Code 380072: PROFIBUS/PROFINET: Output slot for basic address %1 (size %2) not allowed
Issue Description & Safety Warning
The Siemens SINUMERIK 840D CNC has triggered a critical PROFIBUS/PROFINET: Output slot for basic address %1 (size %2) not allowed alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.
Official Troubleshooting Steps
Parameters: %1 = Logical base address of the requested area %2 = Size of the area in bytes Definitions: An incorrect logical base address was set for a digi tal or analog output, the area is resides in the access range of the PLC (PIQ, base addresses < 256). For length =1 it is a digital output, For length =2 it is an analog output. Reaction: Channel not ready. NC Start disable in this channel. Interface signals are set. Alarm display. Drives alarms Remedy: Only use addresses outside the PLC proces s image (e.g. >= 256) for output slots. Enter correct basic addresses in the machine data: - For length=1: Correct machine data MN_HW_ASSIGN_DIG_FASTOUT. - For length=2: Correct machine data MN_HW_ASSIGN_ANA_FASTOUT. - NCK restart If the error cannot be eliminated by this procedure, please make a note of the error text and contact the control system manufacturer. Program Continuation: Switch control OFF - ON.
Source: SINUMERIK 840D sl / 840Di sl / SINAMICS S120 Diagnostics Manual (DAsl, 03/2009)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Siemens SINUMERIK 840D CNC Alarms
Siemens controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code 380072 on the SINUMERIK 840D CNC identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Siemens's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 4014 Siemens SINUMERIK 840D CNC codes.
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