6ES7355-0VH10-0AE0 Siemens SIMATIC S7-300 Control Unit FM 355 C Original Brand New

• 4-channel closed-loop controller module for universal control tasks
• Can be used for temperature, pressure, flow and level controls
• Convenient online self-optimization for temperature controls
• Predefined controller structures
• 2 control algorithms
• 2 versions:
  • FM 355 C as continuous controller;
  • FM 355 S as step or pulse controller
• With 4 analog outputs (FM 355 C) or 8 digital outputs (FM 355 S) for direct control of the most common actuators
• Continuation of control mode also possible with CPU stop or failure

The FM 355 controller module is the intelligent 4-channel controller module for universal control tasks.

It can be used for:

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

in:

• General mechanical equipment manufacture
• Plant construction
• Industrial furnaces
• Heating and cooling systems
• Food industry
• Rubber and plastics machines
• Chemical and process engineering
• Glass and ceramics industry
• Wood and paper industry

The FM 355 is offered in two designs:

• FM 355 C as a continuous-action controller with 4 analog outputs for controlling analog actuators
• FM 355 S as a step or pulse controller with 8 digital outputs for controlling motor-driven (integrating) actuators or binary controlled actuators (e.g. electrical heating strips and cartridges).

The FM 355 can be used in the SIMATIC S7-300 and ET 200M with S7-300/400 as DP master.

• User-friendly wiring:
  Encoders and actuators are connected via two separate 20-pin front connectors.
• LEDs:
  • Red LED for displaying faults (group fault)
  • Green LEDs for digital input status display
  • Yellow LED for indicating backup operation
• High-performance measured data acquisition:
  The module has 4 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 355 C: 4 analog outputs for analog actuators
  • FM 355 S: 8 digital outputs for motorized actuators or binary controlled actuators. The 24 V DC supply for the actuators is applied externally.

Configuring package

The configuring package supplied on CD contains:

• Standard function blocks for exchanging data with the CPU
• Parameterization screen forms
• Getting Started – A short guide to startup
• Manual

The FM 355 has 4 separate closed-loop control channels. The controllers display the following features:

• Standard control structures (depending on the control structure selected, a number of different types of control may be interconnected in a single structure):
  • Fixed setpoint control,
  • Cascade control,
  • Ratio control,
  • 3-component control.
• Choice of modes:
  Automatic, manual, safety mode, follow-up mode and backup mode.
• Sampling time (depending on the resolution of the analog inputs and the compensation input):
  • For 12 bits:20 ms to 100 ms.
  • For 14 bits: 100 ms to 500 ms (depending on the number of enabled analog inputs)
• 2 control algorithms
  Self-optimizing temperature algorithm (see below), 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. The “backup mode” function is used to set a parameterizable safety setpoint or a parameterizable safety control variable.
• Disturbance variable input:
  the analog inputs can be used for feedforward compensation in addition to actual value acquisition, if desired.

New:

• Wider range of applications thanks to changes in function blocks.
  New function blocks are widening the possible applications for the module. The most important changes are:
  • All Fuzzy temperature controller parameters can be read out and programmed
  • More module parameters can be modified online
  • Comparison of data between the FM and instance DB
  • Significantly faster operation thanks to communication via I/O accesses instead of via SFC RD_REC and WR_REC
• Manual/Automatic changeover
  • Manual/automatic changeover stepless or with a step change, as required
• Higher measurement range resolution for Pt 100 sensors.
  The following measurement ranges can be parameterized:
  • -200 to +129°C or -328 to +264°F
  • -200 to + 556°C or -328 to +1032°F
  • -200 to +850°C or -328 to +1562°F
• Testing functions;
  Enhanced test functions support:
  • Reading of analog and digital inputs
  • Forcing of simulated values for analog and digital inputs
  • Reading of channel-specific parameters
• Firmware update
  • Fast and easy upgrading to the current firmware version via the Internet with the help of the parameterization software

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 supplied with the FM 355 that contains all the parameterization screen forms required for parameter initialization and startup.

Detailed online Help is available for all screen form screen forms. The parameterization screen forms are called up from STEP 7 following installation.