configuring siemens s7-300 plc with moxa mgate 4101 · pdf file7. click ok. mgate 4101-mb-pbs...

Copyright © 2014 Moxa Inc. Released on December 26, 2014

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Configuring Siemens S7-300 PLC with Moxa MGate 4101-MB-PBS

Moxa Technical Support Team [email protected]

Contents 1 Application Description ................................................................... 3

1.1 Objective ................................................................................................. 3

1.2 Goals ....................................................................................................... 3

2 System Topology ............................................................................. 3

3 Hardware and Software Requirements ........................................... 4

4 Configuration .................................................................................. 5 4.1 Hardware Installation ................................................................................. 5

4.2 PowerFlex 4M Settings ............................................................................... 6

4.3 IAQPoint2 Settings .................................................................................... 7

4.4 MGate 4101-MB-PBS Settings ..................................................................... 7

5 Configuring Siemens PLC .............................................................. 12 5.1 Creating the STEP 7 project .......................................................................12

5.2 Inserting a Station ...................................................................................13

5.3 Configuring Hardware ...............................................................................14

5.4 Creating a PROFIBUS network....................................................................17

5.5 Installing the GSD file ...............................................................................20

5.6 Configuring the PROFIBUS Slave ................................................................22

5.7 Configuring I/O Modules ............................................................................23

5.8 Editing Symbols .......................................................................................24

5.9 Configuring Ethernet Nodes .......................................................................25

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Moxa Tech Note Configuring Siemens S7-300 PLC with Moxa MGate 4101-MB-PBS

Copyright © 2014 Moxa Inc. of 35

5.10 Downloading Configuration ........................................................................25

6 Step 7 Ladder Programming ......................................................... 27 6.1 Editing OB1 .............................................................................................27

7 Communication Test: Monitor Program ......................................... 31

8 Appendix ....................................................................................... 32 8.1 PowerFlex 4M Modbus Registers .................................................................32

8.2 IAQPoint2 Modbus Registers ......................................................................35



1 Application Description

1.1 Objective This document describes an application using Siemens PLC with MGate 4101-MB-PBS.

In this application, Siemens PLC is used to get input data that MGate 4101-MB-PBS polls from the

temperature meter through Modbus Register. Siemens PLC evaluates the temperature value and

outputs data to MGate 4101-MB-PBS, which then uses the data to control speed.

1.2 Goals In this document, you will learn the following:

• Configure Siemens PLC.

• Configure MGate 4101-MB-PBS to communicate with a Modbus RTU device.

• Set up MGate 4101-MB-PBS in SIMATIC Step 7.

• Create a basic Step 7 Ladder Programming.

• Industrial field applications and the job of each role.

2 System Topology

The following figure shows a system architecture in which the Modbus end devices, PowerFlex 4M and IAQPoint2, are connected to the serial port on MGate 4101-MB-PBS

through RS-485-2W wiring. MGate 4101-MB-PBS is connected to the PROFIBUS port on

Siemens PLC via a PROFIBUS cable. PC (running SIMATIC Step 7) is connected to an Ethernet

switch port on Siemens PLC via an Ethernet cable. A fan is connected to PowerFlex 4M, which

powers the fan.



3 Hardware and Software Requirements

Siemens SIMATIC S7-300 PLC − Processor: CPU 315-2 PN/DP

− Article Number: 6ES7315-2EH14-0AB0

− Version:3.2.7

MGate 4101-MB-PBS − Firmware Version: Ver1.3_Build_14031018

− EDS File: MPBS0D80.gsd

PowerFlex 4M PowerFlex 4M is an adjustable frequency AC drive that is used to drive the fan in this

application.

IAQPoint2 IAQPoint2 is an indoor air quality monitor. It can detect CO2, temperature, and humidity

PC (SIMATIC Step 7)

MGate 4101-MB-PBS

Power Flex 4M IAQPoint2

Information Level

Control Level

Device Level

Fan

Ethernet

PROFIBUS

RS-485-2W

Siemens S7 PLC

CPU 315-2 PN/DP



levels.

