BRX BX-MBIO User Manual

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Page 1

Chapter

BX-MBIO MOdBus I/O

Chapter

COntrOller

In This Chapter...

Overview ..................................................................................................................................................... 15-2

BX-MBIO I/O Controllers ............................................................................................................................ 15-3

General Speciﬁcations ............................................................................................................................. 15-3

Serial Port Connector .............................................................................................................................. 15-4

Power Supply Connector ........................................................................................................................ 15-5

Power Supply Speciﬁcations for BX-MBIO-M ......................................................................................... 15-6

Power Supply Connections ..................................................................................................................... 15-6

Power Supply Speciﬁcations for BX-MBIO-M-D ..................................................................................... 15-7

Power Supply Connections ..................................................................................................................... 15-7

Conﬁguration .............................................................................................................................................. 15-8

DIP Switch Speciﬁcations ........................................................................................................................... 15-8

Status Indicators ......................................................................................................................................... 15-9

Modbus Protocol Function Codes Supported by BX-MBIO .................................................................... 15-10

Modbus Protocol Exception Responses ................................................................................................... 15-13

Modbus RTU, Serial Communications......................................................................................................15-15

Modbus TCP, Ethernet Communications ................................................................................................. 15-20

BX-MBIO Conﬁguration ........................................................................................................................... 15-20

Troubleshooting with Modbus Poll.......................................................................................................... 15-34

Detailed Example: Using the Modbus Poll Utility to Verify Communications With BX-MBIO .......... 15-34

Additional BX-EBC100 and BX-MBIO Modbus Mapping Information .................................................... 15-45

Modbus Mapping for I/O ...................................................................................................................... 15-45

System Memory Modbus Mapping ...................................................................................................... 15-45

Error Codes ........................................................................................................................................... 15-47

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Chapter 15: BX-MBIO Modbus I/O Controller

BX-MBIO Modbus PCP Remote IO Network.eps

Overview

The BX-MBIO Modules are remote I/O controller modules that provides a remote I/O drop using the Modbus protocol for communications. They are Modbus RTU slave devices and Modbus TCP servers. They function as listening/replying devices and can connect with any mastering (client) device that communicates using the Modbus protocol.

Modbus RTU is supported over an RS-485 serial connection. Modbus TCP is supported over an Ethernet connection. Any Modbus RTU master and Modbus TCP client that adheres to the Modbus.Org standards, and support the function codes listed in this chapter, can communicate with the BX-MBIO.

The units have no built-in I/O points. The user can customize the I/O to meet the needs of their application by adding as many as eight (8) BRX Expansion Modules, allowing more ﬂexibility while keeping control costs down.

Modbus TCP Master Poll Utility

Stride Ethernet Switch

GS3 AC Drive

GS-EDRV100

BX-MBIO-x

OUTPUT

IN/OUT

I0+

I1+

I0+

I2+

BX-12TD1

I1+

I3+

I2+

I3+

I4+

I5+

I6+

I7+

BX-12CD3D1

BX-MBIO-x

OUTPUT

IN/OUT

I0+

I1+

I2+

BX-12TD1

I0+

I3+

I1+ I2+

I4+

I3+

I5+

I6+ I7+

BX-12CD3D1

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BX-MBIO I/O Controllers

General Speciﬁcations

• RJ45 Ethernet port for communications via Modbus TCP

• RS485 serial port for communications via Modbus RTU

• No support for Pluggable Option Module (POM)

• Supports up to 8 additional Expansion Modules

• No built-in discrete or analog I/O

• AC and DC powered units available

• AC powered units include an integral 24VDC auxiliary output power supply

• Power connector and serial port connector included

Chapter 15: BX-MBIO Modbus I/O Controller

BX-MBIO-M Modbus I/O Controller

BX-MBIO Controllers

Part Number

BX-MBIO-M 120–240 VAC 8

BX-MBIO-M-D 12–24 VDC 8

BRX User Manual, 4th Edition, Rev. F

External

Power

Expansion

Modules

BX-MBIO-M-D Modbus I/O Controller

Can be Used With

Modbus RTU Modbus TCP

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Chapter 15: BX-MBIO Modbus I/O Controller

General Speciﬁcations, continued

General Speciﬁcations

Part Number BX-MBIO-M BXC-MBIO-M-D

Operating Temperature 0° to 60°C (32° to 140°F)

Storage Temperature -20° to 85°C (-4° to 185°F)

Humidity 5 to 95% (non-condensing)

Environmental Air No corrosive gases permitted

Vibration IEC60068-2-6 (Test Fc)

Shock IEC60068-2-27 (Test Ea)

Enclosure Type Open Equipment

Agency Approvals

Noise Immunity NEMA ICS3-304

EU Directive See the “EU Directive” topic in the Help File

Heat Dissipation 10.8 W Max 8.6 W Max

Weight 198g (7oz) 170g (6oz)

Software Version NetEdit Version 3.15 or later

NOTE: Eight (8) Expansion Modules can be connected to add I/O capability. Only Discrete and Analog Expansion Modules are supported.

UL61010-2 - UL File # E185989 Canada and USA

CE Compliant EN61131-2

NOTE: If you are a Do-more! user and are looking to add additional remote I/O you should consider the BX-DMIO or the BX-EBC100 for a lower cost and easier installation and startup. (See Chapter 14 for more detail.) The BX-MBIO Controllers are designed for systems that use Modbus Clients as remote I/O drops.

Serial Port Connector

BX-MBIO Serial Port Connector Speciﬁcations

Part Number BX-RTB03S

Connector Type Screw Type-90° (included with unit)

Wire Exit 180 deg

Pitch 3.5 mm

Screw Size M2

Recommended Screw Torque < 1.77 lb·in (0.2 N·m)

Screwdriver Blade Width 2.5 mm

Wire Gauge (Single wire) 28-16 AWG

Wire Gauge (Two wires) 28-16 AWG

Wire Strip Length 0.24 in (6mm)

Equiv. Dinkle P/N EC350V-03P-BK

BX-RTB03S

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Chapter 15: BX-MBIO Modbus I/O Controller

Power Supply Connector

The power supply terminal block connector is included with each controller. The power supply connector is a screw type, removable terminal block. Replacement connectors and speciﬁcations are listed in the tables that follow.

