I have an SLC 5/04 (a 541 with 1747-OS401 SER C FRN 10) that after a minute of being powered up has only a solid FLT LED lit.
The order of event are:
1) Apply Power
2) FLT light flashes once
3) All LEDS flash once
4) FLT light flashes (as does BATT if I disconnect the battery)
5) After about 15-30 seconds all LEDs flash
6) FLT light flashes once
7) All LEDs flash
8) FLT light stays solid
I've tried shorting the GND and VBB pads on the back of the PLC with the battery disconnected, but no matter what I do the exact same thing happens every time, I'm unable to see it under RS Linx Classic, changing the key switch position does nothing, Autoconfig does not work in RS Linx when configuring the RS232 driver.
Any ideas on what I might be missing? I'm beginning to think that someone prior to me getting the unit messed up a firmware install, but I don't want to purchase a firmware upgrade kit on the remote chance that would resolve my issue. Is there a rental or borrow program where I could obtain, at least temporarily, the upgrade kit? Or a service where I could mail the 5/04 to where they would preform the upgrade and mail it back?
The order of event are:
1) Apply Power
2) FLT light flashes once
3) All LEDS flash once
4) FLT light flashes (as does BATT if I disconnect the battery)
5) After about 15-30 seconds all LEDs flash
6) FLT light flashes once
7) All LEDs flash
8) FLT light stays solid
I've tried shorting the GND and VBB pads on the back of the PLC with the battery disconnected, but no matter what I do the exact same thing happens every time, I'm unable to see it under RS Linx Classic, changing the key switch position does nothing, Autoconfig does not work in RS Linx when configuring the RS232 driver.
Any ideas on what I might be missing? I'm beginning to think that someone prior to me getting the unit messed up a firmware install, but I don't want to purchase a firmware upgrade kit on the remote chance that would resolve my issue. Is there a rental or borrow program where I could obtain, at least temporarily, the upgrade kit? Or a service where I could mail the 5/04 to where they would preform the upgrade and mail it back?