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Join Date: Jan 2012
Posts: 2

Ice Cube Relay

01/03/2012 3:11 PM

I am trying to figure out how to make this work. I have a Toshiba H9 ASD that is replacing an older H3. I have an E-Stop in a remote location that has always been used to shut off the drive, but with the new drive, once the E-Stop is pulled, the drive will start running again. The E-Stop is running off a N/O contact. I need to wire another relay for a reset so that once the E-stop is pushed, the drive cannot start until the reset has been pushed.

Thanks for the help

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#1

Re: Ice Cube Relay

01/03/2012 3:54 PM

If your relay has an additional set of contacts, use the spare N/O contact to latch your relay coil. You will need a N/C momentary switch in series with the contact to reset the relay.

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#2

Re: Ice Cube Relay

01/03/2012 3:58 PM

I don't see the problem here...Is the question about the particular relay to use?

Relay with manual reset

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#3

Re: Ice Cube Relay

01/03/2012 4:46 PM

The H9 has inputs for forward and reverse command inputs from a switch. There is selection with in the programing to select a remote command. Along with that E stop is there a start button?

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#5
In reply to #3

Re: Ice Cube Relay

01/04/2012 6:42 AM

The Forward is where it gets the run command. It is powered from the E-stop relay. It is started from the Run button on the display. I can do a start/stop from our PLC, but we still have the safety issue problem with the drive running as soon as the Press operator, who is in a different building, pulls the E-stop. If there is no one in the control room, where the drive is located, to stop the drive then we have the possibility of the tank over flowing.

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#6
In reply to #5

Re: Ice Cube Relay

01/04/2012 6:59 AM

I am with Ozzb on this one. You should be able to find the correct "E-Stop" circuit in the manual for the unit. It sounds like terminology is off a bit on what your calling a stop button and what an "E-Stop" is. If it is wired as stated, it is a stop button only and the unit will start as you suggest. If you do not have a controls person in your group, ask the supplier to give you some technical help on this one. It is hard for any of us to determine a fix without seeing all of the information. Most of these types of controllers are very versatile and can be made to have controls as needed without adding relays.

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#7
In reply to #5

Re: Ice Cube Relay

01/04/2012 7:05 AM

The E-stop should cut all source of power to control circuits. It should not be applying power as a signal to the forward command terminal when engaged. This input is momentary. Place the E stop in the circuit so it cuts all control power. Then you will have to press the run button to get it started again.

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#4

Re: Ice Cube Relay

01/04/2012 3:26 AM

Your E stop should be n/c in the latching circuit with manual latch reset.

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#8

Re: Ice Cube Relay

01/04/2012 11:09 AM

It sounds as if the new drive may be configured for 2 wire control, and the old drive was 3 wire control. Check your drive parameters.

If this is an E-Stop, it should be wired in the E-Stop circuit, not the start stop start circuit. Check your wiring.

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#9
In reply to #8

Re: Ice Cube Relay

01/04/2012 1:38 PM

I agree, or use it in the "Enable" I/O input whatever the Mfg. or situation allows.

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#10

Re: Ice Cube Relay

01/04/2012 4:05 PM

Since the OLD drive operated they way in which you intended, then check your control parameters. Make sure that auto restart is OFF. Also Make sure that the wiring is correct. Is the E Stop between the CC and ST terminals? Is the Run command dropping out when the E-Stop is pushed?

On The H9 drive you can monitor the input to verify what commands you are giving the drive. ( see the manual )

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