What does SLP mean on the DCS50?
The "slp" message on the DCS50 means that the unit thinks it is temporarily in sleep mode.
This may occur if the LocoNet data line is grounded for more than 1/8 of a second.
You may initially try to exit Sleep Mode by cycling the "Exit" key on the DCS50, or powering down and repowering the unit.
If this problem continues, you must check your LocoNet for a shorted connection.