Abb power module 3BHB017688R0001 IPS 21-35 AD

Description

The DCS frequency 3BHB017688R0001 does not respond to the given frequency converter

Fault phenomenon:
(1) The remote DCS sets a certain frequency, and the touch screen of the frequency converter will not adjust the speed after receiving the frequency.
Failure cause:
When the PLC judges that the system is in the “remote control” mode, the 3BHB017688R0001 master control can receive the remote 4~20ma signal for frequency regulation. Therefore, the main reasons for the non speed regulation of DCS given frequency system are: 1) The control mode (function No. 207) accepted by the master control is incorrect; 2) The frequency setting mode (function No. 208) under the panel control mode is incorrect
resolvent:
(1) Turn the knob on the control cabinet door to make the function number 207 1, that is, remote control mode.
(2) Select the frequency setting mode under panel control mode, and the function number is 1, that is, analog input AI frequency setting.
Please close the question “High voltage”
3BHB017688R0001 Fault phenomenon:
(1) The inverter changes from the “system ready” state to the “please switch on high voltage” state, and the process change delay is only set for 60s. After the high voltage is disconnected for 60s, the “please switch on high voltage” is uploaded to DCS, and the operator switches on the high voltage again, resulting in the burning of 16 module fuses.
(2) Since the user refused to introduce the “please switch on the high voltage” status of the frequency converter to the DCS system, after the high voltage of the frequency converter was cut off due to other equipment faults, the operator did not switch on the high voltage after a delay of 300s according to the regulations, but quickly switched on the high-voltage switch of the frequency converter, resulting in the burning of 16 module fuses.
Failure cause:
Since the power inside the capacitor in the module cannot be discharged immediately after the high-voltage power failure of the inverter, a certain period of time is required. At this time, the high-voltage is switched on again, causing a short circuit and burning the fuse.
resolvent:
(1) Set the time from “System Ready” to “Please Switch on High Voltage” to 300S.
(2) During on-site installation and commissioning, the “please switch on high voltage” signal must be connected to the user’s DCS system, and the thermal engineer must do a good job of interlocking protection in the switch on circuit.

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