the measured sensor temperature R/W
0x19 (25) -150 ÷ 150 parameter 9: FLt amplifi ation (sensitivity) orre tion for the sensor temperature
R/W
Configuration parameters of outputs 1, 2, and 3 ( output index KA = 0-2, KA=0=output 1, KA=1=output 2, KA=2=output 3)
0x1A (26) +KA*7 0 ÷ 3 parameter 10+KA*7: cS ontrol signal for output (1, 2, or 3) R/W
0x1B (27) +KA*7 0 ÷ 3 parameter 11+KA*7: Ft failure status of output (1, 2, or 3)
R/W
0x1C (28) +KA*7 0-3 or 0-7 parameter 12+KA*7: Fn fun tion of output (1, 2, or 3) R/W
0x1D (29) +KA*7 -300 ÷ 1000 parameter 13+KA*7: St preset value (1, 2, or 3) R/W
0x1E (30) +KA*7 0 ÷ 999 parameter 14+KA*7: H hysteresis of output (1, 2, or 3)
R/W
0x1F (31) +KA*7 -300 ÷ 1000 parameter 15+KA*7: Lo lower setting limit for the preset value (1, 2, or 3) R/W
0x20 (32) +KA*7 -300 ÷ 1000 parameter 16+KA*7: Lo upper setting limit for the preset value (1, 2, or 3) R/W
0x2F (47) 0 ÷ 3 parameter 31: rSA ontrol signal for the analog output (for retransmission) R/W
0x30 (48) 0 ÷ 1 parameter 32: At type of analog output
R/W
0x31 (49) 0 ÷ 3 parameter 33: FnA fun tion of analog output R/W
0x32 (50) -300 ÷ 1000 parameter 34: LoA lower indi ation for retransmission R/W
0x33 (51) -300 ÷ 1000 parameter 35: HiA upper indi ation for retransmission R/W
0x34 (52) 0 ÷ 3 parameter 36: tun type of PID tuning R/W
0x35 (53) 0 ÷ 2000 parameter 37: Pb range of PID proportionality R/W
0x36 (54) 0 ÷ 999 parameter 38: ti PID integration time onstant R/W