Diagnostics and messages
8.1 Diagnostics and messages
3RW44 soft starters
146 Manual, 03/2017, NEB535219502000/RS-AB/008
No external starting parameters
received (devices with product
version ≥ *E06*)
x Occurs only during operation with PROFIBUS DP. Incorrect or
impermissible parameter values have been sent by the PLC.
Remedy: The Soft Starter ES software can be used to read the
incorrect parameter and to change it to a permissible value.
PIO error (devices with product
version ≥ *E06*)
x PIO error (faulty process image of the outputs) appears
• If Motor CW and Motor CCW have been selected simultaneously
(cause 1) or
• If Parameter set 4 has been selected via the PLC (cause 2).
• Automatically reset if Motor CW and Motor CCW are deactivated
again (in response to cause 1) or
• If a valid parameter set (PS 1 - 3) is set again (in response to
cause 2).
Bypass element protective tripping
(devices with product version
≥ *E07*)
x A very high current occurs in bypass mode. The tripping operation
depends on the duration of the current and strength of the current.
Fault can only be reset after 30 s (for cooling down).
Remedy: Check the motor and check soft starter dimensioning.
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