SIMATIC Step7 Siemens PLC Engineering Software released by Siemens AG.

− Version : V5.5+SP3

MGate Manager Software utility to configure a Moxa MGate device.

− Version : 1.9

4 Configuration

4.1 Hardware Installation PowerFlex 4M and IAQPoint2 Connection

− RS-485-2W wiring

− Pin assignment

4 5

3

4

5 6

Modbus Port



PLC Connection

4.2 PowerFlex 4M Settings Serial Port Settings

− Baudrate: 38400

− Set on panel: Command C302 (Comm Data Rate), option 5

Options 0“1200”

1“2400”

2“4800”

3“9600” (Default)

4“19.2K”

5“38.4K”

− Data bit, Parity, Stop bit :8-E-1

− Set on panel: Command C306 (Comm Format), option 1

Options 0“RTU 8-N-1” (Default)

1“RTU 8-E-1”

2“RTU 8-O-1”

3“RTU 8-N-2”

4“RTU 8-E-2”

5“RTU 8-O-2”

PC (SIMATIC Step 7) MGate 4101-MB-PBS

Siemens S7 PLC

CPU 315-2 PN/DP

PROFIBUS Cable Ethernet Cable



Programmable Settings − Start Source: Modbus port

− Set on panel: Command P106 (Start Source), option 5

Options 0 “Keypad” (Default)

1 “3-Wire”

2 “2-Wire”

3 “2-W Lvl Sens”

4 “2-W Hi Speed”

5 “Comm Port”

− Speed Reference: Modbus port

− Set on panel: Command P108 (Speed Reference), Option 5

Options 0 “Drive Pot” (Default)

1 “InternalFreq”

2 “0-10V Input”

3 “4-20mA Input”

4 “Preset Freq”

5 “Comm Port”

− Modbus Slave ID Setting: 100 (default)

4.3 IAQPoint2 Settings Serial Port Settings Use the touch panel (the default access password is 2967) to configure the following

settings for the serial port:

− Baudrate: 38400

− Parity: Even (Default)

− Address (Slave ID): 1 (Default)

4.4 MGate 4101-MB-PBS Settings Assigning a PROFIBUS Address Before a PROFIBUS slave can communicate with a PROFIBUS master, you must assign an

address to the PROFIBUS slave. Make sure that you assign the same address that you set



in the STEP 7 project.

You can use the rotary switch (as shown in the following figure) to set an address that is

between 0 and 99. To assign an address larger than 99, use the MGate Manager.

Device Configuration Using MGate Manager This section shows you how to configure MGate 4101-MB-PBS.

1. Connect a COM port on PC to the serial console on MGate 4101-MB-PBS.



2. Start MGate Manager and search for the device.

3. Select the target device and click Configuration.



4. Select the Modbus tab and configure the fields as shown in the following figure.



5. Select the PROFIBUS tab. The screen displays the address value that you set using

the rotary switch.

6. Select the IO Mapping tab and configure the fields as shown in the following figures.

− Modbus Commands

Note: For more information on Modbus registers for PowerFlex and IAQPoint 2, refer to

the appendix.



− IO Module

7. Click OK.

MGate 4101-MB-PBS automatically restarts to make the changes take effect.

5 Configuring Siemens PLC

Follow the procedures in this section to configure Siemens PLC.

5.1 Creating the STEP 7 project Start SIMATIC Manager and create a new project. Click File > New. Then, set the project

name in the Name field and click OK.



5.2 Inserting a Station In SIMATIC Manager, click Insert > Station and select to insert SIMATIC 300 Station

into the project.



5.3 Configuring Hardware 5.3.1 Adding a Rack 1. In SIMATIC Manager, double-click Hardware.

2. The HW Config screen appears. Click Insert > SIMATIC 300 > RACK > Rail to

insert the rack object



The following figure shows the HW Config screen after adding the rack object.



5.3.2 Adding a CPU

You must add the appropriate CPU module to the STEP7 project based on the actual

hardware model. In this example, CPU 315-2 PN/DP is the hardware model.

