THOMSON Omnidrive Series Installation Manual page 82

Multiple Axes Four-Wire RS-485 Communications
Do not connect any device to J5-6 or J5-9 except an Thomson Industries
TIP
TouchPad.
1. Select a previously unused address (1-32) from OMNI LINK - Drive Set Up.
2. Connect cables between:
• The host computer and the serial port on the initial drive (J5) in the multiple drive configura-
tion.
• The other serial port on the initial drive (J5) and the serial port on the next drive (J5) in the
multiple drive configuration
Flat ribbon cable is not recommended for RS-485 connections.
TIP
3. Verify the communication settings on the computer are correct:
• Start OMNI LINK on the attached PC
• Choose CANCEL from the Drive Select window
• Select Communications from the menu
• Select PC Set Up from the pull down menu.
• Verify the port settings, and if necessary, change them, then choose OK.
Address 0 is the preferred address for the initial configuration of a drive. It forces
TIP
the drive to the default communications parameters.
4. Verify the ability to communicate between the computer and the connected drives by:
• Switch drive power to ON
• Select Communications from the menu
• Select Read Drive Parameters from the pull down menu
• Select the drive to communicate with from Drive Select window (the drive must have an
address that matches one of the drive addresses in the chain)
• Choose OK in the Drive Select window.
5. Verify that OMNI LINK loads the drive parameters. If not, refer to the troubleshooting section.
6. Repeat the preceding two steps for each additional drive.
Four wire RS-485 connections are shown below. The cable diagram provides a wiring example of a daisy
chain connection in a typical installation A multi-drop cable (Figure 6.41) may also be used.
Multiple Axes RS-232 Communications
Multiple axes systems may be controlled by a computer with an RS-232 serial port. An RS-232 serial
communication port may be converted to four wire RS-485 communication by attaching an RS-232 to
four wire RS-485 converter. The figure below depicts the use of such a device.
Installation Manual for Models ODM-005, ODM-005i, ODM-010, ODM-010i, ODM-020 and ODM-020i
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Interfaces 6-31