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Simovert VC 6SE7021-8EB21-Z No RS-485 communication repair

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Revision as of 11:00, 17 July 2024 by ASRepairs (talk | contribs) (Created page with "{{stub}} {{Repair Guide |Device= |Affects parts= |Needs equipment= |Type= |Difficulty= }} ==Problem description== <!-- Provide a concise description of the issue here. Be as specific as possible to help readers quickly determine whether or not this is the exact problem they are facing. --> Fixing an issue with this Siemens Simovert VC inverter where there is no communication on RS-485. thumb|ICs to change with marking (Figure 1) ==Sympt...")
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Simovert VC 6SE7021-8EB21-Z No RS-485 communication repair
Device
Affects part(s)
Needs equipment
Difficulty
Type


Problem description

Fixing an issue with this Siemens Simovert VC inverter where there is no communication on RS-485.

ICs to change with marking (Figure 1)

Symptoms

  • No RS communication otherwise works fine

Solution

Make sure the port itself is not damaged. If it's okay, check the cable connecting the front panel to the CPU board. If that's also good then replace the 2 ICs marked on figure 1. In this case, replacing both fixed it.

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