Code 700024: PLC-MD wrong (coolant)
Issue Description & Safety Warning
The Chiron Siemens-Control CNC has triggered a critical PLC-MD wrong (coolant) 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
An inconsistency has been found between the coolant version used for the machine and the corresponding PLC machine data. The error has the following effect: Feed Stop No axis movements possible. Read disable Control reads no further program blocks into memory. 1. Match the PLC machine data to the coolant unit in use. 2. Turn off the control with the key [Control OFF] 3. Turn on the control with the key [Control ON] Message is cleared. This is a collective message. Error messages Cooling lubrication PLC-MD wrong (coolant) In the PLC status DB181.DBB2718, it is indicated which component or which PLC machine parameter has caused this message to appear. The corresponding bit, then, has a (1). In the following table, these bits are shown in more detail. DB Description DB181.DBB2718Bit 0 The coolant system “without high pressure“ is selected, but one of the "coolant high pressure" functions M7/M171-M177 was output. DB181.DBB2718Bit 1 A coolant system was activated which has no paperband filter, but the PLC input signal "Paperband filter present" is registered. DB181.DBB2718Bit 2 The coolant system "Without high pressure" was activated, but the PLC input signal "Clean water minimum" or "Superclean water minimum" is registered. DB181.DBB2718Bit 3 The PLC machine parameter "Without moisture sensor main spindle motor" was set, but the PLC input signal "Moisture sensor main spindle motor" is registered. DB181.DBB2718Bit 4 The coolant system "Without high pressure" was activated, but the PLC input signal "Coolant filter" is registered. DB181.DBB2718Bit 5 A PLC machine parameter "Without flow control device xxx" was set, but the PLC input signal "flow control device xxx" is registered. DB181.DBB2718Bit 6 DB181.DBB2718Bit 7
Source: CHIRON Error Message Overview, all series (Siemens control, V2.0.6, 2012)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Chiron Siemens-Control CNC Alarms
Chiron controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code 700024 on the Siemens-Control CNC identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Chiron's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 545 Chiron Siemens-Control CNC codes.
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