FM 450-1 counter module Siemens

Область применения

The FM 450-1 is the intelligent, single-channel counter module for simple counting tasks. It can be used in the SIMATIC S7-400.

Applications include:

• Assembly and handling equipment
• Plastics machines
• Production machines
• Paper machines
• Textiles machines
• Packaging machines

Обзор

• Two-channel intelligent counter module for simple counting tasks
• For direct connection of incremental encoders
• Comparison function with 2 specifiable comparison values
• Integrated digital outputs for outputting the response when the comparison values are reached

Note

SIMODRIVE Sensor/Motion Connect 500 feature incremental encoders and preassembled connecting cables for counting and positioning functions.

http://www.siemens.com/simatic-technology

Дизайн

The FM 450-1 supplies power for the encoders.

The module is characterized by the following mechanical features:

• Compact configuration:
  The rugged plastic housing contains:
  • Fault LEDs (INTF/EXTF)
  • LEDs to indicate the counter is running (CR), and the counting direction (DIR)
  • LEDs for digital input and output modules
  • Front connector as on the signal modules
  • Labeling area on the front cover.
• Easy installation:
  The module is simply mounted in the rack and screwed tight. It can be fitted with a coding element in the front connector.
• User-friendly wiring:
  The module is wired by means of a plug-in front connector. When the connector is plugged in for the first time a coding element in the module engages, so that the connector can only be plugged into modules of the same type. When the module is replaced, the front connector can be used in its fully wired state for the new module of the same type.

Configuring package

The configuring package required for configuration comprises:

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

Функции

The module off-loads the CPU by:

• Direct connection of one incremental encoder per channel
• Direct connection for gate signals (light barrier, etc.) using integrated digital inputs
• A comparison function and output of response via integrated digital output modules

The following functions are provided:

• Two channels for upcounting and downcounting; each 32-bit
• Counting frequency up to 500 kHz (RS 422 encoders)
• Counting range 0 to 32 bit or ±31 bit, as desired
• One-time or periodic counting process
• Single, double or quadruple evaluation
• Can be connected to incremental encoders; e.g., initiators, 24 V encoders or RS 422 encoders (5 V)
• Gate control via levels
• Setting via the digital input
• Counter can be loaded with a predefined starting value
• Comparison function using two user-definable reference values
• Interrupt response when a reference value is reached, zero crossing, range overrun (selectable)
• Output signal (24-V level), controlled by the comparison functions: with jointly specifiable pulse duration or as a continuous signal from the comparison value to the limit of the counting range.

Mode of operation

The FM 450-1 counter module detects pulses from incremental encoders at up to 500 kHz, as a function of directly connectable gate signals. It analyzes the direction of the pulses and compares independently on each channel the respective actual values with two specifiable comparison values.

There are two possibilities available to output the reaction to the process:

• Digital outputs:
  These can be configured via a common register with a selectable minimum pulse or with level switching.
• Backplane bus:
  the FM 450-1 can send an interrupt to the CPU via the integrated backplane bus.

Parameterization

Parameters are assigned with STEP 7 taking into account the parameterization screen forms. A configuring package is available for this purpose.

Технические данные

Дальнейшая информация

Brochures

Information material for downloading can be found in the Internet:

http://www.automation.siemens.com/infocenter