How it Works
Mettler Toledo
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EtherNet/IP-Module

Mettler Toledo Profibus-Module, DeviceNet-Module, EtherNet/IP-Module, ProfiNet IO-Module, CC-Link Module Operating Instructions Manual

Modules
Fieldbus
Operating Instructions
Leer
Table of Content
1 Introduction...........................................................................................................................................6
1.1 General ..................................................................................................................................................6
3Table of Content
4 Table of Content
9.1 Mechanical ..........................................................................................................................................52
9.2 Electrical characteristics ......................................................................................................................... 52
5Table of Content
1 Introduction
1.1 General
The METTLER TOLEDO Fieldbus-Modules allow to connect METTLER TOLEDO weigh modules, industrial scales or laboratory balances (subsequently referenced to as weighing sensors) to an industrial Fieldbus network and make it possible to control the weighing sensor with a PLC master. For each weighing sensor is a separate Fieldbus-Module required.
The following Fieldbus-Modules are currently available:
Part number Fieldbus-Module Chapter
42102809 METTLER TOLEDO Profibus-Module 5.1 42102810 METTLER TOLEDO DeviceNet-Module 5.2 42102860 METTLER TOLEDO EtherNet/IP-Module 5.3 42102859 METTLER TOLEDO ProfiNet IO-Module 5.5
30038775 METTLER TOLEDO CC-Link Module 5.6
6 Introducion
1.2 Compatibility
The Fieldbus-Modules are compatible to all METTLER TOLEDO weighing sensors and balances communicating with MT-SICS protocol via RS232, RS422 or RS485 Interfaces (see datasheet for list of compatible products). MT-SICS is a plain ASCII protocol (MT-SICS = METTLER TOLEDO Standard Interface Command Set) which is used for control and configuration of the weighing sensor.
1.3 Related documentation
Important information of the weighing sensor products can be found in the following documents:
• Instructions for installation and operation (of the individual sensor)
• MT-SICS Reference Manual (for respective sensor type)
• Engineering Note: EN121 EtherNet/IP-DeviceNet and Logix5000
• Engineering Note: EN131 ProfiNet IO - Profibus and STEP 7
1.4 Internet addresses
METTLER TOLEDO Automated Precision Weighing
PROFIBUS Organization
Open DeviceNet Vendors Associaton
ProfiNet Organization
CC-Link Organisation
www.mt.com/APW
www.profibus.com
www.odva.org
www.profinet.com
www.cc-link.org
7Introducion
2 Functional Overview
The METTLER TOLEDO Fieldbus-Module is designed to exchange data between a serial sub-network and a higher level network. For easy transfer is a Basic-Mode (see chapter 6.1, page 38) implemented for the most frequent commands. With the Extended­Mode (see chapter 6.2, page 40) is the full flexibility ensured.
2.1 Data exchange model
PLC
The PLC receives data into its in­ternal input area via the fieldbus network from the IN area of the Fieldbus-Module.
Fieldbus-Module
The IN area of the Fieldbus-Mod­ule contains data received from the weighing sensor.
I/O I/O Inputs Outputs
IN Area OUT Area Local Data (000h) (200h) (400h)
Actual Weight Value
PLC-memory
Actual Weight Value
Internal memory buffer
Module Settings and Commands
Weighing sensor
Module Settings and Commands
Fieldbus
The PLC sends data via the field­bus network, from its internal output area to the OUT area of the Fieldbus-Module.
The OUT area of the Fieldbus­Module contains output data sent from the Fieldbus-Module to the weighing sensor.