In the HW Config screen, drag the selected CPU module to the table.

The following figure shows a screen example after adding the CPU module.



5.4 Creating a PROFIBUS network 1. Double-click MPI/DP to configure the PROFIBUS DP module.

2. In the Properties screen, in the Interface area, select PROFIBUS from the Type

drop-down list box and click Properties.



3. Click the Parameters tab to set the address for the PROFIBUS master. Select a value

from the Address drop-down list. Then, click New to create a new subnet.

4. In the Network Settings tab, select an option for the Transmission Rate setting and

select DP for the Profile setting; then, click OK.



5. In the Operating Mode tab, select the DP master operating mode and click OK.



The following figure shows an example screen that indicates that the PROFIBUS network is

configured successfully.

5.5 Installing the GSD file For engineering and configuration purposes, you must install a device GSDML file using the

SIMATIC Manager.

1. In the HW Config screen, click Options > Install GSD File.



2. In the Install GSD Files screen, click Browse to navigate to the folder and select the

GSDML file for the Moxa PROFINET device. Then, click Install and Close.



If the GSD file is installed successfully, the system displays Moxa PROFBUS Slave in the

hardware catalog list.

5.6 Configuring the PROFIBUS Slave 1. In the HW Config screen, select and drag the Moxa Profibus Slave device to DP

master system.

2. Right-click Moxa Profibus Slave and select Object Properties.

3. In the Parameters tab, you can configure the PROFIBUS address of the Moxa device.

Note: Make sure that the address is the same address that you set using the rotary switch

on the PROFIBUS slave.



5.7 Configuring I/O Modules You can configure the selected I/O modules for data exchange with the PROFIBUS master.

You can select the I/O module combinations based on your application. This example uses

the two 1 Word output and one 1 Word input IO combination

1. Drag the Output: 1 Word module from the module list for Moxa PROFINET slave to slots 1 and 2.

2. Drag the Input: 1 Word module to slot 3.

3. Save the changes.



5.8 Editing Symbols 1. Right-click slot 1 entry and select Edit Symbols.

2. Set the Symbol field as QCMD and set the Comment field as Output Logic

Command.

3. Edit the symbols for slots 2 and 3 as shown in the following figures.



5.9 Configuring Ethernet Nodes Before you can download the configuration to CPU 315-2 PN/DP, specify the Ethernet

settings on CPU 315-2 PN/DP to communicate with PC.

To change the IP address of CPU 315-2 PN/DP, double-click PN-IO. Then, click Properties

and specify the network settings (IP address and subnet mask).

The following figure shows an example.

5.10 Downloading Configuration To download the configuration to CPU 315-2 PN/DP, click the Download to Module icon.



Siemen PLC starts to communicate with MGate 4101-MB-PBS. The P2 Status LED

(PROFIBUS) on MGate 4101-MB-PBS turns steady green to indicate that the device is in

data exchange mode.

6 Step 7 Ladder Programming

6.1 Editing OB1 1. In SIMATIC Manager, click S7 Program->Blocks and double-click OB1.

As a Program Cycle Organization Block, OB1 is executed at regular intervals by the S7

CPU operating system after the startup process is complete.



The following screen appears.

2. Drag and drop the MOVE instruction to Network 1. Then, set the ITemperature

input to the IN node and the input MW0 memory variable to the OUT node.

The logic comment for Network 1 is “Copy temperature value to MW0.” as shown in the

following figure.



3. Complete the following steps to configure Network 2:

a. Click Insert > Network to insert Network 2.

b. Drag and drop the MOVE instruction to Network 2. Then, set the 2 input to the

IN node and the QMD input symbol to the OUT node.

