The detector control systems for the CMS Resistive Plate Chamber

The Resistive Plate Chamber system is composed by 912 double-gap chambers equipped with about 10
⁴
front-end boards. The correct and safe operation of the RPC system requires a sophisticated and complex online Detector Control System, able to monitor and control 2·10
⁴
hardware devices distributed on an area of about 5000 m
²
. The RPC DCS acquires, monitors and stores about 10
⁵
parameters coming from the detector, the electronics, the power system, the gas, and cooling systems. The DCS system and the first results, obtained during the 2007 and 2008 CMS cosmic runs, will be described in this note.