Using ELSA MicroLink 56k FUN Modem for Teleservice With SIMATIC S7-200 Www.otomasyonegitimi.com

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QUESTION:Which entries are necessary for STEP7 Micro/WIN V3 to use the ELSA MicroLink 56k FUN modemfor Teleservice?

ANSWER:You want to use an ELSA MicroLink 56K FUN modem for Teleservice with SIMATIC S7-200.For this you need the following hardware:

l SIMATIC S7-200 CPU22xl PC/PPI cable (10/11-bit) with MLFB 6ES7 901-3BF20-0XA0l 9-pin gender changer with pins on both sides, available in computer specialist storesl 2 ELSA MicroLink 56k FUN modem (firmware V1.01), available in computer specialist stores

The following settings must be made in STEP 7 Micro/Win V3:

1. You open STEP 7 Micro/Win and then the communications window STEP 7 Micro/WIN V3.Then select the Properties for the PC/PPI cable. Under "Local Connection" activate the"Modem connection" box.

2. Here the following communications settings are necessary:

3. Acknowledge with "OK" and the following window opens:

PC/PPI cable Baud rate: 9600Switch 4 ON (10-bit)Switch 5 ON (DTE)

STEP7 Micro/WIN V3 Modem connection (Local Connection)Baud rate 9600 (PPI)

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4. Select the local (upper) modem with a double-click.5. Click the "Add..." button.

6. Enter a name for the connection and close the dialog with "OK".





7. Now click "Configure..." and make the following entries:

8. Complete the input with "OK" and select the 10-bit communications mode.9. Terminate with "OK".

Since the AT command for saving the initialization has to be sent separately, you have to dothis either with Hyperterminal or through the entries for the remote (lower) modem.

Proceed as follows:

1. Double-click the remote (lower) modem and from the drop-down menu select the name enteredpreviously for the connection (last entry).





2. Select "Configure..." and make the following entries:

3. Complete your entries with "OK".4. Now the following additional entries are included in STEP7 Micro/Win V3 for a modem

connection:

l Under "local" (upper) modem there are all the initialization commands required for both thelocal and the remote modem.

l Under "remote" (lower) modem there is the statement for saving the initialization in the modemso that it can be reloaded again automatically after a power failure.





Set up a connection from the modem to a SIMATIC S7-200 by working through the followingsteps:

1. Start STEP 7 Micro/WIN V3 and in the "Communications" window select the PC/PPI cable ascommunications hardware.

2. Open the Properties for the PC/PPI cable and check or make the following settings:

3. In the ensuing window click the local (upper) modem.4. In the drop-down menu select the connection names for the modem.5. Click the "Configure..." function.6. Connect the local modem.7. Select the "Program/Test" function to transfer the initialization statements to the modem.8. The return message "Successful" must be displayed.9. Complete initialization with "OK".

10. Check or select the 10-bit communications mode and acknowledge with "OK".11. Select the remote (lower) modem.12. Select the "Configure..." function and with "Program/Test" transfer the command for saving

the initialization to the modem.13. The return message "Successful" must be displayed.

Now all the necessary settings have been made on the ELSA MicroLink 56k FUN modem for it to beable to be used for Teleservice with a SIMATIC S7-200.

You must proceed in exactly the same way for the second modem.

Note:The procedure described is different from that described in the SIMATIC S7-200 system manual. Thetwo entries for the local and remote modems are not used separately in this procedure. Since thecommand for saving the initialization has to be sent separately to the modem, it is the simplestsolution.

Description of the initialization:

Prefix:

Hang up:

PPI Baud rate 9600

Local Connection Activate "Modem connection"

COM Port Select the port to which the modem isconnected

AT&F Reset to default settings

ATE0 Suppress echo from modem

ATQ0 Return messages from modem on

AT&D0 Ignore DTR status change

ATX3 Ignore dial tone; evaluate busy tone

ATS0=1 Lift off after first ring

AT+IFC=0,0 Local data flow control offAT&W0 Save configuration in Profile 0

ATDT Tone dialing (ATDP = pulse dialing)





Suffix:

ATH0 Command to hang up

^M RETURN

Entry ID:2854900 Date:2000-08-15

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Using ELSA MicroLink 56k FUN Modem for Teleservice With SIMATIC S7-200 Www.otomasyonegitimi.com