BX-MBIO-M AC Power Supply Connector Speciﬁcations

Part Number

Connector Type Screw Type-90 deg Spring Clamp Type-180 deg Screw Type-180 deg

Wire Exit 180 deg 180 deg 180 deg

Pitch 5.0 mm 5.0 mm 5.0 mm

Screw Size M2.5 N/A M2.5

Recommended Screw Torque < 3.98 lb·in (0.45 N·m) N/A < 3.98 lb·in (0.45 N·m)

Screwdriver Blade Width 3.5 mm 3.5 mm 3.5 mm

Wire Gauge (Single wire) 28–12 AWG 28–14 AWG 28–14 AWG

Wire Gauge (Two wire) 28–16 AWG

Wire Strip Length 0.3 in (7.5 mm) 0.37 in (9.5 mm) 0.37 in (9.5 mm)

Equiv. Dinkle P/N 5ESDV-05P-BK 5ESDSR-05P-BK 5ESDF-05P-BK

BX-RTB05

(Included w/Unit)

BX-RTB05-1 BX-RTB05-2

(Dual Wire Ferrule Required)

28–16 AWG

(Dual Wire Ferrule Required)

28–16 AWG

BX-RTB05-2BX-RTB05-1BX-RTB05

BX-MBIO-M-D DC Power Supply Connector Speciﬁcations

Part Number BX-RTB03 (Included w/Unit) BX-RTB03-1 BX-RTB03-2

Connector Type Screw Type-90 deg Spring Clamp Type-180 deg Screw Type-180 deg

Wire Exit 180 deg 180 deg 180 deg

Pitch 5.0 mm 5.0 mm 5.0 mm

Screw Size M2.5 N/A M2.5

Recommended Screw Torque < 3.98 lb·in (0.45 N·m) N/A < 3.98 lb·in (0.45 N·m)

Screwdriver Blade Width 3.5 mm 3.5 mm 3.5 mm

Wire Gauge (Single wire) 28–12 AWG 28-14 AWG 28-12 AWG

Wire Gauge (Two wires) 28–16 AWG

Wire Strip Length 0.3 in (7.5 mm) 0.37 in (9.5 mm) 0.3 in (7.5 mm)

Equiv. Dinkle P/N 5ESDV-03P-BK 5ESDSR-03P-BK 5ESDF-03P

BX-RTB03

28-16 AWG (Dual Wire Ferrule Required)

BX-RTB03-1

28-16 AWG

BX-RTB03-2

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Chapter 15: BX-MBIO Modbus I/O Controller

300mA max.

Power Supply Speciﬁcations for BX-MBIO-M

BX-MBIO-M Power Supply Speciﬁcations

Nominal Voltage Range 120–240 VAC

Input Voltage Range (Tolerance) 85–264 VAC

Rated Operating Frequency 47–63 Hz

Maximum Input Power 40VA

Cold Start Inrush Current 1.5 A, 2ms

Maximum Inrush Current (Hot Start) 1.5 A, 2ms

Internal Input Fuse Protection Micro fuse 250V, 2A Non-replaceable

Acceptable External Power Drop Time 10ms

Under Input Voltage Lock-out 80VAC

Input Transient Protection Input choke and line lter

Output Protection for Over Current, Over Voltage, and Over Temperature

Auxiliary 24VDC Output

Voltage Withstand (dielectric)

Insulation Resistance >10MΩ @ 500VDC

Self resetting

24VDC @ 0.3 A max, <1V P-P Ripple, Integrated self-resetting

short circuit protection, Isolated

1500VAC Power Inputs to Ground applied for 1 minute

1500VAC Ground to 24VDC Output applied for 1 minute

Power Supply Connections

Pin Connection

1 L

2 N

3 GND

4 V–

5 V+

Removable Connector Included ADC Part # BX-RTB05

WARNING: Do not exceed the 24VDC auxiliary power supply load limit of 300mA.

WARNING: The BRX System MUST have a proper earth ground. Do not operate the BRX MPU without proper earth grounding.

AC Power In

120–240 VAC

– +

Auxillary out

24VDC

L N GND VV+

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Power Supply Speciﬁcations for BX-MBIO-M-D

BX-MBIO-M-D Power Supply Speciﬁcations

Nominal Voltage Range* 12–24 VDC

Input Voltage Range (Tolerance)* 10–36 VDC

Maximum Input Voltage Ripple < ±10%

Maximum Input Power 30W

Cold Start Inrush Current 5A, 2ms

Maximum Inrush Current (Hot Start) 5A, 2ms

Internal Input Protection

Acceptable External Power Drop Time 10ms

Under Input Voltage Lock-out <9VDC

Output Protection for Over Current, Over Voltage, and Over Temperature

Auxiliary 24VDC Output None

Voltage Withstand (dielectric) 1500VAC power Inputs to ground applied for 1 minute

Insulation Resistance >10MΩ @ 500VDC

* Class 2 or LPS Power Supply required.

Reverse polarity protection and undervoltage lockout via

Chapter 15: BX-MBIO Modbus I/O Controller

transistor circuit

Self resetting

Power Supply Connections

Class 2 or LPS

Pin Connection

1 GND

2 PWR –

3 PWR +

Removable Connector Included ADC Part # BX-RTB03

WARNING: The BRX System MUST have a proper earth ground. Do not operate the BRX MPU without proper earth grounding.

