Mitsubishi FX-2AD-PT User manual

AMITSUBISHI
Miscellaneous
- Item Specification
Photo-coupler Isolation between analog anddigitalCIrcults.
No lsolatlon between analog channels
8 points taken from the FX expansion bus
(can be either inputs or outputs)
Isolation DC/DC converter isolation of power from FX MPU.
Number of occupied I/O points
- 2.1 Uslna crlmntormlnatlonr
less than 0 Usecrimpterminationsofthetypeindicatedontheleft.
6.8mm (0 27)
Use M3 5 (0.l4) and 8 ka . cm.
Secure the terminationusing a tightening torqueof between 5
PROGRAMMABLECONTROLLERS
LK!msEE.F
-
less than
6 8mm (0 27) 0 Wireonlytothemoduleterminalsdiscussed inthismanual.Leave
- - FX-QAD'&PT .
SPECIAL; .. FUNCTION ,. BLOCK
USER'S GUIDE
JY992D55701A
allothers vacant.
Thls manual containstext, diagrams and explanations which w~ll guide the readerinthe correct installation
and operation of the FX-2AD-PT special function block and should be read and understood before attempting
to installor use the unit.
MANUAL.
Further informatton can be foundinthe FX PROGRAMMING MANUAL and FWFX2c SERIES HARDWARE
a B INTRODUCTION
El I1
INSTALLATIONNOTESANDUSAOE I
3.4 Buffor momoryasslanmont
I EFM I
I
The FX-2AD-PT communicates withthe
programmable controller through use of buffer
memories.
r ofsamplesfor averaging
= 8 Range = 1to4096
3.1 Oonorrl r~ocWlcatlon
Item
Same as those for the
FX base unit
General specifications
Specification
The FX-PAD-PT analogblock amplifies the input from two platinum temperature sensors (PT 100,
3 wire, 100
R ) and converts the datainto12 bit reading's stored in the Main Processing Unit(MPU).
Both Centigrade
(C) and Fahrenheit(OF) can be read. Reading resolutionis 0.2'C/0.36'F.
All data transfers and parameter setups are adjusted through software control of the FX-2AD-PT ; by
useof theTOIFROM applied instructionsinthe FX PC.
Note
: FX programmable controllers versions 2.0 or later (those with serial number13XXXX orlarger)
are requiredas theseunitshave the TO/FROM applied instructions In theirinstructionset. All
FXxModels may be used.
The FX-2AD-PT occupies 8 points ofI/O on theFX expansion bus. The 8 points can be allocated from
either inputs or outputs. The FX-PAD-PT draws 30mA from the5V rail
of the MPU or powered extension
unit.
# 5
PresenVCurrent temperature
CHI
# g
in unltsof 0.1 'C
CH2 66
Averaged temperature
CHI BFMs
#0, #3, #4, #7, #8, #11, #12, #15, #16.
#19 to
#28 and #31 are reserved.
For BFMs wlthout the
" " mark, data canbe
readby the programmable controller usingthe
FROM command.
110
in unitsof 0.1%
CHZ
113
CH2
#14
Averaged temperature
CHI inunits of 0.1.F
3.2 Power SUDDIY r~oolflcrtlon
Item
Digital circuits
24V DC k lo%, 50mA
Analog circuits
Specification
5V DC, 30mA
(internal power supply from base unit)
BFMs (buffer memories) marked with an " "
can be written tofrom the programmable
controller usmg the TO command.
(1) FFMs#9, #10 and #17,#18 store the current valueof the input data. Thls valueisinuntts of 0.1 'c or 0.1
F, but the resolutionis only 0.2% or 0.36.F.
(2) A number of recently converted readings are averaged to giveasmoother read out. The averaged data
isstored inBFMs #5, #6 and#13, #14.
(3) The number of samples to be averaged are assignedinBFMs #1 and#2.Only the range 1 to 4096 is
valid. Values outside this range are ignored. The default value of 8 is used.
1.1 Extornal dlmenslonr
3.3 Performance r~oclflcatlonr
Weight : Approx.0.5kg(1.1Ibs)Dimensions : mm(inches)
Analoa huts
Centigrade I Fahrenhelt
Item Both
'c and 'F readlngs are available by reading
M3 5 (0.14)
A Any connectcon to these terminals
may damage
the FX-PAD-PT.
Mountcng holes
il
the appropriate buffer memory area.
Platinum temperature
PT 100 sensors (100 R ), 3-wire,
2channel(CHl,CH2),
3850 PPMIY: (DIN 43760, JIS C1604-1989)
Analog Input signal
Current to senor 1mA. sensor:
100 R PT 100
Compensatedrange -1
00C to +600'c I -1°F t0+1112"F
-1 OOO to *OOo -1480 to +11120
12-bit conversion
11 data bits +1 signbit
-see section
7.0 for special EMC considerations
+- 1 H full scale (compensated range)
Dlgltaloutput
Minimum resdvaMe temp.
