COM PortCOM PORTThe Programmer software communicates with the encoder through the encoder IR port using the IR programming and dataprofile cable (IR cable) You must identify the correct communication (COM) port for the IR cable to make sure the softwarecan communicate with the encoder Follow these steps to identify the correct COM port for the IR cable connected tothe computer1 Connect the IR cable to the serial port of the computer If the computer does not have a serial port, use aserial-to-USB adapterFollow these instructions to identify the COM port:• Select the Microsoft Start button• Right-click on Computer*• Select Manage• Select Device Manager from the menuon the left• In the Device Manager window, clickthe arrow next to Ports (COM & LPT) toexpand the selection• Find the COM port for the IR cable Theexample (Figure 36) shows COM 7 forthe IR cable connected with a USB toserial adapter, “Prolific USB-to-SerialComm Port “2 Write down the COM port number for usewith the Programmer software Figure 36: COM port in Device Manager window* If you have Windows 8 or 10, type “Device Manager“ in the Search field to open the Device Manager screenTROUBLESHOOTINGIssue Probable Cause SolutionProgrammer screen is blank aftera ReadCOM port not specified Select the correct COM port from the IRPort drop-down menuBad connection Check for damaged or broken wiresError message displayed after clickingan option on the programmer screen IR head not aligned with the device Align the head of the IR cable with theIR port on the device and try againEncoder alarmWhile in regular operational mode,the device is tilted or removed fromthe meterAlign the head of the IR cable withthe IR port on the device Keep thedevice stillAlso see "Read Errors" on page 8Page 22 May 2018ENC-PM-02040-EN-03