PLC siemens2

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Date: 04.09.2013File: SYH_03E.1

SIMATIC S7Siemens AG 1999. All rights reserved.

Information and Training Center

Knowledge for Automation

Installation/Maintenance of a PLC



Date: 04.09.2013File: SYH_03E.2




Components for the Configuration of an S7-300

Components Function

Rail ... is the rack for an S7-300

Power Supply(PS)

... converts the supply voltage (120/230 V) to 24 V DC operationvoltage to supply the S7-300

Central Processing Unit(CPU)

... executes the user programaccessories: memory module, back-up battery

Interface Modules

(IM)... connect the bus between the racks (tiers)

Signal Modules (SM)

(Digital/Analog)

... adapt various process levels to the S7-300.accessories: bus connector, front connector

Function Modules (FM)... make functions for positioning, closed-loop control etc.

available

CommunicationProcessors (CP)

... for connections between programmable logic controllers.accessories: cable, software, interface modules



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Mounting Positions for an S7-300 Configuration



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Expansion Capabilities for an S7-300

Slotnumber 1 2 3 4 5 6 7 8 9 10 11

CPUIMS

FM localPS

PS IMR

IMRPS

IMRPS



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Installation Rules

For a horizontal configuration, the CPU and power supply must bearranged on the left. For a vertical configuration, the CPU and power supply must be arranged at the bottom

The following minimum clearances must be maintained:

20 mm to the right and left of the rack

40 mm above and below for a single-tier configuration and at least

80 mm between two racks

The interface module always occupies the space next to the CPU

There may be a maximum of eight I/O modules (signal modules,function modules, communication processors) inserted in a rack

A multi-tier configuration is possible only for the CPU 314/315/316

Please ensure that there is a low resistance connection between the railand the substructure, such as through contact washers.



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Installation

Installation Aids

Check listHardware manuals

Parts list

1. ................

2. .................3. ..................



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• Are all the components available ? (see parts list)

• Install the rail !

• Install the power supply !

• Connect a bus connector to the CPU and install the module !

• Connect a bus connector to each of the I/O modulesand install the modules !

• Connect the front connectors and insert the labelling stripsand the slot number !

• Wire the modules (power supply, CPU and I/O modules)

Installation Check List



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Installing the Rail (Part 1)

482 mm

530 mm830 mm

57.2mm

466 mm500 mm800 mm

• Screw the rail to the substructureusing M6 screws !

Protective ground connection

• Connect the protective ground conductor to therail (protective ground screw) !Note: Minimum cross section of the cable = 10mm2.



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Installing the Rail (Part 2)

Rail

Bus connector

Hold-down screw



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Check List for Electrical Configuration

1. Are analog signals or bus signalsused?

2. Do cables with > 60V exist?

3. Are inductances switched by additionalcontacts in the output circuit or independent of the programmablelogic controller?

4. Will cables be laid outside of buildings?



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Wiring the Front Connector

Open the front door of the signal modules !

Bring the front connector into wiring position !

Thread the strain reliever in the front connector !

Strip the insulation from the wires (6 mm length) !

Connect the wires ! Tighten the strain relief for the cable loom !

Position the front connector in the operating position !

Close the front door !

Fill out the labeling strip and insert it in the front door !

Attach the slot number to the front door !



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Preparing for Operation

Insert the keyswitch in the CPU !

Install the back-up battery !

if the user program is not stored in a power failure-proof way in the memory module

if larger data areas must remain retentive during apower failure

Insert the memory module if required !

so that the user program and the data are retainedduring Power OFF and without a back-up battery

to have a larger "load memory" available.



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Exercise: Using the Manual. Configuration of an S7-300



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Exercise: Installing the Modules

Dismantle the modules in slots 8-9 (Version A) or 4-5 inVersion B !

Install the input module in slot 8 (4) and the outputmodule in slot 9 (5)!

Check whether you can switch the front connector between the input module and the output module(interchange protection) !

Connect a new front connector on both the digital inputand digital output module and bring them into wiringposition!



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Exercise: Wiring the Signal Modules

Term.No.: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

S1 S4 H4 L- L+

conveyor model

modules 16 channel ->

32 channel ->

I 17.1 I 17.4 Q 21.1 L- L+

(I 3.1) (I 3.4) (Q 7.1)

L+ L+ L-

To supply the input/output modules

(see manual or the labelon the front door of the modules)



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Installing an S7-400



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Components of an S7-400

Components Function

Rack for receiving and establishing an electricalconnection to the modules

Power Supply(PS)

converts the supply voltage to 5V DC and 24V DCto supply the modules

Central Processing Unit(CPU)

executes the user programaccessories: Memory Card

Interface Modules

(IM)

connect the racks with one another.accessories: connector cables, terminators

Signal Modules (SM)

(Digital/Analog)

adapt various process signals to the S7-400.accessories: front connector

Function Modules (FM)

make functions available for positioning, closed-loop control

etc.

