Black Box GEH-6510 manual Configuring Communication ports

Configuring Communication ports

NOTE: If your host is running on an Ethernet (TCP/IP) platform, see the Ethernet

Users Only note at the end of this section.

The software (Modbus version) supports up to 256 RS-485 ports. The number actually supported by your hardware depends on your RS-485 interface – see GEH- 6502, POWER LEADER Network Architecture Guide, for details. We refer to these communication ports as “comm ports” in the documentation.

NOTE: The 256 ports supported by the Modbus version of the PMCS DDE Server are automatically assigned to logical ports 1 through 256. Other configurations, such as 3 through 8 are not allowed. It is therefore necessary to disable COM1 and COM2 in the host PC’s CMOS setup (typically assigned to RS-232 ports) in order to assign COM1 and COM2 to RS-485 ports. Do not disable COM1 and COM2 if using an external RS-232/RS-485 converter box (such as the Multilin interface converter).

For this example, we’ll assume that the RS-485 interface is an eight-port RS-485 card. If your situation is different, follow the example and adjust your procedures accordingly.

Step 1. Click on the Configure pull-down menu and select Configure.

Now you should be looking at the Configuration dialog box, with several options.

14 • Chapter Three - Getting Started DDE Server User’s Guide