diff --git a/IOB-PI/std_v_2/IOB.cfg b/IOB-PI/std_v_2/IOB.cfg
index 9d9c1de..6fdb45b 100644
--- a/IOB-PI/std_v_2/IOB.cfg
+++ b/IOB-PI/std_v_2/IOB.cfg
@@ -33,3 +33,14 @@ bit4 = 0
 bit5 = 0
 bit6 = 0
 bit7 = 0
+
+[invert]
+bit0 = 0
+bit1 = 1
+bit2 = 0
+bit3 = 0
+bit4 = 0
+bit5 = 0
+bit6 = 0
+bit7 = 0
+
diff --git a/IOB-PI/std_v_2/readParallela.py b/IOB-PI/std_v_2/readParallela.py
index 6e36bec..4450429 100644
--- a/IOB-PI/std_v_2/readParallela.py
+++ b/IOB-PI/std_v_2/readParallela.py
@@ -1,10 +1,11 @@
 #!/usr/bin/python
 # -*- coding: utf-8 -*-
 
-# readParallela v. 2.0
+# readParallela v. 2.1
 # - single instance timer
 # - invio multiplo x send eventi accodati
 # - gestione segnali BLINKING
+# - gestione INVERSIONE segnali cv 10-VII-2018
 
 #---------------------------------------------------------------
 # levare locking
@@ -39,7 +40,7 @@ MAXRETRY = 3
 # numero campioni filtraggio segnale ballerino
 MAX_COUNTER_BLINK = 10
 
-PROGRAM_NAME ="ReadPar IOB-pi v.2.0"
+PROGRAM_NAME ="ReadPar IOB-pi v.2.1"
 
 # DA FILE CONF
 idxMacchina  = "1001"
@@ -92,6 +93,8 @@ B_previous = array ( 'B',[0,0,0,0,0,0,0,0])
 B_input = array ( 'B',[0,0,0,0,0,0,0,0])
 B_output = array ( 'B',[0,0,0,0,0,0,0,0])
 
+B_inverting = array ( 'B',[0,0,0,0,0,0,0,0])
+
 #--------------------------------------------------------------
 # Gestione coda (condivisa) x registrazione eventi ed invio URL
 #print "Creazione coda illimitata"
@@ -165,6 +168,15 @@ def readParallelaFiltrata():
         #ciclo per ogni segnale    
         for i in xrange(8) :
             # print (i)
+            
+            # gestione inversione bit ingresso
+            
+            if ( B_inverting[i] == 1 ) :
+            	if ( B_input[i] == 0 ) :
+            		B_input[i] = 1
+            	else :
+            		B_input[i] = 0
+                        
             # se non blinking, copia ingresso
             if ( B_blinking[i] == 0 ) :
                 B_output[i] = B_input[i]
@@ -443,9 +455,20 @@ try:
     B_blinking[5] = config.getint ( 'blink' , 'bit5'   )
     B_blinking[6] = config.getint ( 'blink' , 'bit6'   )
     B_blinking[7] = config.getint ( 'blink' , 'bit7'   )
-    
+        
     MAX_COUNTER_BLINK = config.getint ( 'blink' , 'MAX_COUNTER_BLINK'   )
 
+    # cv 2.1 se bit = 1 allora inverto segnale in ingresso...
+    
+    B_inverting[0] = config.getint ( 'invert' , 'bit0'   )
+    B_inverting[1] = config.getint ( 'invert' , 'bit1'   )
+    B_inverting[2] = config.getint ( 'invert' , 'bit2'   )
+    B_inverting[3] = config.getint ( 'invert' , 'bit3'   )
+    B_inverting[4] = config.getint ( 'invert' , 'bit4'   )
+    B_inverting[5] = config.getint ( 'invert' , 'bit5'   )
+    B_inverting[6] = config.getint ( 'invert' , 'bit6'   )
+    B_inverting[7] = config.getint ( 'invert' , 'bit7'   )   
+                                                                
     
 except:
     print  "\n\n" + PROGRAM_NAME + ' - Error 4 - in config file ' 'IOB.cfg'