The FM 350-1 off-loads the CPU by:

• Direct connection of incremental encoders
• Direct connection for gate signals (light barrier etc.) using integrated digital inputs.
• A comparison function and output of response using integrated digital output modules.

The following functions are provided:

• 1 channel for upcounting and downcounting; 32 bit
• Counting frequency up to 500 kHz (RS 422 encoders)
• Counting range 0 to 32 bit or +/- 31 bit, as required
• One-shot or periodic counting process
• 1-, 2- or 4-fold evaluation
• Incremental encoder can be connected
• Gate control via levels, pulses or software control
• Setting via the digital input
• Counter can be loaded with a predefined starting value
• Comparison function using two selectable comparison values
• Interrupt response when a comparison value is reached, zero crossing, range violation (selectable)
• Output signal (24 V-level) that the comparison function controls: With jointly selectable pulse duration or as a continuous signal from the comparison value to the limit of the counting range.
  

Mode of operation

The FM 350-1 counter module detects pulses from incremental encoders at up to 500 kHz, as a function of directly connectable gate signals.

• It evaluates the direction of the pulses and compares the actual value with two comparison values, which can be preset.There are two possibilities available to output the reaction to the process:
  • 2 digital outputs;
    they can be configured using the selectable minimum pulse or with level switching.
  • Backplane bus;
    the FM 350-1 can send an alarm signal to the CPU via the integrated backplane bus.
    

Parameterization

Parameters are assigned with STEP 7 with the help of parameterization screen forms. A configuring package is available for this purpose.