User Supplied Power

DC Power In

12–24 VDC

GND PWRPWR+

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Chapter 15: BX-MBIO Modbus I/O Controller

7 6 5 4 3 2 1 0

Conﬁguration

The BX-MBIO controller can be conﬁgured as a serial Modbus RTU slave or as a Ethernet Modbus TCP server.

As a Modbus RTU serial slave you can simply use the dip switches and set the module ID. Using the default settings no other setup is needed. Any changes to the conﬁguration of the controller is done through the Ethernet port using the NetEdit 3 utility to get access to the web conﬁguration page of the controller. See Appendix E if needed on how to use the NetEdit 3 utility to gain this access.

Default settings:

• The serial port - 115,200 baud, 8 data bits, parity None, 1 stop bit

• The attached expansion modules - see the expansion module speciﬁcations for the default settings for each module.

As a Modbus TCP Ethernet server the NetEdit 3 utility will be needed to set the Ethernet settings and to gain access to the web conﬁguration page. See appendix E if needed on how to use the NetEdit 3 Utility to gain this access.

DIP Switch Speciﬁcations

The BX-MBIO Modbus I/O controller has a block of DIP switches, located on the top of the chassis, that are used to setup the serial port station number, write protect the module and disable the Web conﬁguration page. The DIP switch settings are read when the system is powered up. The default position for all DIP switches is OFF.

WARNING: The BX-MBIO Modbus I/O controller must be powered down prior to changing DIP switch settings.

NOTE: DIP switches located in

this compartment are used for controller configuration.

PWR

ERR

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Chapter 15: BX-MBIO Modbus I/O Controller

76543210

The following table describes the position and function associated with each DIP switch.

DIP Switch Settings

DIP# Switch Position Function

7 ON Reserved

6 ON Reset the module to factory default

5 ON

4 ON Station number:

3 ON

2 ON

1 ON

0 ON

Write protect the module. No writes to ash memory are allowed. Disable Web conguration page.

DIP Switch 0–4: Supports addresses 1 to 31.

All DIP Switch OFF:

Station number from ash. Enter via Netedit 3 or Web conguration page.

Supports addresses 1 to 247.

DIP Switch position is read when power is applied to the module. Power down the module before changing DIP switch settings.

DIP switches 0 to 4: Use to set a ﬁxed serial port station number, from 1 to 31. If all ﬁve switches are left in the OFF position, the station number will be read from the module ﬂash. The user can use the utility NetEdit 3 or, if enabled, the user can use the Web conﬁguration page to set the RS-485 station number, from 1 to 247.

DIP Switch 5: When ON, it will write protect the module. It will not be possible to update the network settings, update the ﬁrmware or the booter version. It also disables access to the Web conﬁguration page.

DIP Switch 6: When ON, the module is reset to factory defaults.

Status Indicators

BX-MBIO Status Indicators

Indicator Status Description

PWR

ERR

LNK

ACT

OFF Base Power is OFF

GREEN Base Power is Good

GREEN Controller is Functioning Normally

GREEN (Blinking) Reset Mode (Booter without OS)

YELLOW Analog Module Mismatch

OFF Controller HW Error or Power is OFF

OFF Controller is Functioning Normally

RED Controller HW Error or Communications Watchdog Timeout

RED (Blinking) Reset Mode (Booter without OS)

OFF No Transmit Activity

GREEN (Blinking) Data is being Transmitted

OFF No Receive Activity

GREEN (Blinking) Data is being Received

OFF No Ethernet Link

GREEN Ethernet Link is Good

OFF No Ethernet Activity

GREEN (Blinking) Ethernet Activity

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Chapter 15: BX-MBIO Modbus I/O Controller

Modbus Protocol Function Codes Supported by BX-MBIO

Modbus Protocol Function Codes

Function Type

Read Coil Status 01 01

Read Input Status 02 02

Read Holding Registers 03 03

Read Input Registers 04 04

Force Single Coil 05 05

Preset Single Register 06 06

Force Multiple Coils 15 0F

Force Multiple Registers 16 10

Mask Write Register 22 16

NOTE: Please visit Modbus.org to get information on the latest revision of the Modbus Protocol Speciﬁcations.

Modbus Function Code

(Decimal) (Hex)

Function 01 (0x01) Read Coils

This function code is used to read the status of a block (1 to 2000) of contiguous coils (bits) in a remote device. Depending on the type of Modbus slave, coils can be used as internal bits or physical discrete outputs.

Modbus data type identiﬁer: 0xxxxx

Modbus address range: 000001 to 065536

Example: Coil 17 is referred to as 000017

Function 02 (0x02) Read Discrete Inputs

This function code is used to read the status of a block (1 to 2000) of contiguous discrete inputs (bits) in a remote device.

Modbus data type identiﬁer: 1xxxxx

Modbus address range: 100001 to 165536

Example: Discrete input 31 is referred to as 1000031

Function 03 (0x03) Read Holding Registers

This function code is used to read the contents of a block (1 to 125) of contiguous holding registers in a remote device. Holding registers are 16 bit words. Depending on the Modbus slave, Holding Registers may be used to address Analog Outputs or used as general purpose registers to store values in the program.

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Modbus data type identiﬁer: 4xxxxx

Modbus address range: 400001 to 465536

Example: Holding Register 2035 is referred to as 402035

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Chapter 15: BX-MBIO Modbus I/O Controller

Modbus Protocol Function Codes Supported by BX-MBIO, continued

Function 04 (0x04) Read Input Registers

This function code is used to read the contents of a block (1 to 125) of contiguous input registers in a remote device. Input Registers are 16 bit words. Depending on the Modbus slave, they may be used to address Analog Inputs or read-only values.

Modbus data type identiﬁer: 3xxxxx

Modbus address range: 300001 to 365536

Example: Input Register 1027 is referred to as 301027

Function 05 (0x05) Write Single Coil

This function code is used to write a single output to either ON or OFF in a remote device. Depending on the type of Modbus slave, coils can be used as internal bits or physical discrete outputs.

