Siemens S7-300 FM 352 offers a cost-effective alternative cam controllers

Overview

  • Extremely high-speed electronic cam controller
  • Low-cost alternative to mechanical cam controllers
  • 32 cam tracks, 13 onboard digital outputs for direct output of actions
  • Incremental or synchro-serial position decoding

Note:

SIMODRIVE Sensor/Motion Connect 500 feature position-measuring systems and preassembled connecting cables for counting and positioning functions.

Product No. / Product DescriptionOrdering data
6ES7352-1AH02-0AE0
SIMATIC S7-300, FM 352 ELECTRON. CAM-OPERATED CONTROL INCL. CONFIG. PACKAGE ON CD


Application

Even in the lower performance range, the FM 352 offers a cost-effective alternative cam controllers.

The FM 352 can be used:

  • On conveyor belts;
    the FM 352 captures the positions of parts via light barriers and then initiates actions (e.g., drilling, milling, applying adhesive) via setpoint-dependent setting of outputs
  • For press automation (metal, powder, glass).

DesignFM 352 cam controllers

A controller with the FM 352 features the following essential components:

  • FM 352:
    • For position-dependent control commands by setting of outputs
  • S7-300 CPU:
    • For sequence control
    • For starting and stopping cam processing
    • For transferring cam data
    • For evaluating cam tracks
  • Programming device:
    • For programming the STEP 7 program
    • For the parameterization of the FM 352 with the configuring software integrated in STEP 7
    • For testing and startup
  • Operator panel:
    • For operator control and monitoring of the machine
    • For error diagnostics

FM 352 and CPU are linked via technology blocks.


Function

  • 32 cam tracks:
    13 leading directly to onboard digital outputs
  • Configurable number of cams:
    Depending on programming 32, 64 or 128 cams are available.
  • Configurable cam characteristics:
    Cams can be defined as position-based cams or time-based cams. They can be programmed direction-dependent (up/down).
  • Parameterizable assignment of cams to digital outputs:
    Track outputs 0 and 1 can be parameterized as counter cam tracks and track output 2 can be parameterized as a brake cam track.
Special functions
  • Longitudinal measuring
  • Set reference point
  • Set actual value
  • Set actual value on-the-fly
  • Zero offset
  • Change cam edges
  • Simulation mode
Mode of operation

The ultra-high-speed FM 352 electronic cam controller uses a sensor to detect axis positions and then triggers control commands by setting onboard outputs.

After the transfer of machine and cam data, the FM 352 works autonomously. Only control and checkback signals are then exchanged between the CPU and the FM 352.

The electronic cam controller works particularly fast:

  • 13 digital outputs for cam tracks:
    For rapid transmission of control signals to the process
  • Speed-dependent dynamic shifting for each cam:
    For automatic compensation of the dead time of the actuator connected at the time

The machinery to be controlled can be connected directly to the module. Control relays are only required for actuators with high current consumption.


Technical specifications

Article number

6ES7352-1AH02-0AE0

FM352 ELECTRON. CAM-OPERATED CONTROL

Supply voltage

Rated value (DC)

  • ● 24 V DC

Yes

Input current

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

200 mA

from backplane bus 5 V DC, max.

100 mA

Encoder supply

5 V encoder supply

  • ● 5 V

Yes

  • ● Output current, max.

300 mA

  • ● Cable length, max.

32 m

24 V encoder supply

  • ● 24 V

Yes

  • ● Output current, max.

300 mA

  • ● Cable length, max.

100 m

Power loss

Power loss, typ.

8.1 W

Digital inputs

Number of digital inputs

4

Functions

Reference point switch, set floating actual value/length measurement, brake release, enable track output no. 3

Input voltage

  • ● Rated value (DC)

24 V

  • ● for signal “0”

-30 to +5V

  • ● for signal “1”

+11 to +30V

Input current

  • ● for signal “0”, max. (permissible quiescent current)

2 mA

  • ● for signal “1”, typ.

9 mA

Digital outputs

Number of digital outputs

13

Functions

Cam track

Short-circuit protection

Yes

Output voltage

  • ● Rated value (DC)

24 V

  • ● for signal “1”, min.

UP – 0.8 V

Output current

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

5 mA; with UPmax

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

600 mA; with UPmax

  • ● for signal “0” residual current, max.

0.5 mA

Encoder

Connectable encoders

  • ● Incremental encoder (symmetrical)

Yes

  • ● Incremental encoder (asymmetrical)

Yes

  • ● Absolute encoder (SSI)

Yes

  • ● 2-wire sensor

Yes

  • — permissible quiescent current (2-wire sensor), max.

2 mA

Encoder signals, incremental encoder (symmetrical)

  • ● Trace mark signals

A, notA, B, notB

  • ● Zero mark signal

N, notN

  • ● Input voltage

5 V difference signal (phys. RS 422)

  • ● Input frequency, max.

1 MHz

Encoder signals, incremental encoder (asymmetrical)

  • ● Trace mark signals

A, B

  • ● Zero mark signal

N

  • ● Input voltage

24 V

  • ● Input frequency, max.

50 kHz; 50 kHz for 25 m cable length; 25 kHz for 100 m cable length

Encoder signals, absolute encoder (SSI)

  • ● Data signal

DATA, notDATA

  • ● Clock signal

CL, notCL

  • ● Telegram length, parameterizable

13 or 25 bit

  • ● Clock frequency, max.

1 MHz

  • ● Gray code

1

  • ● Cable length, shielded, max.

320 m; at max. 125 kHz

Potential separation

Potential separation digital inputs

  • ● Potential separation digital inputs

No

Potential separation digital outputs

  • ● Potential separation digital outputs

No

Degree and class of protection

Degree of protection acc. to EN 60529

  • ● IP20

Yes

Ambient conditions

Ambient temperature during operation

  • ● min.

0 °C

  • ● max.

60 °C

Ambient temperature during storage/transportation

  • ● min.

-40 °C

  • ● max.

70 °C

Connection method

required front connector

1x 20-pin

Dimensions

Width

80 mm

Height

125 mm

Depth

120 mm

Weights

Weight, approx.

550 g