8 Functional Overview
Input: Settings and Commands
Output: Weight value and Status
3 Set-up Checklist
PL (e.g. Siemens S7 or Rockwell RSLogix)
Legend
Included in delivery of Fieldbus-Module
C
1
User Manual
1 Fieldbus connector 2 PC connector 3 Subnet connector 4 Power connector
Fieldbus cable
2
3
4
Configuration cable
Power connector
Power cable
Power supply +24 VDC
D-Sub 9 male
11141979
open wires
ConBlock
PBK/PFK-APW
D-Sub 9 male D-Sub 9 male
RS232 Connection cable 11601007
D-Sub 9 male D-Sub 9 male
WMC Weigh Module
RS232 Connection cable 11601007
WXS Weigh Module
D-Sub 9 male
11141979
open wires
ConBlock
WMS Weigh Module
D-Sub 9 male
RS232 Connection cable 11601007
D-Sub 9 male
Industry Scale e.g. BBK
9Functional Overview
4 Step-by-Step Installation and Configuration
The following steps shall be performed to install and configure the weighing sensor and the Fieldbus-Module:
1. Configure the weighing sensor (see chapter 4.1, page 10)
2. DIN-Rail mounting (see chapter 4.2, page 11)
3. Connect the Fieldbus-Module to a PC for initial configuration (see chapter 4.3, page 11)
4. Connect the Fieldbus-Module to the weighing sensor (see chapter 4.4, page 12)
5. Connect the Fieldbus-Module to a power supply (see chapter 4.5, page 13)
6. Configure the Fieldbus-Module and activate the changes in the Fieldbus-Module (see chapter 4.6, page 14)
7. Connect the Fieldbus-Module to the network and check the LED indications (see chapter 5, page 17)
4.1 Configure the weighing sensor
Note It is not possible to configure the weighing sensors, by use of the PC – Fieldbus-Module configuration cable connection. Please refer to the configuration instructions of the individual weighing sensor.
4.1.1 Adjustment of interface communication parameters of the weigh modules
METTLER TOLEDO recommends to use the RS422 interface for if available the communication between weighing sensors and the Fieldbus-Module. Configure the interface of the weigh module to a baud rate of 38400. Use MT-SICS command: COM (see MT-SICS manual for more information).
Note
Set the data flow control to none if you connect any weighing sensor to a METTLER TOLEDO Fieldbus-Module!
METTLER TOLEDO recommends to set 19200 or 38400 baud to allow an update rate up to 92 updates.
Example: RS422, 38400 baud, 8 bit, no parity,1 stop bit and no handshake -> MT-SICS command: COM_1_8_3_0
4.1.2 Adjustment of interface communication parameters of other weighing sensors
The interface communication parameters can be set via the menu or with the data interface port. Please refer to the user manual and/or the MT-SICS Reference Manual of the respective weighing sensor.
10 Step-by-Step Installation and Configuration
A - Snap ON B - Snap OFF
D-sub 9 female
Fieldbus-Module
4.2 DIN-Rail mounting
To mount the Fieldbus-Module on a DIN-Rail follow the steps below:
Snap ON: To snap the Fieldbus-Module on, first press the Fieldbus-Module downward to compress the spring contacting the
DIN-Rail (1), then push the Fieldbus-Module against the DIN-Rail and release it to make it snap on (2).
Snap OFF: To snap the Fieldbus-Module off, push the Fieldbus-Module downward (1) and pull it away from the DIN-Rail (2)
to make it snap off from the DIN-Rail.
4.3 Connect the Fieldbus-Module to a PC for initial configuration
The PC connector is located at the bottom of the Fieldbus-Module. It is used to the configuration of the Fieldbus-Module. The enclosed configuration cable shall be used (connector type is a Western Modular 4/4 on the Fieldbus-Module side).
Note
This cable connection is only suitable to configure the Fieldbus-Module, it cannot be used for weighing sensor configuration (see also chapter 4.1).
Installs in PC’s serial port
D-sub 9 female (PC)
RS232 RxD
5 1
9 6
(female)
RS232 TxD
Ground
1 2 3 4
Western Modular 4/4 connector (Fieldbus-Module)
Ground
1
Ground
2
RxD
3
TxD
4
Western Modular 4/4 connector
5 6 7 8 9
11Step-by-Step Installation and Configuration
4.4 Connect the Fieldbus-Module to the weighing sensor
The subnet connector is located at the bottom of the Fieldbus-Module and is used to connect a METTLER TOLEDO weighing sensor equipped with either a RS232, a RS422 or a RS485 interface (configuration see chapter 4.1). The respective pin assignment is shown in the table on next page.
Since the physical interface can be chosen by the Fieldbus-Module configuration dialog (see chapter 4.6.2), all necessary signals for all three RS-versions are present at the D-Sub 9-connector.
Note
Make sure to connect only the necessary wires used in your application.