CommunicationProcessors (CP)

for connections between programmable logic controllers.accessories: cable, software, interface modules



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Racks and Connection Possibilities

Type of Rack Centralrack

Extensionrack

Useable in

UR1 / UR2(Universal Rack)

Yes Yes

P bus

K bus

CR2(Central Rack)

NoYes

P bus, Segment 1

K bus

P bus, Segment 2

P bus

ER1 / ER2

(Extension Rack) No Yes



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Installation Rules

The following minimum clearances must be maintained:

20 mm to the right and left of the rack

40 mm above and 22 mm below the rack

110 mm between two racks

The power supply must be inserted on the far left (slot 1) and

the receive IM must be inserted on the far right Please ensure that there is a low-resistance connection

between the rack and substructure, such as through contactwashers

Connect the rack to building ground with at least 10 mm2

Remove the slot covers before you install the modules



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Installation Check List

• Are all components available? (see parts list)

• Install the rack !

• Install the power supply !

• Remove the slot covers and install the modules !

• Connect the front connectors and insert thelabeling strips !

• Wire the modules (power supply and I/O modules) !



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Installing Racks

Screw the rack to the substructure (M6 machine

screws) !

Connect the rack to building ground. A stud bolt is

provided on the lower left for this purpose. Theminimum cross section of the cable is 10 mm2 !

Install additional racks with a minimum clearance of

110 mm !



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Installing Modules

Remove the slot covers.Grasp the cover at the indicated locations and pull thecover forward to remove it !

Hang in the first module and swing it down !

Screw the module tight on the top and the bottom.Three-fold modules and the power supply each havetwo screws on the top and on the bottom !

Install the other modules as before !



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Wiring the Power Supply

Open the power supply cover !

Adjust the power selection switch to the correct supply voltage !

User a screw driver as a lever to loosen the power plug !

Pull out the power plug !

Shorten both wires (not PE) by 10 mm !

Strip the insulation to a length of 7 mm !

Open the power plug (screw in the cover) and the strain relief device !

Connect the wires and tighten the strain relief device !

Close the power plug cover !

Push the power plug into the guide notch on the power supply andthen to a dead stop !



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Wiring the Front Connector

Use a lever motion on the lower part of the front connector cover toloosen it. Open the cover and pull it up to remove it !

Strip the insulation from the wires !

Connect the wires !

Install the strain relief device on the lower side of the front connector !

Fill out the labeling strip and insert it in the front connector !

Place the cover on the front connector !

Latch the front connector onto the module‘s coding key !

Swing the front connector up !

Screw the front connector tightly in place !



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Preparing for Operation

Insert the keyswitch in the CPU !

Insert the back-up battery (batteries) !

Adjust the BATT INDIC switch for monitoring thebattery on the power supply !

Insert the memory card in the CPU !(always required for the S7-400)

Connect the racks using the correct connector cables !

Set the rack number (1 to 21) on the coding key of every receive IM !

Connect a terminator to the last receive IM of everycoupling phase !

Perform a CPU memory reset !

Connect the programming device !



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Maintaining the Programmable Logic Controller



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Changing the Back-up Battery in the S7-300



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Exchanging Signal Modules in the S7-300

Switch the CPU to Stop !

Switch the load voltage off !

Open the front door !

Release the front connector and take it out !

Loosen the hold-down screw on the module !

Swing the module out ! On the new module, remove the upper portion of the front

connector coding !

Insert the new module and screw it down tightly !

Connect the front connector and bring it into operatingposition !

Close the front door !

Switch the load voltage on again !

Perform a complete restart on the CPU !



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Changing the Fuse in Digital Output Modules of the S7-300

Switch the CPU to Stop !

Switch the load voltage off !

Remove the front connector !

Loosen the hold-down screw on the module !

Swing the module out ! Screw the fuse support out of the module !

Change the fuse !

Screw the fuse support down again tightly !

Install the module !

Insert the front connector !

Switch the load voltage on again !



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Changing the Back-up Battery in the S7-400

Open the power supply cover !

Use the ribbon loop to pull the battery (batteries) out of the batterycompartment !

Insert the new battery and pay attention to the battery‘s polarity !

Set the BATTINDIC switch for battery monitoring:

BAT position for a single-width power supply

1BAT position for a double or triple-width PS and one battery

2BAT position for a double or triple-width PS and two batteries

Use the FMR acknowledgement pushbutton to cancel the error

message !

Close the cover to the power supply !



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Exchanging Signal Modules in the S7-400

Switch the CPU to Stop or make sure that the user program permitsmodules to be exchanged in the RUN state !

Loosen the hold-down screws of the front connector and remove thefront connector !

Loosen the hold-down screw on the module and swing the module out !

Hang in the new module and swing it down !

Use both screws to screw the module down tightly !

Remove the front part of the coding key in the front connector !

Connect the wired front connector and tighten it !

Switch the CPU to RUN ! (if it was switched to STOP)

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PLC siemens2