Siemens SIMATIC NET Betriebsanweisung PDF herunterladen (Seite 58)

54 Wonderware Siemens SIMATIC NET S7 I/O Server

2. If you are running Windows for Workgroups (version 3.1 or later), download

SERIAL.386 (this fixes a Microsoft bug) from the Wonderware Bulletin Board

system (949-727-0726) or from the Wonderware WEB site at:

http://wondertech.wonderware.com.

8 The size of this file is 10620 bytes, has a date of 2/17/94, and is a self-

extracting zip file called wg1001.exe. It’s located in the "PatchFix Library" on

the Wonderware BBS in the File Transfers / Patchfix area.

8 You must be registered to access the Wonderware Web site.

3. If the above numbers, 1. and 2., do not work, verify the value of the ComBoostTime

parameter in your SYSTEM.INI file. This parameter represents the number of

milliseconds a virtual machine processes a COM interrupt. (The default value is 2.)

It is not recommended that you change this setting. However, if you are receiving

errors such as "Receive Overruns" or "WCRE=-2", try increasing the value to 20.

Ø Verify the parameters for WWCOMTSR.

Do not specify a receive and/or transmit buffer size of 8!

For example:

Correct:

COM1:0 COM2:1,2048,2048

COM1:0 COM2:1

Incorrect:

COM1:0 COM2:1,8,8

Ø Does your computer crash when trying to communicate through the COM port?

If so, verify that each TSR has a unique software interrupt.

8 A utility, ShowSoft, is available on the Knowledge Base CD that can assist in

determining the available software interrupts.

Ø Does your computer lock up?

Verify the COM port's IRQ’s do not conflict with each other or with other

communication boards in the computer.

Ø If the PLC or field device has more than one COM port, verify the connection to

the correct port.

The COM port on your computer uses the RS-232 hardware communication standard

and connects the cable from the COM port to an RS-232 compliant device.

Note To connect to an RS-422 or RS-485 port on the PLC, you need an RS-232 to RS-

422/485 conversion device.

If possible, use an external converter instead of a board-based converter that plugs into a

slot in the computer. A board-based converter is difficult to get working for

inexperienced users. If a board-based converter is not set up properly, it can conflict

with other communication boards in the computer such as, internal modems.

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Siemens SIMATIC NET Betriebsanweisung Seite 58