4.4.1 WMS, WM and WMH weighing sensor
DSub9 11141979
1 Black - -
2 Brown - TXD
3 Red - RXD
4 Orange - -
5 Yellow GND GND
6 Green Tx+ -
7 Blue Tx- -
8 Purple Rx+ -
9 Grey Rx- -
ConBlock (11152000) for the WMS weigh module ConModule (42102811) for WM and WMH weigh module and platform
RS422 RS232
12 Step-by-Step Installation and Configuration
1 2
Power Connector
51
96
4.4.2 Other METTLER TOLEDO balances and weighing sensors
For other balances and weighing sensors with MT-SICS protocol and either a RS232, a RS422 or a RS485 interface please refer to the respective manual of the weighing sensor to determine the pin assignment of its interface.
Subnet connector Interface Type of weighing sensor
Pin Description RS232 RS422 RS485
1 + 5Volt
2 RS232 RxD
3 RS232 TxD
4 Not connected
5 Ground
6 RS422 Rx+
7 RS422 Rx-
8 RS485+ / RS422 Tx+
9 RS485- / RS422 Tx-
P Wires to be used (depending on weighing sensor’s interface type)
Make sure to connect only the necessary wires depending on the weighing sensor’s interface.
P (TxD)
P (RxD)
P (GND) P (GND) P (GND)
P (Tx+)
P (Tx-)
P (Rx+) P (Rx+)
P (Rx-) P (Rx-)
(female)
4.5 Connect the Fieldbus-Module to a power supply
The power supply connector is located at the bottom of the Fieldbus-Module.
Pin Description
1 + 24V DC +/- 10%, 280 mA max.
2 GND
An appropriate connector (type MSTB 2.5/2-ST-5.08) with screw terminals is included in the delivery. The appropriate cable diameter ranges from 0.2 mm2 to 2.5 mm2 (AWG 24 to AWG 12). Use 60/75 or 75°C copper (CU) wire only. The terminal tightening torque must be between 0.5 - 0.8 Nm (5 - 7 lbs-in).
(2)
­+
(1)
13Step-by-Step Installation and Configuration
4.6 Configure the Fieldbus-Module
4.6.1 PC terminal software
The Fieldbus-Module provides a serial configuration dialog, which allows to configure the communication parameters of the subnet communication by use of a PC. After power-up, the Fieldbus-Module sends an ASCII based configuration dialog via the PC connector to a terminal or a PC. In case of using a PC, a terminal emulation program (such as hyper terminal which is a standard component of Windows) shall be started before power-up of the Fieldbus-Module.
Use the following interface settings at your PC for the terminal program:
• Baud rate: 38400 bps.
• 8 data bits
• 1 stop bit
• No parity check
• No flow control
The dialog will show the following initial Menu on the screen (from a ProfiNet-Module):
The last saved settings will be displayed.
Note
The configuration dialog will be disabled after 60 seconds if no buttons are pressed. You can always press the Esc button to display the main menu again.
Press the number of the option you want to change and then press enter. A new dialog will be displayed where you can enter your new setting. After a new setting is entered, the main menu will be displayed again. The current setting will now show the settings you have configured, but they will not be permanently stored until you save them to the flash by pressing "S" (save configuration to flash) in the main menu. To start using the new settings you must power down and restart the Fieldbus-Module.
14 Step-by-Step Installation and Configuration
4.6.2 Weighing sensor interface
The Fieldbus-Module can communicate with weighing sensors using the following different interfaces:
• RS232, full duplex, no handshake.
• RS422, full duplex, no handshake (default).
• RS485, half duplex, no handshake.
Note
Set the handshake control to none if you connect any weighing sensor to a METTLER TOLEDO Fieldbus-Module!
4.6.3 Baudrate
The Fieldbus-Module can communicate using the following baudrates:
• 1200 bps
• 2400 bps.
• 4800 bps.
• 9600 bps.
• 19200 bps. (Default)
• 38400 bps.
• 57600 bps
4.6.4 Character format
The Fieldbus-Module supports the following character formats:
• 7 None 1 (7 data bits, no parity and 1 stop bit)
• 8 None 1 (8 data bits, no parity and 1 stop bit) (default)
• 7 Even 1 (7 data bits, Even parity and 1 stop bit)
• 7 Odd 1 (7 data bits, Odd parity and 1 stop bit)
4.6.5 Operation mode
The Fieldbus-Module can be used in two different modes (Detail see chapter 6.1, page 38 and chapter 6.2, page 40).
1. The Basic-Mode is the default operation mode and supports the most important MT-SICS commands
2. The Extended-Mode supports all MT-SICS commands and uses 32 bytes for communication.
4.6.6 Maximum response time
With the "Max response time"-option you can set the maximum time between two successive responses from the balance. If the Fieldbus-Module does not receive a new response from the balance within the defined maximum response time, the Fieldbus­Module will indicate this communication problem by setting the connection status bit to "False" and the subnet status LED to red (see chapter 7.2, page 48).
