FM 451 positioning module

Заказные данные
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Аксессуары
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Three-channel positioning module for rapid/slow-action drives
4 digital outputs per channel for motor control
Displacement measurement incremental or synchronous-serial

Note

Displacement measuring systems and precut/preassembled cables for counting and positioning functions are available under SIMODRIVE Sensor or Motion Connect 500.

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

Область применения

The FM 451 three-channel positioning module handles the adjustment of mechanical axes in the case of rapid-traverse and creep-speed drives. The module is intended for the positioning of adjusting and setup axes, preferably with standard motors, controlled via contactors or frequency converters.

The module is used in:

Packaging machines
Lifting gear and conveying equipment
Woodworking machinery
Paper and printing machinery
Rubber- and plastics-processing machines

Дизайн

A positioning controller with the FM 451 features the following essential components:

FM 451:
- For positioning three independent axes
S7-400 CPU:
- For sequence control
- For starting and stopping positioning actions
Programming device:
- For programming the STEP 7 program
- For parameterizing the FM 451 with STEP 7 via parameterization screen forms
- For testing and startup
Operator panel:
- For operator control and monitoring of the machine
- For error diagnostics

The connection between the FM 451 and the CPU is established by means of technology blocks.

Функции

Positioning functionality

Setup:
Move the rapid-traverse or creep-speed axis into position at the touch of a button (jog mode).
Absolute incremental feed:
The axis is moved to an absolute target position. The numerical values are stored in a table on the FM 451.
Relative incremental feed:
The axis is moved through a set route.
Reference point motion:
For synchronization after the PLC has been turned in when using incremental position encoders.

Special functions

Set actual value
Set reference point
Delete distance to go

Mode of operation

Preparatory steps for a positioning task:

Coordination of mechanical system and electronics:
Easily achieved by entering machine data.
Specify target position(s) via the S7 CPU or configuration software
Transfer the interface signals from the CPU to the FM 451 (start, stop)

The FM 451 handles the actual positioning:

4 digital outputs controlling the rapid-traverse, creep-speed, counterclockwise and clockwise functions are assigned to each channel.
Creep speed or rapid-traverse/creep speed is specified depending on the distance to the target.
After the cutoff point is reached, the module monitors the target approach. After the target area is reached, a signal is sent to the CPU.

Технические данные

Order number		6ES7451-3AL00-0AE0
		SIMATIC S7-300, FM 451
Supply voltage
Rated value (DC)		24 V
Input current
Current consumption, typ.		550 mA
Encoder supply
5 V encoder supply
● 5 V		Yes
● Output current, max.		210 mA
● Cable length, max.		35 m; at max. 210 mA
24 V encoder supply
● 24 V		Yes
● Output current, max.		300 mA
● Cable length, max.		100 m; at max. 300 mA
Absolute encoder (SSI) encoder supply
● Absolute encoder (SSI)		Yes
● Type of output voltage		24 V DC
● Output current, max.		300 mA
● Cable length, max.		300 m; At max. 156 kbit/s
Power loss
Power loss, typ.		3.6 W
Digital inputs
Number of digital inputs		12; 4 per axis
Functions		Reference cams, reversing cams, flying actual value setting, start/stop positioning
Input voltage
● Rated value (DC)		24 V
● for signal "0"		-30 to +5V
● for signal "1"		+11 to +30V
Input current
● for signal "1", typ.		9 mA
for 2-wire sensor
— for signal "1", typ.		30 mA
Digital outputs
Number of digital outputs		12; 4 per axis
Functions		Rapid traverse, creep, run right, run left
Short-circuit protection		Yes
Output voltage
● for signal "1", min.		UP -3 V
Output current
● for signal "1" permissible range for 0 to 55 °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
Encoder signals, incremental encoder (symmetrical)
● Trace mark signals		A, notA, B, notB
● Zero mark signal		N, notN
● Input signal		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; for 25 m cable length, 25 kHz for 100 m cable length
● Cable length, shielded, max.		100 m
Encoder signals, absolute encoder (SSI)
● Input signal		5 V difference signal (phys. RS 422)
● Data signal		DATA, notDATA
● Clock signal		CL, notCL
● Telegram length, parameterizable		13 or 25 bit serial
● Clock frequency, max.		1.25 MHz
● Gray code		1
● Cable length, shielded, max.		300 m; At max. 156 kbit/s
Potential separation
Potential separation digital inputs
● Potential separation digital inputs		Yes
Potential separation digital outputs
● Potential separation digital outputs		Yes
Degree and class of protection
Degree of protection acc. to EN 60529
● IP20		Yes
Ambient conditions
Ambient temperature during operation
● min.		0 °C
● max.		55 °C
Ambient temperature during storage/transportation
● min.		-40 °C
● max.		70 °C
Relative humidity
● Humidity class F		Yes
Connection method
required front connector		1x 48-pin
Dimensions
Width		50 mm
Height		290 mm
Depth		210 mm
Weights
Weight, approx.		1 300 g