Answer / divya

Please note Function and Function Block both are subroutine
in case of s7-300 & 400. Whenever you are writing
structured program you make use of them.

The basic difference between them is Fuction(FC) don't
require addition memory block they can exist on their own.

Whereas Function Block(FB) compulsorialy require a memory
dedicated to it called as Data Block(DB). This data block
is called as Instance Data block as only that particulcar
FB can use it.

Function Block is used when after each call operation in
initial /input value needs to be changed.

Answer / william lobo

support.automation.siemens.com

you may approach them for your answer if it is related to
specific equipment used by yourself.

vi S7 Standard Functions Part 2 C79000-G7076-C113-02 The
following functions and function blocks are described in
this manual:
Function or Function Block
Number
Page
oftware Timer On Delay—Retentive (TONR) FC80 5-2 Indirect
Block Move (IBLKMOV) FC81 4-2 Reset Range of Outputs (RSET)
FC82 1-2 Set Range of Outputs (SET) FC83 1-6 Add to Table
(ATT) FC84 2-2 First In/First Out Unload Table (FIFO) FC85
2-4 Table Find (TBL_FIND) FC86 2-6 Last In/First Out Unload
Table (LIFO) FC87 2-9 Table (TBL) FC88 2-11 Move Table to
Word (TBL_WRD) FC89 2-13 Word Shift Register (WSR) FC90 3-2
Word to Table (WRD_TBL) FC91 2-15 Bit Shift Register (SHRB)
FC92 3-4 Seven Segment Decoder (SEG) FC93 6-2 ASCII to Hex
(ATH) FC94 6-4 Hex to ASCII (HTA) FC95 6-6 Encode Binary
Position (ENCO) FC96 6-8 Decode Binary Position (DECO) FC97
6-9 Ten’s Complement (BCDCPL) FC98 6-10 Sum Number of Bits
(BITSUM) FC99 6-11 Reset Range of Immediate Outputs (RSETI)
FC100 1-4 Set Range of Immediate Outputs (SETI) FC101 1-8
Standard Deviation (DEV) FC102 7-2 Correlated Data Table
(CDT) FC103 2-18 Table to Table (TBL_TBL) FC104 2-21
Scaling Values (SCALE) FC105 6-12 Unscaling Values
(UNSCALE) FC106 6-14 Lead/Lag Algorithm (LEAD_LAG) FB80 6-
16 Discrete Control Alarm Timer (DCAT) FB81 5-4 Motor
Control Alarm Timer (MCAT) FB82 5-7 Index Matrix Compare
(IMC) FB83 8-2 Scan Matrix Compare (SMC) FB84 8-6 Event
Maskable Drum (DRUM) FB85 5-10 Pack Data (PACK) FB86 4-4

why we use to transmit the power in three phases intead of single phase ?

5 Answers  

---

wat s the electronic device used in the fan regulators recently?

2 Answers  

---

Two electric lamps 40 W, 220 V each are connected in series across 220 V. What is the power consumed by the connection?

0 Answers  

---

HT/LT PANEL TEST?ALL TEST

0 Answers  

---

Active power= VI COS FI But incase of leading power factor ( more than unity), may we use other formula ? because the cos fi (value of cos thita) should not be grater than one.

2 Answers  

---

in india why the generating voltage is like 11kv,22kv etc

1 Answers   Alstom, Ford,

---

Do you know how to measure the earth resistance?

7 Answers   Manhattan,

---

what are the current specifications of bus ducts ? i ve seen in IPBD bth 22000 A and 1500 A in 400 kv switchyard . why it is so??

1 Answers  

---

what is eddy current loss?

3 Answers  

---

If a motor of 8.5 KW with same load and using in both Star & Delta one by one,then which will take more current in star connected or in delta connected

4 Answers  

---

We have 3 Gensets 1.500kva,2.380kva,3.250kva How can we connect in common busbar&we have variable load.

4 Answers  

---

differentiate between one way two gang switch & two way one gang switch, used in designing the loads of building.

1 Answers  

---