diff --git a/global.h b/global.h
index e66e669..acfc055 100644
--- a/global.h
+++ b/global.h
@@ -35,7 +35,7 @@
 
 
 #define PROGRAM_NAME          "DSRemote"
-#define PROGRAM_VERSION       "0.35_1705141924"
+#define PROGRAM_VERSION       "0.35_1705151151"
 
 #define MAX_PATHLEN            4096
 
diff --git a/interface.cpp b/interface.cpp
index 1e6ddf7..6d6a093 100644
--- a/interface.cpp
+++ b/interface.cpp
@@ -1874,6 +1874,13 @@ void UI_Mainwindow::playpauseButtonClicked()
   }
   else
   {
+    if((devparms.modelserie == 6) && (devparms.func_wrec_enable == 1))  // DS6000 series record mode
+    {
+      set_cue_cmd(":FUNC:WRM PLAY");
+
+      devparms.func_wrec_enable = 2;  // DS6000 series play mode
+    }
+
     devparms.func_wplay_operate = 1;
 
     devparms.func_wplay_fcur = 0;
@@ -1913,6 +1920,13 @@ void UI_Mainwindow::recordButtonClicked()
 
   if(devparms.func_wrec_operate)  return;
 
+  if(devparms.func_wrec_enable == 2)  // DS6000 series play mode
+  {
+    set_cue_cmd(":FUNC:WRM REC");
+
+    devparms.func_wrec_enable = 1;  // DS6000 series record mode
+  }
+
   statusLabel->setText("Record on");
 
   if(devparms.modelserie == 6)
diff --git a/playback_dialog.cpp b/playback_dialog.cpp
index a4fb711..ef4e90b 100644
--- a/playback_dialog.cpp
+++ b/playback_dialog.cpp
@@ -38,11 +38,19 @@ UI_playback_window::UI_playback_window(QWidget *w_parent)
 
   mainwindow->set_cue_cmd(":FUNC:WREC:FMAX?", rec_fmax_resp);
   mainwindow->set_cue_cmd(":FUNC:WREC:FEND?", rec_fend_resp);
-  mainwindow->set_cue_cmd(":FUNC:WREC:FINT?", rec_fint_resp);
+  if(devparms->modelserie != 6)
+  {
+    mainwindow->set_cue_cmd(":FUNC:WREC:FINT?", rec_fint_resp);
+    mainwindow->set_cue_cmd(":FUNC:WREP:FINT?", rep_fint_resp);
+  }
+  else
+  {
+    mainwindow->set_cue_cmd(":FUNC:WREC:INT?", rec_fint_resp);
+    mainwindow->set_cue_cmd(":FUNC:WREP:INT?", rep_fint_resp);
+  }
   mainwindow->set_cue_cmd(":FUNC:WREP:FST?", rep_fstart_resp);
   mainwindow->set_cue_cmd(":FUNC:WREP:FEND?", rep_fend_resp);
   mainwindow->set_cue_cmd(":FUNC:WREP:FMAX?", rep_fmax_resp);
-  mainwindow->set_cue_cmd(":FUNC:WREP:FINT?", rep_fint_resp);
 
   setWindowTitle("Record/Playback");
 
@@ -113,13 +121,13 @@ UI_playback_window::UI_playback_window(QWidget *w_parent)
 
   toggle_playback_button = new QPushButton(this);
   toggle_playback_button->setGeometry(20, 255, 100, 25);
-  if(devparms->func_wrec_enable == 1)
+  if(!devparms->func_wrec_enable)
   {
-    toggle_playback_button->setText("Disable");
+    toggle_playback_button->setText("Enable");
   }
   else
   {
-    toggle_playback_button->setText("Enable");
+    toggle_playback_button->setText("Disable");
   }
   toggle_playback_button->setAutoDefault(false);
   toggle_playback_button->setDefault(false);
@@ -196,7 +204,7 @@ void UI_playback_window::toggle_playback()
   QMessageBox msgBox;
   msgBox.setText("Timebase scale must be <= 100mS.");
 
-  if(devparms->func_wrec_enable == 0)
+  if(!devparms->func_wrec_enable)
   {
     if(devparms->timebasedelayenable)
     {
@@ -229,6 +237,10 @@ void UI_playback_window::toggle_playback()
     {
       mainwindow->set_cue_cmd(":FUNC:WREC:ENAB ON");
     }
+    else
+    {
+      mainwindow->set_cue_cmd(":FUNC:WRM REC");
+    }
   }
   else
   {
@@ -254,6 +266,10 @@ void UI_playback_window::toggle_playback()
     {
       mainwindow->set_cue_cmd(":FUNC:WREC:ENAB OFF");
     }
+    else
+    {
+      mainwindow->set_cue_cmd(":FUNC:WRM OFF");
+    }
   }
 }
 
@@ -282,7 +298,14 @@ void UI_playback_window::rec_fint_spinbox_changed(double fint)
 
   strcat(str, "S");
 
-  sprintf(str, ":FUNC:WREC:FINT %e", fint);
+  if(devparms->modelserie != 6)
+  {
+    sprintf(str, ":FUNC:WREC:FINT %e", fint);
+  }
+  else
+  {
+    sprintf(str, ":FUNC:WREC:INT %e", fint);
+  }
 
   mainwindow->set_cue_cmd(str);
 }
@@ -328,7 +351,14 @@ void UI_playback_window::rep_fint_spinbox_changed(double fint)
 
   mainwindow->statusLabel->setText(str);
 
-  sprintf(str, ":FUNC:WREP:FINT %e", fint);
+  if(devparms->modelserie != 6)
+  {
+    sprintf(str, ":FUNC:WREP:FINT %e", fint);
+  }
+  else
+  {
+    sprintf(str, ":FUNC:WREP:INT %e", fint);
+  }
 
   mainwindow->set_cue_cmd(str);
 }
diff --git a/read_settings_thread.cpp b/read_settings_thread.cpp
index 6059691..82e14dd 100644
--- a/read_settings_thread.cpp
+++ b/read_settings_thread.cpp
@@ -2618,6 +2618,38 @@ void read_settings_thread::run()
         goto GDS_OUT_ERROR;
       }
   }
+  else
+  {
+    if(tmc_write(":FUNC:WRM?") != 10)
+    {
+      line = __LINE__;
+      goto GDS_OUT_ERROR;
+    }
+
+    if(tmc_read() < 1)
+    {
+      line = __LINE__;
+      goto GDS_OUT_ERROR;
+    }
+
+    if(!strcmp(device->buf, "REC"))
+    {
+      devparms->func_wrec_enable = 1;
+    }
+    else if(!strcmp(device->buf, "PLAY"))
+      {
+        devparms->func_wrec_enable = 2;
+      }
+      else if(!strcmp(device->buf, "OFF"))
+        {
+          devparms->func_wrec_enable = 0;
+        }
+        else
+        {
+          line = __LINE__;
+          goto GDS_OUT_ERROR;
+        }
+  }
 
   if(devparms->func_wrec_enable)
   {