FAQ

1. Which software is used for programming of S7-200 SMART PLC?

 ANS :- Simatic Step7-MicroWin SMART

2. How many expansion modules can be connected to S7-200 SMART PLC?

 ANS:- All S7 200 SMART Standard type CPUs can be expanded with 6 Expansion Module and 1 Signal Board.

3. Is Modbus RTU protocol supported in S7-200 SMART PLC?

 ANS:- Yes, 
  All CPUs supports Modbus RTU through on board RS 485 Port and standard type CPUs can be expanded with one Optional signal board(Communication board). Each of this port can be individually configured as master or slave.

4. What is the maximum possible I/O configuration in S7-200 SMART PLC?

Type

CR40

CR60

ST20

ST30

ST40

ST60

SR20

SR30

SR40

SR60

Maximum Digital I/O handling capacity*

40

60

212

222

232

252

212

222

232

252

Maximum Analog I/O handling capacity*

-

-

36

36

36

36

36

36

36

36

*The maximum I/O handling capacity is considering I/O expansion with Signal boards.

*Power budget needs to be considered while doing actual configuration.

5. Does S7-200 SMART PLC support Modbus TCP/IP protocol?

 ANS:- NO, 
S7 200 SMART PLC has on board Ethernet port which can be used for program upload download, communication with Simatic HMI, other S7 PLCs & Win-CC SCADA.

6. What is the maximum holding time of RTC in S7-200 SMART PLC in power off condition?

 ANS:- S7 200 SMART CPU has Super capacitor Inside which provide Approximately  7 days backup for RTC when CPU is in power Off condition.

7. What is the maximum holding time of RTC in S7-200 SMART PLC in power off condition with optional battery board?

ANS:- Battery board (MLFB6ES72885BA010AA0) is used for adding external battery to S7 200 SMART PLC. This signal board supports CR1025 button batteries, with CR1025 button Cell it provide RTC Holding time up to 1 Year in power off condition.

8.  How many HSC and PTO can be configured in S7-200 SMART and frequency?

 ANS:- S7 200 SMART PLC has maximum 4 HSC of  200KHZ each.
 S7 200 SMART PLC has maximum 3 PTO of 100KHZ each 
 Both can be configured through Wizard setup in Step7 MicroWin SMART.

Type

CR40

CR60

ST20

ST30

ST40

ST60

SR20

SR30

SR40

SR60

High speed counter (HSC)

4 at 100 kHz for single phase

4 at 100 kHz for single phase

4 at 200 kHz for single phase

4 at 200 kHz for single phase

4 at 200 kHz for single phase

4 at 200 kHz for single phase

4 at 200 kHz for single phase

4 at 200 kHz for single phase

4 at 200 kHz for single phase

4 at 200 kHz for single phase

High speed pulse output (PTO)

-

-

2 at
100 kHz

3 at 100 kHz

3 at 100 kHz

3 at 100 kHz

-

-

-

-

9. How to communicate two S7-200 SMART PLCs using onboard Ethernet port?

  ANS:- Step7-MicroWin SMART software has GETPUT function block which allows CPU to CPU communication using on board Ethernet. Maximum eight connections are possible with one CPU.

10. Maximum how many S7-200 SMART PLCs can be put in a network using GETPUT?

 ANS:- One S7 200 SMART CUP can be configured with maximum 8 other S7 CPU.
This is also applicable with all 8 CPU connected in same network.

11. Does S7-200 SMART PLC support USS protocol for Sinamics VFD communication?

 ANS:- Yes, 
  Each CPU has one onboard RS485 port which support USS and one Optional signal board which can be configure for USS communication. Each of this port can be individually configured as master or slave.

12. Can S7 200 SMART communicate With SCADA?

 ANS :- YES,

 S7 200 SMART PLC has one onboard Ethernet port and RS485 port it also supports one optional communication board which can configured for RS232 or RS484 Communication. So S7 200 SMART PLC can communicate with SCADA by following ways.
Ethernet Port :- i) Direct communication with SCADA which has S7 200 Driver.

                          ii) communication on OPC platform using PC Access SMART software.
Serial Port :-     i)Modbus RTU communication

                          ii) Free port communication (RS232)

13. Does Smart PLC support web server functionality?

 ANS :- NO.

14. What is PC access smart software?

 ANS:- This is Software platform which allows OPC communication between S7-200 SMART PLC and third party software which supports OPC communication.
For e.g. Visual Basic, dot net, Microsoft Excel etc.

15. Does Smart PLC support data logging?

 ANS:- Yes, ALL S7 200 SMART CPU has separate 8 MB internal memory space only for Data logging, log file is available in .csv format and can be extracted using Step 7 MicroWin SMART software.

16. What is the data logging capacity of SMART PLC?

  ANS :- 8 MB, ALL S7 200 SMART CPU has special 8 MB internal memory space for Data logging, log file is available in .csv format and can be extracted using Step 7 MicroWin SMART software.  One can create Maximum 4 Files of 2 MB Each with real time Date and time stamp

17.What is the use of MicroSDHC card in S7 200 SMART PLC?

ANS :- any standard, commercial microSDHC card with a capacity in the range 4GB to             16GB can be used in S7 200 SMART PLC. MicroSDHC card is used for following purpose. 

a.        Program Transfer

A memory card can be used to transfer user program content into the CPU's permanent memory, completely or partially replacing content

already in the load memory. And for duplication of program from one CPU to other CPUs.

b.      Firmware upgrade.

A memory card can be used to update the firmware in a CPU and any connected expansion modules.

c.       Restore factory settings.

A memory card can be used to erase all retained data, putting the CPU back into a factory default condition.

18. Does program gets erased if PLC is kept in power off condition for more than 7 days?

 ANS :- NO,
 The program resides in permanent memory and does not require battery backup even if the super capacitor gets discharged after 7 days of power off condition.

19. When Battery Board is required in S7-200 SMART PLC.

 ANS :- S7-200 SMART PLC required Battery Board at following condition.

a.       To increase RTC Holding Time in case of CPU (Machine) is in power off condition for more than 7 days.

20. What will happen if Battery board is not installed in case S7-200 SMART PLC is in power off mode for more than 7 days?

ANS: - If S7-200 SMART CPU is kept in switch-off condition for more than 7 days only RTC gets reset to its factory settings.

21.  How to upgrade firmware using memory card

ANS:- For updating S7 200 SMART CPU firmware follow below steps.

      i.        Copy firmware file of desired CPU in any 4 GB to 16 GB microHDSC card.

     ii.        Place the CPU in STOP mode.

    iii.        Insert memory card into CPU memory card slot.

   iv.        Turn on power,

    v.        Give power cycle, now CPU will start Firmware update procedure automatically

   vi.        When CPU LED lights stops flashing, turnoff CPU and remove memory card for the slot.

  vii.        CPU firm ware is updated successfully.