0.2c I 0.36.F
Overallaccuracy
Conversion
speed
15 ms for2 channels
- 3.5 Status lnformrtlon
(1) Identification CodeBuffer MemoryBFM #30
DIN rad
mounting
slot
The identificationcode or IDnumber for a Special Block is read from buffer memory BFM #30 using the
FROM command.
Thlsnumber for the FX-2AD-PT unitisK2020.
The programmable controller can use this facilityin itsprogramtoidentify the special block before commencing
data transfer from and to the special block.
Analoa Inmtr cont
(2) Status InformationBuffer MemoryBFM #29
TERMINAL LAYOUTS
I
Bit devicesof BFM #29
AJD conversion isstoppedb 0 : Error
OFF
ON
No error
When any ofblto b3 is ON
'1 : The cable of the PT 100 sensor ora twisted shielded
cable should be used forthe analog input cable.
This analog input cable should be wired separately
from power hnes or any other lines whlch may induce
noise.
The three wire method improvesthe accuracy of
the sensors by compensating voltage drops.
"2 * Ifthere is electrical noise, connect the frame gioufid
terminal (FG) with the ground terminal.
. '3 : Connect the ground terminal on the FX-PAD-PTunit
with the grounded terminal on the base unit. Use
class
3 grounding on the base unit,if grounding IS
possible.
'4 : Either an externalor the 24V built-In supply inthe
programmable controller may be used.
For additional dataregarding EMC consideratlons
please see section
7.0.
I fortheerrorchannel
b 1 : ReservedReserved 1 Reserved I
Conversion
Characteristics
Oillal
output
-1480
I b2 : Powersource I DC24Vpowersupplyfallure j power supplyncrma! I
b 3 : Hardware error AJD converter or
other hardware failure Hardware normal
I
lb4tob9 :Reserved I ReservedReserved E
~~ ~
b10 : Digltal range error Digital output/analog input valueis outslde
the speclfied range. Digltal output value
IS normal.
Selected number of averaged results is
bl1
: Averaging error
Reserved
i
Reserved
b12to b15
: Reserved and #2.
outslde the available range -see BFM #1
Averaging is normal.
(between 1and 4096)

E! I1
SYSTEM BLOCK DIAGRAM
POWER LED
i FX-2AD-PT Analog Blocs . .. .. . .. . . .. . .. .. . . ... ... .......... .. .... .. .... . . . . . . . .
EXAMPLE PROGRAM
Inthe program shown below, the FX-LAD-PT block occupies the position of speclalblocknumber2 (thatis
the thlrd closest block to the programmable controller). The averaging amountisfour. The averaged valuesin
degreesC of input channelsCHI and CH2 are stored respectivelyin data registersDO and Dl.
Block No.2 BFM#30 -, (D2)
K1 1 ldentifi catlon code
1 When identification codeis K2020, M1 = ON
When (K2020) = (D2), M1 = ON. i.e.
This initial step checks that the special function block placedat
positlon 2
IS actuallyan FX-2AD-PT, i.e. its unit identlfication
number is2020 (BFM #30). This step
is optional, but it providesa
software check that the system has been configured correctly.
!\g K2 K29 K4M10K1 ] Transfertheerrorstatus to (M25 to M10).
Block No.2 BFM#29 -. (K4M10)
When errorisfound, M10
= ON.
RepresentsbO BFM #29
~ monltor M 10
This step provides optional monitoring ofthe FX-2AD-PT Error
Buffer Memory (#29).
If there isan Error on the FX-2AD-PT, bitbO
of BFM #29
will be set on. This can be readby this program Step,
and output asa bitdevice inthe FX programmable controller
(M3
In thls example). Additional Error devices can be outputin asimilar
manner,
i.e. b10 BFM #29. (see below)
rc-7 K2 K29 K4M10K1 ]
I a RepresentsbO BFM#29
I a Representsb10BFM #29
(K4) -. (BFM#l),(K4) -. (BFM #2)
K1 K4 K2] Numberofsamples IS changedtofouronbothCH1
and CH2.
(BFM #5)
-, (DO), (BFM #60) -. (Dl)
K5 DO K2 ] Transfertheaveragedtemperaturevalue in ‘c to the
data registers.
Thls stepis the actual reading of the FX-2AD-PT input channels.
It isessenttally the only program step whichisneeded. The “TO”
instruction In this example, sets the input channels, CH1 and CH2,
to take the average readlng of four samples.