The logic comment for Network 2 is “Output 2 (Start Mode) to "Logic Command" word.”

as shown in the following figure.



b. Drag and drop the GE_I instruction to Network 3. Then, set the MW0 input to the

IN1 node and the 250 input to the IN2 node.

c. Drag and drop the Move instruction to Network 3. Then, set the 600 input to the

IN node and the QSpeed input symbol to the OUT node

The logic comment for Network 3 is “If Temperature is greater than 25C, output drive

speed as 60 MHz.” as shown in the following figure.





b. Drag and drop the GE_I instruction to Network 4. Then, set the MW0 input to the


c. Drag and drop the LI_1 instruction to Network 4. Then, set the MW0 input to the


d. Drag and drop the MOVE instruction to Network 4. Then, set the 500 input to the

IN node and the QSpeed input symbol to the OUT node.

The logic comment for Network 4 is “If Temperature is between 24.5~25C,output drive

speed as 50 MHz.” as shown in the following figure.



The following table shows the logic of Network 3~9.

Network Temperature (C ) Drive Speed (MHz.)

>= <

3 250 - 60

4 245 250 50

5 240 245 40

6 235 240 30

7 230 235 20

8 225 230 10

9 - 225 0

6. Click Download to download the program to Siemen PLC.

7 Communication Test: Monitor Program

In the OB1 program, click Debug > Monitor.



In the following example, the title bar indicates the program status (ONLINE).

The status bar indicates the Siemen PLC status (RUN). The temperature is 23.1 C and the output

speed is 20MHz for Network 7.

8 Appendix

8.1 PowerFlex 4M Modbus Registers Logic Command Register

− Address: 8192

− Access: R/W

− Value:

Bit(s) Description

0 1 = Stop, 0 = Not Stop

1 1 = Start, 0 = Not Start

Reference Register: Setting Speed − Address: 8193

− Access: R/W

− Value: A decimal value entered as xxx.x where the decimal point is fixed. For example,

a decimal of 100 equals to 10.0 Hz and 543 equals to 54.3 Hz.



Logic Status Register − Address: 8448

− Access: R

− Value:

Bit(s) Description

0 1 = Ready, 0 = Not Ready

1 1 = Active (Running), 0 = Not Active

2 1 = Cmd Forward, 0 = Cmd Reverse

3 1 = Rotating Forward, 0 = Rotating Reverse

4 1 = Accelerating, 0 = Not Accelerating

5 1 = Decelerating, 0 = Not Decelerating

6 1 = Alarm, 0 = No Alarm

7 1 = Faulted, 0 = Not Faulted

8 1 = At Reference, 0 = Not At Reference

9 1 = Reference Controlled by Comm

10 1 = Operation Cmd Controlled by Comm

11 1 = Parameters have been locked

12 Digital Input 1 Status

13 Digital Input 2 Status

14, 15 Not Used

Feedback Register: Running Speed − Address: 8451

− Access: R

− Value: A xxx.x decimal value where the decimal point is fixed. For example, a decimal

of 123 equals to 12.3 Hz and 300 equals to 30.0 Hz.



Drive Error Codes Register − Address: 8449

− Access: R

− Value:

Value (Decimal) Description

0 No Fault

2 Auxiliary Input

3 Power Loss

4 Under Voltage

5 Over Voltage

6 Motor Stalled

7 Motor Overload

8 Heat Sink Over Temperature

12 HW Overcurrent (300%)

13 Ground Fault

29 Analog Input Loss

33 Auto Restart Tries

38 Phase U to Ground Short

39 Phase V to Ground Short

40 Phase W to Ground Short

41 Phase UV Short

42 Phase UW Short

43 Phase VW Short

63 Software Overcurrent

64 Drive Overload

70 Power Unit Fail

80 AutoTune Fail

81 Communication Loss

100 Parameter Checksum Error

122 I/O Board Fail



8.2 IAQPoint2 Modbus Registers Gas Display Register (CO2)

− Address: 101

− Access: R

− Value: This reports gas concentration. If the CO2 sensor is fitted, this will report in ppm

from 0 to 5000.

Temperature C Register − Address: 102

− Access: R

− Value: This reports temperature in tenths of a degree Celsius.

Humidity Register − Address: 103

− Access: R

− Value: This reports the relative humidity in percentages from 0 to 100.

configuring siemens s7-300 plc with moxa mgate 4101 · pdf file7. click ok. mgate 4101-mb-pbs...

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