Allow pr2_etherCAT to operate even when devices with unrecognized product codes are present (ros ticket #5009)

[ahendrix]

Because pr2_etherCAT now supports a wider variety of devices, it possible a device is installed on a robot whose ethercat_hardware plugin is not part of the normal PR2 ROS install. Thus, for users without a special ROS overlay, the robot would become unmovable.

It may be a better to allow pr2_etherCAT to come up with generic driver for unrecognized device. The generic driver would provide diagnostic warnings and information about unknown device.

trac data:

• Owner: wheeler
• Reporter: dking
• Reported at: Tue Feb 8 20:48:05 2011
• URL: https://code.ros.org/trac/wg-ros-pkg/ticket/5009