Issue
When using a USB to RS-232 adapter and an MN-CIM, cannot connect to MicroNet 2000 controllers. Receive an ERROR = -510.
The problem has also been seen on laptops with an integral serial port.
Environment
Laptop computer running the MN-CI or MN-FLO-BAL software tools, any version
MN-CIM Controller interface Module
Cause
One cause of ERROR = -510 is that the serial port or USB to RS-232 adapter does not supply enough power to the "port-powered" MN-CIM.
When the CI software is running, but not communicating on the U-LINK, it requires only 12 mA at 5 VDC.
To communicate on the U-LINK, the MN-CIM requires 14 mA at 5 VDC from the DTR control line of the port.
Some computers have a mechanism to sense the increased current draw and shut down the DTR line. This loss of power causes the MN-CIM to reset, and after 3 attempts to communicate the MN-CI software issues the ERROR= -510 message.
Resolution
See Technical Bulletin 01-104 for information on the Patton Electronics power supply adapter, model 3PMF9-BC.
