SIEMENS S7-300, FM 350-1 counter module FOR SIMATIC S7-300

FM 350-1 counter module

  • One-channel intelligent counter module for simple counting tasks
  • For direct connection of incremental encoders
  • Comparison function with 2 specifiable comparison values
  • Integrated digital outputs to output the response upon reaching the comparison value.
  • Operating modes:
    • Continuous counting
    • One-shot counting
    • Periodic counting
  • Special functions:
    • Set counter
    • Latch counter
  • Start/stop counter with gate function

Note:

Incremental encoders and pre-assembled connecting cables for counting and positioning functions are offered under SIMODRIVE Sensor or Motion Connect 500.

Product No. / Product Description Listprice / Your price
6ES7350-1AH03-0AE0
SIMATIC S7-300, COUNTER MODULE FM 350-1 FOR S7-300, COUNTER FUNCTIONS UP TO 500 KHZ 1 CHANNEL FOR CONNECTION OF 5V AND 24V INCREMENTAL ENCODERS ISOCHRON MODE, MEASUREMENT MODE INCL. CONFIG. PACKAGE ON CD
Function

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.

Standard Function Blocks

CNT_CTRL (FC 0)

For controlling the counters of the FM 350-1

DIAG_INF (FC 1)

For providing the diagnostic information of the FM 350-1

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.

Operating Modes

Continuous counting

After the gate is enabled, endless counting takes place between the lower and upper count limit from the starting value

One-shot counting

After the gate is enabled, the system counts once from the starting value to the upper or lower limit depending on the main count direction

  • Main counting direction up: from 0 to the programmable range limit
  • Main counting direction down: from the programmable start value to 0

Periodic counting

After the gate is enabled, periodic counting takes place from the starting value within the programmed counting range depending on the main count direction

  • Main counting direction up: periodic from 0 to the programmed range limit – 1
  • Main counting direction down: periodically from the programmed start value to 1

Parameterization

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

Application

The FM 350-1 is the intelligent single-channel counter module for a wide range of basic counting tasks. It can be used in the SIMATIC S7-300 and in the ET 200M (with S7-300/-400 as master).

Applications include:

  • Assembly and handling equipment
  • Plastics machines
  • Production machines
  • Paper-making machines
  • Textile machines
  • Packaging machines
Design

The module provides the encoder supply.

It has the following mechanical features:

  • Compact configuration;
    The rugged plastic housing contains:

    • Fault LEDs (GF)
    • LEDs to indicate that the counter is running (CR) and the counting direction (DIR)
    • LEDs for digital input and output modules.
    • Slot for the front connector, protected by the front cover
    • 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 key, which assigns it permanently to a specific slot.
  • Coding connector (measurement range module for analog inputs) for selecting the type of encoder (5 V or 24 V)
  • 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:

  • “Getting Started” instructions
  • Manual
  • Parameterization screen forms
  • Standard function blocks for data exchange with the CPU
Technical specifications

Article number

6ES7350-1AH03-0AE0

SIMATIC S7-300, COUNTER MODULE

Supply voltage

Auxiliary voltage 1L+, load voltage 2L+

  • ● Rated value (DC)

24 V

  • ● permissible range, lower limit (DC)

20.4 V; Dynamic 18.5 V

  • ● permissible range, upper limit (DC)

28.8 V; dynamic 30.2 V

non-periodic skip

  • — Duration

500 ms

  • — Recovery time

50 s

  • — Value

35 V

Input current

from load voltage 1L+ (without load), max.

40 mA

from backplane bus 5 V DC, max.

160 mA

5 V encoder supply

  • ● 5 V

Yes; 5.2 V ±2 %

  • ● Output current, max.

300 mA

24 V encoder supply

  • ● 24 V

Yes; 1L+ (-3 V)

  • ● Output current, max.

400 mA

Power loss

Power loss, typ.

4.5 W

Digital inputs

Number of digital inputs

3

Functions

1 for gate start, 1 for gate stop, 1 for setting the counter

Input voltage

  • ● for signal “0”

-28.8 … +5V

  • ● for signal “1”

+11 to +28.8V

Input current

  • ● for signal “1”, typ.

9 mA

Digital outputs

Number of digital outputs

2

Short-circuit protection

Yes; Clocked electronically

Limitation of inductive shutdown voltage to

2L+ (-39 V)

Output voltage

  • ● for signal “0”, max.

3 V

  • ● for signal “1”, min.

2L+ (-1,5 V)

Output current

  • ● for signal “1” rated value

0.5 A

  • ● for signal “1” permissible range for 0 to 60 °C, min.

5 mA

  • ● for signal “1” permissible range for 0 to 60 °C, max.

0.6 A

Output delay with resistive load

  • ● “0” to “1”, max.

300 µs

Encoder

Connectable encoders

  • ● Incremental encoder (symmetrical)

Yes; With 2 pulse trains offset by 90°

  • ● Incremental encoder (asymmetrical)

Yes

  • ● 24 V initiator

Yes

  • ● 24 V directional element

Yes; 1 pulse train, 1 direction level

Counter

Number of counter inputs

1

Counting range, description

32 bit or ±31 bit

Minimum pulse width, adjustable

Yes; 2.5 or 25 µs

Counter input 5 V

  • ● Type

RS 422

  • ● Terminating resistor

220 Ω

  • ● Differential input voltage

1,3 V

  • ● Counting frequency, max.

500 kHz

Counter input 24 V

  • ● Input voltage for signal “0”

-28.8 … +5V

  • ● Input voltage for signal “1”

+11 to +28.8V

  • ● Input current for signal “1”, typ.

9 mA

  • ● Counting frequency, max.

200 kHz

  • ● Minimum pulse width

2.5 µs

Potential separation

Potential separation digital inputs

  • ● between the channels and backplane bus

Yes; Optocoupler

Potential separation digital outputs

  • ● between the channels and backplane bus

Yes; Optocoupler

Potential separation counter

  • ● between the channels and backplane bus

Yes; Optocoupler

Isolation

Isolation tested with

500 V

Connection method

required front connector

1x 20-pin

Dimensions

Width

40 mm

Height

125 mm

Depth

120 mm

Weights

Weight, approx.

250 g