Modbus data type identiﬁer: 0xxxxx

Modbus address range: 000001 to 065536

Example: Coil 17 is referred to as 000017

Function 06 (0x06) Write Single Register

This function code is used to write a single holding register in a remote device. Holding registers are 16-bit words. Depending on the Modbus slave, Holding Registers may be used to address Analog Outputs or used as general purpose registers to store values in the program.

Modbus data type identiﬁer: 4xxxxx

Modbus address range: 400001 to 465536

Example: Holding Register 2035 is referred to as 402035

Function 15 (0x0F) Write Multiple Coils

This function code is used to force each coil in a sequence (1 to 1968) of coils (bits) to either ON or OFF in a remote device. Depending on the type of Modbus slave, coils can be used as internal bits or physical discrete outputs.

Modbus data type identiﬁer: 0xxxxx

Modbus address range: 000001 to 065536

Example: Coil 64 is referred to as 000064

Function 16 (0x10) Write Multiple Registers

This function code is used to write a block (1 to 123 registers) of contiguous Holding Registers in a remote device. Holding registers are 16 bit words. Depending on the Modbus slave, Holding

Registers may be used to address Analog Outputs or used as general purpose registers to store values in the program.

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Chapter 15: BX-MBIO Modbus I/O Controller

Modbus Protocol Function Codes Supported by BX-MBIO, continued

Modbus data type identiﬁer: 4xxxxx

Modbus address range: 400001 to 465536

Example: Holding Register 2035 is referred to as 402035

Function 22 (0x16) Mask Write Register

This function code is used to modify the contents of a speciﬁed holding register using a combination of an AND mask, an OR mask, and the register’s current contents. The function can be used to set or clear individual bits in the register.

The request speciﬁes the holding register to be written, the data to be used as the AND mask, and the data to be used as the OR mask.

The function’s algorithm is:

Result = (Current Contents AND And_Mask) OR (Or_Mask AND (NOT And_Mask))

For example:

Mask Write Register Example

Hex Binary

Current Contents 12 0001 0010

And_Mask = F2 1111 0010

Or_Mask = 0D 0000 1101

(NOT And_Mask) = 17 0001 0111

Result = 17 0001 0111

Note:

• If the Or_Mask value is zero, the result is simply the logical ANDing of the current contents and And_Mask. If the And_Mask value is zero, the result is equal to the Or_Mask value.

• The contents of the register can be read with the Read Holding Registers function (function code

03). They could, however, be changed subsequently as the controller scans its user logic program.

Modbus data type identiﬁer: 4xxxxx

Modbus address range: 400001 to 465536

Example: Holding Register 2035 is referred to as 402035

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Page 13

Modbus Protocol Exception Responses

Except for a broadcast message, when a client (master) device sends a request to a server (slave) device it expects a normal response. One of four possible events can occur from the client’s (master) query:

• If the server (slave) device receives the query without a communication error, and can handle the

query normally, it returns a normal response.

• If the server (slave) does not receive the query due to a communication error, no response is returned.

The client (master) will eventually process a timeout condition for the request. (Timeout is ﬁxed at 800ms. Once the ﬁrst character arrives, the controller waits 800ms for the entire request to arrive.)

• If the server (slave) receives the query, but detects a communication error (parity, LRC, CRC, ...), no

response is returned. The client (master) will eventually process a timeout condition for the request. (Timeout is ﬁxed at 800ms. Once the ﬁrst character arrives, the controller waits 800ms for the entire request to arrive.)

• If the server receives the query without a communication error, but cannot handle it (for example,

if the request is to read a non–existent coil or register), the server (slave) will return an Exception Response informing the client (master) of the nature of the error. This Exception Response value from the server (slave) can optionally be stored in a memory location. The BX-MBIO uses a 1-byte Exception Code on an exception response.

Chapter 15: BX-MBIO Modbus I/O Controller

BRX User Manual, 4th Edition, Rev. F

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Chapter 15: BX-MBIO Modbus I/O Controller

Modbus Protocol Exception Responses, continued

List of Modbus Exception Response Codes

Code Name Meaning

The function code received in the query is not an allowable action for the server (or slave).

01 Illegal Function

02 Illegal Data Address

03 Illegal Data Value

04 Slave Device Failure

05 Acknowledge

06 Slave Device Busy

08 Memory Parity Error

Gateway Path Unavailable

Gateway Target Device Failed to Respond

This may be because the function code is only applicable to newer devices, and was not implemented in the unit selected. It could also indicate that the server (or slave) is in the wrong

state to process a request of this type, for example because it is uncongured and is being

asked to return register values.

The function code received in the query is not an allowable action for the server (or slave). This may be because the function code is only applicable to newer devices, and was not implemented in the unit selected. It could also indicate that the server (or slave) is in the wrong

state to process a request of this type, for example because it is uncongured and is being

asked to return register values.

A value contained in the query data eld is not an allowable value for server (or slave). This

indicates a fault in the structure of the remainder of a complex request, such as that the implied

length is incorrect. It specically does NOT mean that a data item submitted for storage in

a register has a value outside the expectation of the application program, since the Modbus

protocol is unaware of the signicance of any particular value of any particular register.

An unrecoverable error occurred while the server (or slave) was attempting to perform the requested action.

Specialized use in conjunction with programming commands.

The server (or slave) has accepted the request and is processing it, but a long duration of time will be required to do so. This response is returned to prevent a timeout error from occurring in the client (or master). The client (or master) can next issue a Poll Program Complete message to determine if processing is completed.

Specialized use in conjunction with programming commands.

The server (or slave) is engaged in processing a long duration program command. The client (or master) should retransmit the message later when the server (or slave) is free.

Specialized use in conjunction with function codes 20 and 21 and reference type 6, to indicate

that the extended le area failed to pass a consistency check.

