FM 455 controller module Siemens

Область применения

The FM 455 closed-loop control module is the intelligent 16-channel closed-loop control module for universal closed-loop control tasks.

It may be used for

• Temperature control
• Pressure control
• Flow control
• Level control

in the following areas:

• General mechanical engineering
• Plant building
• Industrial furnaces
• Cooling and heating apparatus
• Food and drinks industry
• Rubber and plastics machines
• Chemical and process industries
• Glass and ceramics
• Wood and paper industry.

The FM 455 is offered in two versions:

• FM 455 C as a continuous-action controller with 16 analog outputs for controlling analog actuators
• FM 455 S as step or pulse controller with 32 digital outputs for controlling motorized (integrating) actuators or binary-controlled actuators (e.g., electrical strip heaters and tube heaters)

The FM 455 can be used in the SIMATIC S7-400.

Обзор

• 16-channel closed-loop control module for universal control tasks
• Can be used for temperature, pressure and flow controls
• Convenient online self-optimization for temperature controls
• Predefined controller structures
• 2 control algorithms
• 2 versions:
  • FM 455 C as continuous controller
  • FM 455 S as step or pulse controller
• With 16 analog outputs (FM 455 C) or 32 digital outputs (FM 455 S) for actuators

Дизайн

• User-friendly wiring:
  Sensors and actuators are connected via two separate 48-pin front connectors.
• LEDs:
  • Red internal fault LEDs
  • Red external fault LEDs
  • Green LEDs for digital input status display
  • Yellow LED for indicating backup operation
• High-performance measured data acquisition:
  The module has 16 analog inputs for analog value acquisition and disturbance variable input as well as 1 additional analog input for temperature compensation when used with thermocouples.
• Various encoders can be used:
  Thermocouples, Pt 100, voltage encoders, current encoders.
• Extensive I/O:
  • FM 455 C: 16 analog outputs for analog actuators
  • FM 455 S: 32 digital outputs for motor-driven actuators or binary-controlled actuators.

The 24 V DC supply for the actuators is applied externally.

Configuring package

The configuring package required for configuration comprises:

• Manual
• Parameter assignment screen forms
• Standard function blocks for data exchange with the CPU

Функции

The FM 455 has 16 separate closed-loop control channels. The controllers display the following features:

• Prefabricated controller structures for:
  • Fixed setpoint control,
  • Cascade control,
  • Ratio control,
  • 3-component control.
• Choice of modes:
  Automatic mode, manual mode, safety operation, follow-up mode and backup mode
• Sampling time (depending on the resolution of the analog inputs and the compensation input):
  • For 12 bit: 20 to 180 ms.
  • For 14 bit: 100 to 1700 ms (depending on the number of enabled analog inputs)
• 2 control algorithms:
  Self-optimizing temperature algorithm, PID algorithm
• User-friendly controller optimization:
  The self-optimization function for the temperature algorithm is stored on the module and can be automatically activated in the case of setpoint changes of more than 12 %. the PID control algorithm is optimized using the parameterization screen forms in the configuring package
• Backup mode:
  In the event of CPU failure or CPU Stop, the controller can continue to operate independently.
• Disturbance variable input:
  the analog inputs can be used for feedforward compensation in addition to actual value acquisition, if desired.

Temperature controller with integrated self-setting

The temperature controller with integrated self-setting is suitable for controlled systems where the entire process has approximately the same temperature when the setpoint is reached, as is the case in water bath controls, steam boiler controls or injection molding machines.

The procedure is unsuitable for controlled systems where the temperature in a significant portion of the process still varies significantly after the setpoint has been reached, as is the case in furnace controls where the air heats up and the temperature is measured. When the air temperature has reached the setpoint, the furnace and its contents can still be cold.

Parameterization

A configuring package is available for parameterizing the FM 455. This contains all the screen forms required for configuring, parameterization and startup.

Detailed online Help is available for all screen forms.

The parameterization screen forms are called up from STEP 7 following installation.

Технические данные