The “FROM” instruction reads the average temperatures (BMF
#5 and #6) for input channels CH1 and CH2 of the FX-2AD-PT.If
dwect temperature readlngs are required BFM
#9 and #lo should
be read instead, ex.
FNC78
K2 KQ DO K2 ]
speciar FX-PAD-PT resUn NO of
blodtNo2 BFMnumbec CleslhmUon WMdSread
B I1
DIAGNOSTICS 11
6.1 Prellmlnarvchecks
I . Check whether the inpuVoutput wirtng and/or extension cables areproperly connected on FX-2AD-PT
II . Check that the FX system configuration rules have not been broken,1.e. the number of speclal functlon
111. Ensure that the correct operating range has been selected for the applicatlon.
IV .Check that there IS no power overload onslther the 5V or 24V power sources, remember the loading on
an MPU or a powered extenslon unit vanes according
to the number of extension blocks or special
function blocks connected.
analog special function block.
blocks doesnotexceed
8 and the total system I10 IS equal or less than 256, I/O.
V. Put the Main Processing Unlt (MPU) into RUN.
6.2 Errorchecklna
If the FX-2AD-PT specialfunction block does not seem to operate normally, checkthe followlng items.
0 Check the status ofthe POWER LED.
Llt : Theextensioncableisproperlyconnected.
Otherwise : Check the connection of the extension cable.
0 Check the external wiring.
0 Check the status of the “24V” LED (top rlght corner of the FXQAD-PT).
Lit : FX-PAD-PTis ON, 24VDCpowersource IS ON.
Otherwise
: Possible 24V DC power failure, If ON possible FX-2AD-PT failure.
0 Check the status of the “A-D” LED (top right corner of the FX-PAD-PT).
Llt : A-D conversion IS proceedlngnormally.
Otherwise : Check buffermemory #29 (error status). If any blts (bo, b2, b3) are ON, then thls IS why
the A-D LEDis OFF.
6.3 Checklnaspeclalfunctlonblocknumbers
Other speclal units or blocks that use FROM0 commands, suchas analog input blocks, analog output
blocks and high-speed counter blocks, canbedirectly connected
to the base unitof the FX programmable
controller or to the rlght side
of other extension blocks or units. Each special blockisconsecutively numbered
from
0 to 7 beginning from the one closest to the base unlt. A maxlmum of eight speclal blockscan be
connected.
I1
EMC CONSIDERATIONS
1
Electromagnetic compatibility or EMC must be considered before using the FX-PAD-PT.
Mltsubishi recommendthat thePT 100 sensors used, should befittedwith a formof shield or screenlng as
protection against EMC noise.
If some form of cable protection is used, the “Shield” must be terminated at the E] terminals as shown
insection 2.0.
Because of the dellcate nature ofallanalog signals, failure
to take good EMC precautlons could lead to EMC
nowinduced errors
; up to f 10% of actual values. ThisIS an absolute worst case flgure, users who do take
Guldellnes for the safoty of the user and ~rotoctlon of
the FX-PAD-PT speclrl functlonblock
0 This manual has beenwritten to be used bytrained and competent personnel. This is defined
by the European directlvesfor machinery, low voltage and EMC.
0 If indoubt at any stage durrng the Installation of the FX-PAD-PT always consult a professlonal
electrical engineerwho IS quallfiedandtrained
to the local and natlonal standards. If In doubt
about the operatton
or use of the FX-2AD-PT please consult the nearest Mttsubishi Electric
distributor.
Under on clrcumstances will Mltsubishl Electric be liable or responslble for any consequential
damage that may arlse asa result of the installation oruse of this equipment.
0 All examples and diagrams shownInthis manual are Intended only as an atd to understandtng
the text, not
to guarantee operation. Mitsubishi Electric will accept no responslbility for actual
use of the product basedon these illustrative examples.
I I
Manual number : JY992D55701
Manual revision
: A
Date : March 1996
A
goodprecautionscanexpectoperatlonwithinnormaltolerances. A MITSUBISHI ELECTRIC CORPORATION
EMCconsiderationsshouldincludeselectionofgoodqualltycables,goodroutlngofthosecablesawayfrom HEAD OFFICE MlTSUBlSHl ENKl @LEG WRUNWCH TOKYO (W ELEX ZWW TOKYO
potential nolse sources.
Additionally It
IS recommended that signal averaging IS used as this will reduce the effects of random noise
“spikes” .
HIMWI WORKS edo CnlYODA CY0 HIMEJI. JAPAN
EffectiveMAR. 1996
Spectficatlons aresubject
to
change without notlce.
JY992D55701 A