diff --git a/Config_Topup.md b/Config_Topup.md
new file mode 100644
index 0000000..30ee979
--- /dev/null
+++ b/Config_Topup.md
@@ -0,0 +1,16 @@
+# Topup
+This file contains the topup settings.
+
+See source:trunk/PixelatorController/config/topup.json for an example.
+
+ **active**::
+ Integer value 1 activates topup handling.
+ **Default**: 0
+
+ **channel**::
+ String value defines the EPICS address of the topup channel.
+ Mandatory for topup handling.
+
+ **wait_time**::
+ Float value defines the delay (in seconds) between when the topup signal stops and when stxm measurements resume.
+ **Default**: 0
\ No newline at end of file