The server (or slave) attempted to read record le, but detected a parity error in the memory.

The client (or master) can retry the request, but service may be required on the server (or slave) device.

Specialized use in conjunction with gateways, indicates that the gateway was unable to allocate an internal communication path from the input port to the output port for processing the

request. Usually means that the gateway is miscongured or overloaded.

Specialized use in conjunction with gateways, indicates that no response was obtained from the target device. Usually means that the device is not present on the network.

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Modbus RTU, Serial Communications

Pinout RS485

1 GND

2 D-

3 D+

RS-485 is a multi-point wiring standard that can be used to connect external devices to the PLC. The RS-485 port has a removable three-pin screw terminal block located on the front of the CPU. The serial port has a software-selectable 120Ω termination resistor available if needed.

RS-485 Speciﬁcations

Port Type RS-485

Non-isolated serial port that can communicate via RS-485.

Description

Supported Protocols Modbus RTU (Slave)

Data Rates 1200, 2400, 4800, 9600, 19200, 38400, 57600, and 115200

Timeout

Default Settings RS-485, 115200 bps, No Parity, 8 Data Bits, 1 Stop Bit, Station #1

Port Type 3-pin terminal strip 3.5mm pitch

RS-485 Station Addresses 1-247

Cable Requirements RS-485 use L19954-XXX from AutomationDirect.com

Replacement Connector ADC Part # BX-RTB03S

Includes ESD protection and built-in surge protection. 120Ω Termination resistor is available (software selectable). Includes internal biasing to be a true failsafe receiver while maintaining EIA/TIA-485 compatibility.

Fixed at 800ms. Once the rst character arrives, the controller waits

800ms for the entire request to arrive.

Chapter 15: BX-MBIO Modbus I/O Controller

The RS-485 standard supports distances of up to 1000 meters without requiring a repeater. The distance can be increased by placing an RS-485 repeater on the network, if necessary.

RS-485 utilizes a differential signal which makes it much more immune to noise and grounding issues than RS-232 and is therefore a much better choice when available for communications. This port only supports RS-485, 2-wire connections. Please note that there are no connections for RTS (Ready To Send), CTS (Clear To Send) or for port powered devices (+5VDC).

BRX User Manual, 4th Edition, Rev. F

GND

D-

D+

RS485

Removable connector included (ADC Part# BX-RTB03S)

Pinout RS-485

1 GND 2 D3 D+

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Chapter 15: BX-MBIO Modbus I/O Controller

Modbus Client

Sig

O-M

ADC # L19954-xxx or equivalent is recommend for RS-485 networks.

Modbus RTU, Serial Communications, continued

Field Wiring information:

RS-485*

RS-485

GND

D-

D+

BX-MBIO

Signal GND

D-

D+

Slave 1

GND

D-

D+

Slave n

GND

D-

D+

Field Device Termination User-supplied

GND

D-

D+

*NOTE: Termination resistor is built-in and software selectable.

RS-485 example wiring diagrams

Example Wiring BX-MBIO to PC via RS-485, using Modbus Poll Software as Modbus RTU Master

RS-485 Modbus RTU Network

Modbus RTU Master Poll Utility

AutomationDirect Part # USB-485 Black 2-wire cable (flying leads):

Red (to D+) Green (to D-)

Modbus RTU BX-MBIO-M Node 1

Modbus RTU BX-MBIO-M Node 2

Verify: Port settings match Different station # for each node Terminate on each end of network when possible.

Recommend cable: ADC P/N L19954-XXX

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Modbus RTU BX-MBIO-M Last Node 120Ω Termination Enabled

(Software Selectable)

Page 17

Chapter 15: BX-MBIO Modbus I/O Controller

Modbus RTU, Serial Communications, continued

Example Wiring BX-MBIO to C-more HMI via RS-485

RS-485 C-more RTU Network

Modbus RTU Master

Recommend cable: ADC P/N L19954-XXX

Modbus RTU BX-MBIO-M Node 1

Modbus RTU BX-MBIO-M Node 2

Modbus RTU BX-MBIO-M Last Node 120Ω Termination Enabled

(Software Selectable)

EA-COMCON-3 (-3A)

Terminal Block Adapter

plugs into C-more 15-pin

PLC Serial Comm. Port

15-pin D-sub

8 = do not use 7 = do not use 6 = do not use 5 = Logic GND 4 = do not use 3 = do not use 2 = do not use 1 = Frame GND

(male)

GND

RD –

SD –

SD +

RD +

TERM

15 = do not use 14 = do not use

13 = Termination 12 = SD– (RS485) 11 = SD+ (RS485) 10 = RD– (RS485) 9 = RD+ (RS485)

BX-MBIO-M

Node 1

GND

D-

D+

BX-MBIO-M

Node 2

GND

D-

D+

User-Constructed Cable

BX-MBIO-M (-D)

Term.

RD + D +

SD +

RD – D –

SD –

Wiring Diagram

shield

BX-MBIO-M

Last Node

GND

D-

D+

GND

BRX User Manual, 4th Edition, Rev. F

15-17

Page 18

Chapter 15: BX-MBIO Modbus I/O Controller

Modbus RTU, Serial Communications, continued

Example Wiring BX-MBIO to Click PLC via RS-485

RS-485 Click to BX-MBIO

Modbus RTU Master

Modbus RTU BX-MBIO-M Node 1

Modbus RTU BX-MBIO-M Node 2

Port 3

–

RS-485

Recommend cable: ADC P/N L19954-XXX

User-supplied 120Ω Termination

(+)

(–)

GND

D-

D+

Modbus RTU BX-MBIO-M Last Node 120Ω Termination Enabled

(Software Selectable)

BX-MBIO-M (-D)BX-MBIO-M (-D)

GND

D-

D+

120Ω Termination Enabled

(Software Selectable)

