Remote operation
7.1 Operating via SIMATIC PDM
SITRANS LR250 with mA/HART
Operating Instructions, 10/2019, A5E32220602-AG
71
7.1.2.1 Deactivating buffers
This deactivation is required to align SIMATIC PDM with the HART modem for Windows
2000
®
and Windows
®
XP operating Systems. Windows
®
is a registered trademark of the
Microsoft Corporation.
This deactivation is only necessary when you're connecting via RS232 (COM1) as
opposed to USB.
You will need administrative rights on your operating system to deactivate buffers.
SIMATIC PDM operates only in the Windows XP Professional version, not in the Home
version.
1. Click Start/Settings/Control Panel to begin configuration.
2. Double click System, select the Hardware tab, and click the Device Manager button.
3. Open Ports folder and double click the COM Port used by the system to open the
Communications Port Properties window.
4. Select the Port Settings tab and double click the Advanced button.
5. If the Use FIFO buffers radio box is selected, click to deselect.
Deselect Use FIFO buffers radio box
6. Click OK to close out. Close all screens and then reboot.
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