The connection status bit will be set to true (operational) again when cleared by the connection status clear bit.
The "Max response time" is defined to 60 seconds as default and can be changed between 10 sec and 9999 sec or completely switched off. In that case the timeout feature is not working anymore. This might be useful for some applications where longer periods of inactivity may occur.
4.6.7 Configuration from network
This menu point is only available in the ProfiNet IO-Module.
If "Configuration from network" is enabled, all parameters must be configured via network from the configuration program (e.g. PLC). In this case no other configurations from the terminal program are possible.
The default setting for "Configuration from network" is enabled.
15Step-by-Step Installation and Configuration
4.6.8 Automatic baudrate search
All Fieldbus-Modules have the ability to automatically search for correct baudrate and character format on the subnet side. If you want to use automatic baudrate search you first have to configure the correct "Weighing sensor interface" under menu option 1, after that you can start the search by pressing "A" (Perform Automatic baudrate search) in the main menu. The Fieldbus-Module will send a command string to the weighing sensor in all different baudrates and character formats, and if the weighing sensor responds, the Fieldbus-Module has found the correct settings.
Note
Automatic baudrate search can be used for subnet connection test. It will find no baudrate setting in case of failure.
Example of dialog using the automatic baudrate search option:
----------------------------------------------------------------------------------------------
Automatic baudrate search
----------------------------------------------------------------------------------------------
Searching with RS232 interface Pressing ESCAPE interrupts the search. Testing: 9600 bps, 8 none 1 Interface setting: 9600 bps, 8 none 1, no handshake. Do you want to save the interface parameters? (Y/N) >
If N (No) is pressed the Fieldbus-Module will reject the setting and return to the main menu. If Y (Yes) is pressed the Fieldbus-Module will automatically save the new settings to the flash, therefore no additional "Save configuration to flash" is necessary in the main menu.
Note
If an automatic baudrate search is used, the Fieldbus-Module will stop the normal communication with the weighing sensor.
Please refer the LED Indication Table (e.g. for Profibus-Module chapter 5.1.9) for explanations of the LED-signals during auto­matic baudrate search.
4.6.9 Save configuration to flash
To store the configuration permanently to the Fieldbus-Module you must press "S" (Save configuration to flash). Before the new settings can be used, the Fieldbus-Module must be restarted by switching off and on the power supply from the Fieldbus-Module.
16 Step-by-Step Installation and Configuration
5 Fieldbus-Modules
5.1 Profibus-Module
The Profibus version of the METTLER TOLEDO Fieldbus-Module is called MT Profibus Module and has the METTLER TOLEDO Part number: 42102809
5.1.1 General
The METTLER TOLEDO Profibus-Module is designed as a Profibus-DP slave (DPV0) according to EN 50170. It supports all mandatory functions of a Profibus-DP slave. A Profibus master (e.g. a PLC) can send commands and receive data from the Profibus-Module.
For the SIMATIC STEP 7 PLC there is a Engineering note and also a example, specific to METTLER TOLEDO products with SICS communication protocol, available on www.mt.com/ind-APW-fieldbus-support. They significantly shorten integration time and save valuable resources and development time for system integrators and end users.
5.1.2 Supported features
• Auto baudrate detection supported. Baudrate range: 9.6 kbit – 12 Mbit.
• Hardware prepared for DP-V1 extensions.
• Save / Load configuration in Flash supported.
• Address range: 1-99. The node address of the Profibus connection shall always be set via the configuration switches.
• Support all standard diagnostic messages according to standard EN 50170.
Profibus
5.1.3 Identification numbers
Identification number: 0x0642 Hex. Product name: "MT Profibus Module" Part number: 42102809
5.1.4 Profibus node address
Before installing the Profibus-Module in the Profibus network, the node address is to be set with two rotary switches under the lid on the front. The address range is 1 to 99. The lower switch is used for the first digit of the address (value x 10), the upper switch for the second digit of the address (value x 1).
Example
Address = 45 => lower switch to value 4 and upper switch to value 5.
Note
The node address cannot be changed during operation. A new address setting is valid after power-off and power-on of the Profibus-Module.
17Step-by-Step Installation and Configuration
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