Look for mechanical resistance, such as a lack of lubrication on a ball screw or linear guide.
: Signal inputs on the [X1] master interface conflict with your FCT software parameter configuration.
: This is the most common mechanical error. It occurs when the motor "slips" or hits a physical obstruction. Check for mechanical binding or increase the tolerance in the FCT software.
Monitoring Fault): The motor has operated at peak current for too long. This points to mechanical binding, excessive friction along the axis, or a mismatched motor sizing profile. Check the axis for smooth travel and ensure parameters match the connected stepper motor.
A dual-channel safety function (Category 3, PL e) that safely disconnects the power to the motor. cmmo-st-c5-1-diop error codes
The [X3] STO interface manages dual-channel functional safety operations.
The master PLC stopped sending cyclic monitoring telegrams within the defined timeout window. To troubleshoot, verify Ethernet cabling, check the network switch reliability, or increase the watchdog timeout parameters inside the FCT interface if network latency is high. 4. Safety Circuit and STO Faults (0x50–0x5F)
The CMMO-ST has an integrated web server. Enter its IP address into a browser to view basic status and diagnostics. LED Indicators:
The controller utilizes a to communicate its status and diagnostic messages. Look for mechanical resistance, such as a lack
The is a compact stepper motor controller designed for use with two-phase stepper motors. It features a digital I/O interface (DIO) and supports the Safe Torque Off (STO) safety function to prevent accidental engine restarts. Diagnostic Display and Error Format
The CMMO-ST-C5-1-DIOP employs a three-tier classification system for diagnostic messages. These classifications can be parameterized using the Festo Configuration Tool (FCT).
The Festo CMMO-ST-C5-1-DIOP Go to product viewer dialog for this item.
) power inputs. Check for voltage sags when the motor accelerates. It occurs when the motor "slips" or hits
Check the Status LED on the front of the CMMO-ST. A flashing red light usually indicates a fault.
Ensure logic and load power loops use separate, stabilized 24V DC switch-mode power supplies to prevent motor noise from resetting the controller logic. Cable and Shielding Rectification
Includes "Drag error monitoring" (following error) and "Software end-position detection" if the motor cannot reach its target or hits a software limit.