PLC sequence and machine states
Translate the agreed process into explicit states, transitions, permissives, alarms and recovery behavior. The final sequence should be reviewed against the machine's actual operating procedure.
Industrial Automation Products · Engineering Services · Quote Support
Printing & Converting
Unwinding Automation
Unwinding controls coordinate roll supply and web movement with downstream equipment using the feedback available on the line. Automation scope depends on the equipment, operating sequence, existing controls and process requirements. Share the machine details and desired outcome to define a suitable control approach.
Application overview
Unwinding controls coordinate roll supply and web movement with downstream equipment using the feedback available on the line.
Typical requirements to define
- Unwind stand and brake or drive arrangement
- Roll diameter or web feedback if available
- Required tension behavior and line speed reference
- Splice, stop and roll-change procedures
Example process sequence
- Prepare roll and confirm web path
- Establish line-ready and unwind permissives
- Coordinate unwind output with downstream line demand
- Monitor available tension, speed or drive feedback
- Support defined splice, stop and roll-change states
Printing sequence and web handling
Control scope can include station coordination, line speed references, registration inputs and coordinated acceleration or deceleration. Tension and cut control depend on the machine mechanics and installed feedback devices.
Operator interface and alarms
An HMI may show mode, step, status, setpoints and actionable alarm information. Screen behavior and operator permissions should match the plant's procedures.
Motor drives and instrumentation
Where installed equipment supports it, drives can be controlled through suitable hardwired or network interfaces. Sensors and transmitters should be selected and scaled to the machine and process requirements.
Safety and fault handling
Safety functions must be designed for the risk assessment and applicable machine requirements. Standard PLC logic should not be treated as a substitute for safety-rated hardware or a validated safety design.
Web tension and roll behavior
Tension control may use different feedback and actuator arrangements. The roll mechanics, material limits and installed sensors determine whether closed-loop control is appropriate.
Related automation technologies
Explore the control systems that may be relevant to this scope.
Products from the catalog
These active catalog products are related by their existing category. Confirm model compatibility and availability for your application.
PLC
Siemens S7-1200 CPU 1214C DC/DC/DC PLC – 14DI/10DO/2AI, 6ES7214-1AG40-0XB0
Siemens S7-1200 CPU 1214C DC/DC/DC PLC with 14 digital inputs, 10 digital transistor outputs and 2 analog inputs. 24 V DC supply, 150 KB program/data memory and PROFINET communication.
VFD & Drives
Delta VFD EL SERIES 0.025 TO 5 HP | 0.2KW TO 3.7KW
Delta VFD002EL21A 0.2kW (0.25HP) VFD with 200–240V single-phase input, 3-phase output, 1.6A rated output current, V/F control, RS-485 Modbus, built-in braking transistor and 0.1–600Hz frequency range.
HMI
Delta DOP-107CV 7 Inch Touchscreen HMI – 800×480 TFT, RS-232/RS-485/RS-422, USB
Delta DOP-107CV 7-inch industrial touchscreen HMI with 800×480 resolution, 65,536-color TFT display, 256 MB RAM/ROM, RS-232/RS-485/RS-422 communication, USB Host/Client, and 24 VDC power supply.
PLC
Delta DVP28SV11T2 PLC – DVP-SV2 Series, 16 Digital Inputs, 12 Transistor Outputs, 24V DC
Delta DVP28SV11T2 DVP-SV2 Series high-performance slim PLC with 16 digital inputs and 12 NPN transistor outputs. Featuring high-speed processing, high-speed counters and pulse outputs, it is suitable for machine automation, motion control, packaging, printing, conveyor and industrial control applications
PLC
Delta DVP12SA2 PLC – DVP-SA2 Advanced Slim PLC, 8DI/4DO, 24VDC, RS-232/RS-485
Delta DVP12SA2 DVP-SA2 Advanced Slim PLC with 8 digital inputs, 4 digital outputs, 24VDC supply, 16K steps and RS-232/RS-485 Modbus communication.
PLC
Delta DVP60ES200R PLC – DVP-ES2, 36DI/24 Relay Output, 16K Steps
Delta DVP60ES200R DVP-ES2 PLC with 36 digital inputs, 24 relay outputs, 100–240VAC power supply and 16K-step program capacity for industrial automation.
PLC
Delta DTC1000 Temperature Controller – 24VDC, PID/ON-OFF Control, RS-485 Modbus
Delta DTC1000 modular temperature controller with 24VDC supply, PID/ON-OFF control, multiple sensor inputs and RS-485 Modbus communication.
PLC
Delta DVP14SS211R PLC – DVP-SS2 Slim PLC, 8DI/6 Relay Outputs, 24VDC, RS-232/RS-485
Delta DVP14SS211R DVP-SS2 Slim PLC with 8 digital inputs, 6 relay outputs, 24VDC supply, RS-232/RS-485 communication and Modbus support.
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Frequently asked questions
What information is useful for a unwinding automation enquiry?
Describe the machine or process, current controls, operating sequence, required modes, available drawings and the changes you want to make. Include known controller and drive models where possible.
Can existing equipment be considered?
Yes. Include the installed controller, HMI, drives, sensors and any drawings or fault details so the existing arrangement can be reviewed before defining scope.
Discuss your automation requirements
Share the equipment details, current controls and process sequence for a scope review.