15-18

BRX User Manual, 4th Edition, Rev. F

Page 19

Chapter 15: BX-MBIO Modbus I/O Controller

Modbus RTU, Serial Communications, continued

Example Wiring BX-MBIO to Productivity PLC via RS-485

RS-485 Productivity to BX-MBIO

Modbus RTU Master

Recommend cable: ADC P/N L19954-XXX

Modbus RTU BX-MBIO-M Node 1

Modbus RTU BX-MBIO-M Node 2

Modbus RTU BX-MBIO-M Last Node 120Ω Termination Enabled

(Software Selectable)

Signal GND

TXD-/RXD-

TXD+/RXD+

User-supplied 120Ω Termination

BRX User Manual, 4th Edition, Rev. F

BX-MBIO-M (-D)

GND

D-

D+

BX-MBIO-M (-D)

GND

D-

D+

120Ω Termination Enabled

(Software Selectable)

15-19

Page 20

Chapter 15: BX-MBIO Modbus I/O Controller

Modbus TCP, Ethernet Communications

The RJ-45 Ethernet port connector is located on the CPU faceplate. Rated at 10/100 Mbps, it accepts standard CAT5e cable and has built-in auto-crossover capability.

Ethernet Speciﬁcations

Port Type Ethernet

Description Standard transformer-isolated Ethernet port with built-in surge protection.

Transfer Rate 10Mbps and 100Mbps

Port Status LED

Timeout

Supported Protocols Modbus TCP (Server)

Cable Recommendation C5E-STxxx-xx from AutomationDirect.com

Port Type RJ45, Category 5, 10/100 BASE-T, Auto Crossover

Ethernet Port Numbers:

Modbus TCP (Server)

LINK LED is solid when network LINK is established. ACT LED ashes

when port is active.

Fixed at 800ms. Once the rst character arrives, the controller waits

800ms for the entire request to arrive.

502, TCP

BX-MBIO Conﬁguration

To perform the initial conﬁguration of the BX-MBIO, use the NetEdit 3 utility. Please refer to Appendix E of this manual for information on how the free NetEdit 3 utility is used to manage all aspects of HOST Ethernet-enabled devices. This includes the conﬁguration of the network settings, updating the ﬁrmware in the devices, and setting up any runtime conﬁguration options that are available to the HOST device.

Once the BX-MBIO has been assigned an IP address and subnet by using NetEdit 3, it is possible to use the Web Conﬁguration Page to perform additional conﬁgurations.

The Web Conﬁguration Page can be accessed via NetEdit 3 or via a browser.

15-20

BRX User Manual, 4th Edition, Rev. F

Page 21

BX-MBIO Conﬁguration, continued

If using NetEdit 3, select BX-MBIO from the list of available HOST Ethernet devices. You can select the “Start Web based Conﬁg” from the (1) MBIO Settings tab or from the (2) drop down list you get when you right click on the BX-MBIO row.

Chapter 15: BX-MBIO Modbus I/O Controller

If using a web browser, enter the IP address of the BX-MBIO you want to conﬁgure in the URL address ﬁeld of the web browser.

After selecting “Start Web based Conﬁg…” in NetEdit 3 or accessing the IP address of the BX-MBIO via a browser page, the following web page will open in your default Web Browser:

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Chapter 15: BX-MBIO Modbus I/O Controller

BX-MBIO Conﬁguration, continued

(a) Module Name

The user is able to change the name of the module, making it meaningful to the location or the process. Select the (a) link to change the name. The Module Name can be 255 characters long.

(b) Module Description

The user is able to change the description of the module, allowing the addition of pertinent information to the process. Select the (b) link to edit the module description. The Module Description can be 255 characters long.

Selecting the link to change the (a) Module Name or the (b) Module Description, brings up this page:

(1) Back button, returns you to the main setup page of the Web conﬁguration page.

(2) Send button, writes the modiﬁed information to the BX-MBIO.

(3) Reset button, changes any edits back to default.

To complete editing the Module Name or Description, select the (2) Send button. Once it is complete, a dialog box will conﬁrm “Module Data setup complete.”

This ﬁeld displays the MAC address of the BX-MBIO. This is a static ﬁeld.

(d) IP Setup

The user is able to change the IP address, the subnet and the gateway of the module. Access the setup page by selecting the (d) link. This brings up the Set up IP Conﬁguration page:

15-22

BRX User Manual, 4th Edition, Rev. F

Page 23

BX-MBIO Conﬁguration, continued

(1) Mode: gives you two options from a drop-down menu:

(i) Obtain an IP address automatically. Use only if DHCP server is available.

(ii) Use the following IP address

(3) IP Address: Enter the BX-MBIO network IP address. This should be in the same family as that

of the Modbus client.

(4) Subnet Mask: Enter the Subnet Mask associated with the network to which the BX-MBIO is

added.

(5) Gateway: Enter the IP address of the network gateway.

(6) Back button, returns you to the main setup page of the Web conﬁguration page.

(7) Send button, writes the modiﬁed information to the BX-MBIO.

(8) Reset button, changes any edits back to default.

To complete editing the Set up IP Conﬁguration, select the (6) Send button. Once it is complete, a dialog box will conﬁrm “Set up IP Conﬁguration complete.”

(e) Serial Port Setup

Chapter 15: BX-MBIO Modbus I/O Controller

Selecting the serial port setup link brings up the Set up RS485 Port page:

(1) Station ID: Enter a valid station number, 1-247. Each device on the network must have a unique

station ID.

(2) Baud Rate: The rate at which the data is transmitted. The higher the number the faster the

data will be transmitted. Choosing a lower value can help with issues when the data is not being received reliably. Available Baud Rate choices: 115200, 57600, 38400, 19200, 9600, 4800, 2400,

1200. This must match the baud rate of the Modbus RTU master.

(3) Parity: The method of error detection used during transmission. Available choices: Even, Odd,

None.

(4) Data Bits: The number of bits in each character. Available choices: 7 or 8.

(5) Stop Bits: The number of bits sent to denote the end of each character. Available choices: 1 or 2.

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15-23

Page 24

Chapter 15: BX-MBIO Modbus I/O Controller

BX-MBIO Conﬁguration, continued

(6) Enable 120-ohm Termination: When enabled, a 120-ohm termination resistor is added to the

BX-MBIO RS-485 circuit. Use only at the beginning and end of the RS-485 network.

(7) Pre-Transmit Delay (ms): Enter a time from 0 to 500ms. This allows the user to adjust the

response rate based on what master is talking to it. For example, a radio may require a delay before they are ready to “receive” a packet of information.

(8) Back button, returns you to the main setup page of the Web conﬁguration page.

(9) Send button, writes the modiﬁed information to the BX-MBIO.

(10) Reset button, changes any edits back to default.

(11) To complete editing the Serial Port Setup, select the (9) Send button. Once it is complete, a

dialog box will conﬁrm “Serial Port Setup complete.”

(f) Module Setup

The user is able to view which expansion modules are in each slot. If Analog I/O modules are installed, the user will be able to change the module conﬁguration. Access the setup page by selecting the (f) link. This brings up the Set up Module Conﬁguration page. In general, the page will display a list of slot numbers and the module part number installed in that slot. Conﬁguration ﬁelds will be available for the slot with an installed Analog I/O module.

Each displayed module part number is a hyperlink to the product insert for that module on www. AutomationDirect.com.

One example conﬁguration used to illustrate the module setup interface comprises the following:

Slot 1: BX-05TRS

Slot 2: BX-08TR

Slot 3: BX-08NA

Slot 4: BX-04THM

Slot 5: BX-08AD-2B

Slot 6: BX-08DA-2B

Slot 7: BX-08AD-1

Slot 8: BX-08DA-1

We will step through the Set up Module Conﬁguration page for this example slot-by-slot.

Slots 1–3 (Discrete I/O modules):

15-24

In this example we have three discrete I/O modules installed. There is nothing to conﬁgure for these discrete I/O modules. All Discrete I/O expansion modules available to the BRX series work in a similar manner.

BRX User Manual, 4th Edition, Rev. F

Page 25

BX-MBIO Conﬁguration, continued

Slot 4 (BX-04THM):

The BX-04THM analog temperature module is installed in slot 4 in this example. The BX-04THM module has the following conﬁguration options:

(i) Channels Enabled: (1–4)

(ii) Temp Scale: Celsius or Fahrenheit.

(iii) Burn Out Mode: Select if the Input register should read a Low

or High value on burn out or if burn out detection should be disabled. Note: Burn Out Mode must be set to Disabled in order to use a Thermocouple Calibrator.

(iv) Input Range for Channels 1 to 4: These are the settings for each channel of the analog

temperature module. Available choices are: J, K, E, R, S, T, B, N, C, 0-39mV, +/-39mV, +/-78mV, 0-156mV, +/-156mV, 0-1.25V.

Slot 5 (BX-08AD-2B):

Chapter 15: BX-MBIO Modbus I/O Controller

The BX-08AD-2B is installed in slot 5 in this example. The BX-08AD-2B module has the following conﬁguration options:

(i) Channels Enabled: (1–8)

(ii) Range for Input Channels 1 to 8: There is a conﬁguration ﬁeld

for each channel. Available choices are: 0-5V, 0-10V, +/-5V, +/-10V.

Slot 6 (BX-08DA-2B):

The BX-08DA-2B is installed in slot 6 of this example. The BX-08DA-2B module has the following conﬁguration options:

(i) Channels Enabled: (1–8)

(ii) Range for Output Channels 1 to 8: There is a conﬁguration

ﬁeld for each channel. Available choices are: 0–5V, 0–10V, ±5V, ±10V.

BRX User Manual, 4th Edition, Rev. F

15-25

Page 26

Chapter 15: BX-MBIO Modbus I/O Controller

BX-MBIO Conﬁguration, continued

Slot 7 (BX-08AD-1):

The BX-08AD-1 is installed in slot 7 of this example. The BX-08AD-1 module has the following conﬁguration options:

(i) Channels Enabled: (1–8)

(ii) Range for Input Channels 1 to 8: There is a conﬁguration ﬁeld

for each channel. Available choices are: 0–20mA, 4–20mA.

Slot 8 (BX-08DA-1):

The BX-08DA-1 is installed in slot 8 of the sample drop. The BX-08DA-1 module has the following conﬁguration options:

(i) Channels Enabled: (1–8)

(ii) Range for Output Channels 1 to 8: There is a conﬁguration

ﬁeld for each channel. Available choices are: 0–20mA, 4–20mA.

The Back button returns you to the main setup page of the Web conﬁguration page, the Send button writes the modiﬁed information to the BX-MBIO, and the Reset button changes any edits back to default.

To complete editing the Setup Module Conﬁguration, select the Send button. The BX-MBIO will be rebooted in order to use the new conﬁguration. A warning and conﬁrmation message box will be displayed:

If you press the OK button, the new conﬁguration will be written to the BX-MBIO.

15-26

WARNING: Output states are not retained when a new conﬁguration is written to the BX-MBIO. Only authorized persons should write a conﬁguration.

Once the write is complete, a dialog box will conﬁrm “Setup complete.”

BRX User Manual, 4th Edition, Rev. F

Page 27

BX-MBIO Conﬁguration, continued

(g) I/O Mapping

The Modbus I/O Mapping page is viewable by selecting the (g) link. This page displays the Modbus I/O addressing associated with each slot plus error and device information.

Based on the example set of installed modules listed previously, the following Modbus I/O Mapping table is displayed.

Chapter 15: BX-MBIO Modbus I/O Controller

Description column:

Displays the slot number, the module installed in that slot and the Input/Output bits and/or words used by the module. The module part number is a link to the module insert.

