
APrev (Customer) asked a question.
I installed a SV2A-2040 with SV2-CM-ENETIP com module, with an implicit ethernet/ip connection to an Allen Bradley CompactLogix 5380 series PLC.
I have the servo controller operating in PR mode, and I have defined several paths. PR#00 is set up, as well as PR#01, 05, 06, 07, 09, and 11. I set up paths 0, 1, 9 and 11 a few days prior to setting up paths 5, 6, and 7.
I have been controlling the servo by calculating required absolute position on the PLC, and then modifying P6.011, P6.013, and P6.015 to change the target position for PR#05, 6, and 7 respectively. I haven't actually used P6.011 to modify path 5, but I wanted the option so I included it in the EDS file and set up path 5 as well.
I set up the paths in the SureServo2 software, and wrote them all to the drive, and everything works as intended until I turn off power. When I power cycle the drive, it loses paths 5, 6 and 7, but keeps the others (0,1, 9, and 11)
I've saved the paths to a file that I can load up and write to the servo using the write to servo button on top of the PR window. See "1" on picture.
I have re-made each path and saved them using the "write all paths to drive" button, "2" on the picture.
I have re-made each path and saved them individually using the "write this path to drive" button, "3"
Still, when I power cycle the drive, reconnect, and read from the servo (the read button in circle "1"), paths 5, 6, and 7 disappear, but the others remain.
How do I keep the servo controller from deleting paths 5, 6, and 7 on a loss of power?
Page 409 of the user manual discusses parameter 2.30 this controls the writing to the EEPROM: