DC800 "oninhibit" problem

good day,

i am currently working on a DCS800 (firmware ver 3.7)
my problem is that i could not start commissioning because of the "ONINHIBIT" status of the drive. both the OFF2 and OFF3 are on normal state.
i would appreciate any information to eliminate present status and have a "RDYON"

thank you

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jossel37 Rank: 1875

Asked 5 months ago

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Hi,

You should read the Firmware manual for DCS800 - that is the first step for commissioning:

If the is a brand new drive, then look the following parameters:

- 10.08 = DI4 = off2 command = NC : 1 = no stop command / 0 = stop command active
- 10.09 = DI5 = emergency stop command = NC : 1 = no E stop command / 0 = stop E command active

So, you have to connect +24VDC to these inputs.

Or select 0= not used to 10.08 and 10.09. Or to find how to use the control word.
Be careful, NOT USED is for commissioning only, you have to ensure then that you have a correct stop command, at least for off2 command.

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by jossel37 Rank: 1875 on 10/13/2018 10:28:05 PM | Like (0) | Report

good day Mr, kstoilov,

the digital inputs are 220 VAC, bits 4 and 5 of the drive's status word is both high (both =1) and there is no other fault indicated by the drive but still i get "oninhibit"

by kstoilov AKS expert

Rank: 5 on 10/14/2018 1:56:23 AM | Like (0) | Report

Hi,
Could you please provide bit status of the status words 8.01 and 8.02

by jossel37 Rank: 1875 on 10/14/2018 4:31:27 AM | Like (0) | Report

hello,

both are "0", bits 4,5 and 6 are "1"

by jossel37 Rank: 1875 on 10/14/2018 4:46:32 AM | Like (0) | Report

sorry above conditions are for parameter 8.01 and parameter 8.02 is i think hex 1A40

by jossel37 Rank: 1875 on 10/14/2018 4:48:58 AM | Like (0) | Report

do you think reloading of firmware (ver 37) could correct this?

by kstoilov AKS expert

Rank: 5 on 10/14/2018 12:50:56 PM | Like (0) | Report

Hi,
8.02 = 1A40 = 0001 1010 0100 0000 = B6, B9, B11, B12 = 1 Nothing wrong, B9 drive is in limit
Please provide the same information for 8.01, your answer is not clear. 8.01 will provide more information for the status, if there is a fault and so on, Bits are 16, from B0 to B15, but only B0 to B10 are used.
Why do you think for firmware reloading? Is that a new drive or already used?

by jossel37 Rank: 1875 on 10/14/2018 6:38:27 PM | Like (0) | Report

good day,
drive is not used, but has been in storage for 2 years.
at the moment my computer is at site and i am now in the office, what i can remember is that value of 8.01 is 170 (hex)

as for reloading of firmware. i am assuming that since drive does not show any fault and the off2 and off3 are normal but there is still oninhibit, there might be something wrong with its present installed firmware and that reloading might solve it

by kstoilov AKS expert

Rank: 5 on 10/15/2018 3:01:35 AM | Like (0) | Report

Hi,
8.01 = 170 hex = 0001 0111 0000 = B4,B,B6,B8= 1
Than means B0=0, B1=0 - not ready to switch on, not ready to generate torque
B3=0 - no trip
B4,5=1 - off2 and off3 not active (no stop command) - correct
B6 =1 - Oninhibit = true That is the reason for not running
In summary = the drive is not ready to start. I think you should concentrate on eternal connection of control circuits, DI for the drive on-X6. These signals are 24VDC, as I explained, and should be connected in correct way so the drive is ready for operation.
Look in HW manual for examples how to connect these inputs - there are typical connection diagrams, depends on your case.
I'm pretty sure that there is some signal missing, regarding to the parameters set.
In case you are not sure, I could suggest to restore factory settings of the parameters, connect the external signals as required and then try again.
Still I don't think reloading of firmware is your solutions. Practically no reason the firmware to be wrong, even if the drive is not used for a long time.

by jossel37 Rank: 1875 on 11/8/2018 5:41:55 AM | Like (0) | Report

Good day sir,

I have checked the external circuits for the digital inputs. Have also check their functionality and found them to be in order. One thing o noticed is that the RDYON bit on the status word is missing. I have checked the firmware manual and as per my understanding once the AUXSUPPLY is present the RDYON status should be present.

The drive is a DCS A01 4000 05, all DIs and DOs are factory prewired

by kstoilov AKS expert

Rank: 5 on 11/8/2018 7:00:46 AM | Like (0) | Report

Hi,
It seems your drive is pre-assembled in the factory. In this case, do you have a principle diagram of the complete set, not only of the inverter? Without this diagram, and a full list of parameters, I can't give you more advise.
RDYON depends on some DI. After you provide an aux power supply, usually the DCS switch on DO (X96-1 and 2 closes) - no internal fault. And normally this output (relay) switch on the main contactor. Do you have the main contactor on?
Also, depends on how the drive is wired, it could control the cooling fan, cooling air pressure and other aux devices. All these conditions are checked, usually with some DI of the drive.
So, in summary, I could suggest you to ask directly your supplier of the drive. They should know the start-up procedure and help you much easier.

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kstoilov

Rank: 5

Answered 5 months ago

Source: DCS800 firmware manual

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Hi,

Here is one example of control signals connections from the HW manual for DCS800. Look -X6 for DI. There are different typical diagrams, according to your specific application.

You should ensure the requested control signals are connected.
I suppose there is no fieldbus control, but even in this case you should supervise at least input contactor.

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kstoilov

Rank: 5

Answered 5 months ago

Source: DCS800 HW and FW manuals

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