i have a module name "quality" (this module is working good). models.py code:

# -*- coding: utf-8 -*-
from openerp import models, fields, api
class myquality(models.Model):
	_name = 'myquality.myquality'
	product_sn = fields.Char(string='Serial Number', required=True,)
	date = fields.Date(string='Date')
	description = fields.Text('Notes')

    
		
		
		
		
		
        
            Quality
            myquality.myquality
            tree,form
        
		
        
 		
        
            view.quality.fdi.tree
            myquality.myquality
            
                
					
                    
                
            
        
 		
        
            view.quality.fdi.form
            myquality.myquality
            
                
                    
                        
                            
								                               
                                
								
                            
                        
                        
                            
                                
                            
                        
                    
                
            
        
    

...
'data': [
        # 'security/ir.model.access.csv',
        'views.xml',
        'templates.xml',
		'secuencias.xml',
    ],
...

# -*- coding: utf-8 -*-
from openerp import models, fields, api
class mysecuencia(models.Model):
	_inherit = 'myquality.myquality'
	fdi_code = fields.Char ('FDI Code', size=6, readonly=True)
	def create(self, cr, uid, vals, context=None):
		vals['fdi_code']=self.pool.get('ir.sequence').get(cr, uid,'myquality.myquality')
		res=super(myquality_myquality, self).create(cr, uid, vals)
		return res

    
 		
        
            FDI Code
            myquality.myquality
			TRUE
			FDI
			1
			1
            3
			standard
        
        


		
			my.secuences.in.fdi.tree.inherit
			myquality.myquality
			
			
				
					
				
			
		
    

Axel, ca you donwload my modules at: http://clasificadoshidalgo.com/tmp/odoo9/modules.tar.gz The module myquality works fine The module mysecuencia must: 1.- Add a sequence "FDI" to settings/sequences

I made some changes to the code of your module mysecuencia. Basically I add a new field "seq" and override the create method to show you what I told you on my answer. You can donwload it from
http://filesftp.soltein.org/files/mysecuencia.zip Don't forget to upvote and accept the answer if was helpful to you

Axel, Thank you very much :-). It works. When i save the new record, the title name is "Quality / myquality.myquality,1" Do you know how put the title like "Quality / FDI001" just like sale order "Quotation / SO001"

Just put a label, see the answer update since I cannot put html code in comments

Thank you Axel, in this picture i show you what title i need to change to Quality / FDIXXX: http://clasificadoshidalgo.com/tmp/odoo9/title.jpg if i put you previus code just add a white line in the top of the form with label "Quality". Thank you for you help.