diff --git a/js/index.js b/js/index.js
index be92f1a..ee6a39a 100644
--- a/js/index.js
+++ b/js/index.js
@@ -54,4 +54,19 @@ function login() {
             pin = "";
         }
     });
+}
+
+function signIn(user, password) {
+    $.post({
+        urlPath: 'vnUsers/sign-in',
+        jsonData: {user, password},
+        processData: false,
+        success: function (data) {
+            localStorage.setItem("token", data.token);
+            localStorage.setItem("ttl", data.ttl);
+            localStorage.setItem("password", password);
+            localStorage.setItem("created", Date.now());
+            getTokenConfig();
+        },
+    })
 }
\ No newline at end of file
diff --git a/js/main.js b/js/main.js
index b1bc87c..28c1d25 100644
--- a/js/main.js
+++ b/js/main.js
@@ -1,4 +1,6 @@
 const user = "timeControl";
+const renewPeriod = localStorage.getItem('renewPeriod');
+let intervalId, isCheckingToken;
 
 function confirmReset() {
     $(".confirm").removeClass('confirmKO');
@@ -16,20 +18,50 @@ function printError(msg){
     }, 2300);
 }
 
-function signIn(user, password) {
+function renewToken() {
     $.post({
-        urlPath: 'vnUsers/sign-in',
-        jsonData: {user, password},
+        urlPath: 'vnUsers/renewToken',
         processData: false,
         success: function (data) {
-            localStorage.setItem("token", data.token);
+            localStorage.setItem("token", data.id);
             localStorage.setItem("ttl", data.ttl);
-            localStorage.setItem("password", password);
-            localStorage.setItem("signInTime", Date.now());
+            localStorage.setItem("created", Date.now());
         },
     })
 }
 
+function getTokenConfig() {
+    const filter = {fields: ['renewInterval', 'renewPeriod']};
+    $.get({
+        urlPath: 'AccessTokenConfigs/findOne',
+        jsonData: filter,
+        processData: false,
+        success: function (data) {
+            if (!data) return;
+            localStorage.setItem('renewPeriod', data.renewPeriod);
+            clearInterval(intervalId);
+            intervalId = setInterval(() => checkValidity(), data.renewInterval * 10);
+        },
+    })
+}
+
+function checkValidity() {
+    const created = localStorage.getItem('created');
+    const ttl = localStorage.getItem('ttl');
+
+    if (isCheckingToken || !created) return;
+    isCheckingToken = true;
+    
+    const renewPeriodInSeconds = Math.min(ttl, renewPeriod) * 1000;
+    const maxDate = created + renewPeriodInSeconds;
+    const now = new Date();
+    
+    if (now.getTime() <= maxDate) return isCheckingToken = false;
+    
+    renewToken();
+    isCheckingToken = false;
+}
+
 $.ajaxPrefilter(function(xhr) {
     const orgErrorHandler = xhr.error;
     const token = localStorage.getItem('token')
@@ -53,6 +85,8 @@ $.ajaxPrefilter(function(xhr) {
                 }
             }
 
+            if(xhr?.responseJSON.error.code == 'periodNotExceeded') return;
+
             switch (textStatus){
                 case 'parsererror':
                     mensaje = 'Requested JSON parse failed';
@@ -82,19 +116,9 @@ $.ajaxPrefilter(function(xhr) {
                     mensaje = 'Ha ocurrido un error, consulta con informática';
             }
             printError(mensaje);  
+            
         }
     });
 });
 
-setInterval(function() {
-    const ttl = localStorage.getItem('ttl');
-    const password = localStorage.getItem('password');
-
-    if(ttl && password) {
-        const now = Date.now();
-        const signInTime = localStorage.getItem('signInTime');
-        const countdown = now - signInTime;
-
-        if(countdown < ttl) signIn(user, password)
-    }
-},3600000)// 1 hour
\ No newline at end of file
+if(renewPeriod) getTokenConfig();
\ No newline at end of file