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My Drive is showing nSt when I power up and we can not get beyond this.
nSt can mean a number of different things for different drives and is dependent on the way they have been set up to operate, therefore we will start with the basic possibility.
In some applications the drive is required to start as soon as the Mains supply is applied, this has a safety implication which must be addressed first by the user, and if it is deemed safe to do so the following set up must be followed correctly or nSt will appear.
On ATV12, ATV312, ATV31C and the ATV320 the first thing you will have to do is to remove any run signal that is currently applied. Then go to the I_O- menu and then into the tCt parameter, here you will have to change the setting from TRN to LEL and press enter to lock this setting in.
Now you can link between the terminals +24 and LI1 in this case as soon as the power is applied the drive will start off in the forward direction. If you require it run in the reverse direction the link should be between +24 and LI2.
For the ATV61 and ATV71 Go to the menu 1.5 Inputs / Outputs CFG and for the ATV32 it is the FULL > I_O- menu. Then in all three cases you go to 2 Wire Type (tCt) and change to setting from Transition (TRN) to Level (LEL) and then follow the procedure above.
In the ATV600 and 900 series you need to go to the menu complete settings, command and reference and set the two wire type to LEL.
In the ATV320, It's RDY > CONF > FULL > I_O- > TCT --- Change this from TRN to LEL.
A second application is for the drive to be in three wire control, this is where start and stop buttons are used to control the drive. This is achieved by setting tCC parameter in the I - O - menu to 3 wire type, which automatically sets LI1 to stop LI2 to run forward and LI3 to run reverse. This means that LI1 should have a normally closed contact across it, so if for some reason this contact is open the drive will not start and displays nSt. this will disappear when the contact is closed, the drive will then show rdy.
Another application is that an input is set up as a stop type, this input must be held at 24v to allow the drive to run. If this signal is not at 24v the Stop will be applied and nSt displayed on the front of the drive and will remain on the display until the 24v is restored to the logic input.
On the ATV31, ATV312, ATV32, ATV320, ATV61, ATV71, ATV600 and ATV900 series drives the code nSt can also appear when these drives are controlled by a communications system if the drive is not being told to operate it will sit at nSt until the controller tells it to run, Depending on the type of network method used.
In some applications the drive is required to start as soon as the Mains supply is applied, this has a safety implication which must be addressed first by the user, and if it is deemed safe to do so the following set up must be followed correctly or nSt will appear.
On ATV12, ATV312, ATV31C and the ATV320 the first thing you will have to do is to remove any run signal that is currently applied. Then go to the I_O- menu and then into the tCt parameter, here you will have to change the setting from TRN to LEL and press enter to lock this setting in.
Now you can link between the terminals +24 and LI1 in this case as soon as the power is applied the drive will start off in the forward direction. If you require it run in the reverse direction the link should be between +24 and LI2.
For the ATV61 and ATV71 Go to the menu 1.5 Inputs / Outputs CFG and for the ATV32 it is the FULL > I_O- menu. Then in all three cases you go to 2 Wire Type (tCt) and change to setting from Transition (TRN) to Level (LEL) and then follow the procedure above.
In the ATV600 and 900 series you need to go to the menu complete settings, command and reference and set the two wire type to LEL.
In the ATV320, It's RDY > CONF > FULL > I_O- > TCT --- Change this from TRN to LEL.
A second application is for the drive to be in three wire control, this is where start and stop buttons are used to control the drive. This is achieved by setting tCC parameter in the I - O - menu to 3 wire type, which automatically sets LI1 to stop LI2 to run forward and LI3 to run reverse. This means that LI1 should have a normally closed contact across it, so if for some reason this contact is open the drive will not start and displays nSt. this will disappear when the contact is closed, the drive will then show rdy.
Another application is that an input is set up as a stop type, this input must be held at 24v to allow the drive to run. If this signal is not at 24v the Stop will be applied and nSt displayed on the front of the drive and will remain on the display until the 24v is restored to the logic input.
On the ATV31, ATV312, ATV32, ATV320, ATV61, ATV71, ATV600 and ATV900 series drives the code nSt can also appear when these drives are controlled by a communications system if the drive is not being told to operate it will sit at nSt until the controller tells it to run, Depending on the type of network method used.
Released for:Schneider Electric UK
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