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15-27

Page 28

Chapter 15: BX-MBIO Modbus I/O Controller

BX-MBIO Conﬁguration, continued

Inputs column:

Displays the discrete input addressing. The offset is 100000. If a module has discrete input addresses associated with it, the Modbus discrete input address range is shown. For example, in slot 3, the BX-08NA module is mapped to 8 discrete input addresses, 100001 – 100008.

Coils column:

Displays the discrete output addressing. The offset is 0. If a module has discrete output addresses associated with it, the Modbus discrete output range is shown. For example, in slot 1, the BX-05TRS module is mapped to 5 discrete output addresses. However, the addressing is mapped in byte ranges, which means the module takes up 8 bits, 1 – 8. For this module, BX-05TRS, the user will use the ﬁrst 5 bits of the addressed range, 1-5.

Input Regs column:

Displays the input register addressing. The offset is 300000. If a module has input registers associated with it, the Modbus input register range is shown. Input registers are typically used to store analog input values. Input registers are typically read only registers. For example, in slot 4, the BX-04THM module is mapped to 24 discrete input bits and 4 input words. These 4 words are mapped to 4 input registers, 300001 – 300004, one word for each input channel. In this case, data read from channel 1 of the BX-04THM is stored in Modbus input register 300001.

Discrete inputs are also mapped to input registers. For example BX-08NA, an 8-point input module, mapped to 302001 LO. This is the lower 8 bits of the 16-bit word 302001.

Analog and Temperature modules have 24 discrete inputs used as error status ﬂags. These are also mapped to input registers. For example, BX-04THM has 24 discrete input bits mapped to 302001 HI to 302002 input registers. This is the top 8 bits of 302001 and 16 bits of 302002.

Refer to Chapter 8, “BRX Analog I/O Expansion Modules,” for information on the function of the 24 bits associated with Analog I/O and Temperature modules.

Holding Regs column:

Displays the holding register addressing. The offset is 400000. If a module has holding registers associated with it, the Modbus holding register range is shown. Holding registers are typically used to store analog output values or to store variable data used by the system. Holding registers are typically read/write registers. For example, in slot 6, the BX-08DA-2B module is mapped to 24 discrete input bits and 8 output words. These 8 words are mapped to 8 holding registers, 400001 – 400008, one word for each output channel. In this case, data written to channel 1 of the BX-08DA-2B is stored in Modbus holding register 400001.

Discrete inputs are also mapped to holding registers. For example BX-08NA, an 8-point input module, mapped to 411625 LO. This is the lower 8 bits of the 16-bit word 411625.

15-28

Analog and Temperature modules have 24 discrete inputs used as error status ﬂags. These are also mapped to holding registers. For example, BX-04THM has 24 discrete input bits mapped to 411625 HI to 411626 holding registers. This is the top 8 bits of 411625 and 16 bits of 411626.

Refer to Chapter 8, “BRX Analog I/O Expansion Modules,” for information on the function of the 24 bits associated with Analog I/O and Temperature modules.

BRX User Manual, 4th Edition, Rev. F

Page 29

BX-MBIO Conﬁguration, continued

Extra information available in the Modbus I/O mapping table:

Addressing of available error information is mapped to holding registers. Module Error and Bit Per Slot Error can be read from holding registers 410001 and 410002, for this setup. To clear an error, write a value of 0 to the corresponding holding register.

BX-MBIO Diagnostic Information (write 0 to clear):

Data Input Registers Holding Registers

Module Error 410001

Bit Per Slot Error 410002

Reserved* 410003 – 410006

Link Monitor Timeout 410007

* This section is for use by the MBIO operating system. Do not write to this area.

Device Information is comprised of a block of 40 words. A Modbus client (master) can read the entire block or a speciﬁc portion.

Chapter 15: BX-MBIO Modbus I/O Controller

BX-MBIO Device Information

Data Input Registers Holding Registers

Firmware Version 307001 – 307006 419251 – 419256

Millisecond Tick 307007 – 307008 419257 – 419258

Reserved* 307009 – 307015 419259 – 419265

MAC Address 307016 – 307018 419266 – 419268

Reserved* 307019 – 307022 419269 – 419271

DIP Switches 307022 419272

Reserved* 307023 – 307035 419273 – 419285

IP Addressing 307036 – 307041 419286 – 419291

* This section is for use by the MBIO operating system. Do not write to this area.

The Device Information displays items from those available in the table above. These are as follows: (1) Firmware Version: six words hold information on the Firmware and Booter version of the

BX-MBIO, mapped to input registers 307001-307006 and to holding registers 419251-419256.

BX-MBIO Firmware and Booter versions: Firmware: 4.1.299 Booter: 4.1.128

Modbus Input Register

307001 419251 4

307002 419252 1

307003 419253 299 most signicant word

307004 419254 4

307005 419255 1

307006 419256 128 most signicant word

Modbus Holding Register

MAC address value viewed as Signed Decimal

least signicant word

Hold the Firmware version

least signicant word

Hold the Booter version

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Chapter 15: BX-MBIO Modbus I/O Controller

BX-MBIO Conﬁguration, continued

(2) Millisecond Tick: Two words hold information on the Millisecond Tick clock of the BX-MBIO,

which could be used to indicate communications is active with the BX-MBIO, mapped to input registers 307007-307008 and to holding registers 419257-419258.

BX-MBIO Millisecond Tick

Modbus Input Register

307007 419257 0xE000 least signicant word

307008 419258 0x3062 most signicant word

(3) MAC Address: Three words hold information on the MAC address of the BX-MBIO, mapped

to input registers 307016-307018 and to holding registers 41 9266-419268.

BX-MBIO MAC address: 00:E0:62:30:0A:34

Modbus Input Register

307016 419266 0xE000 least signicant word

307017 419267 0x3062

307018 419268 0x340A most signicant word

Modbus Holding Register

MAC address value viewed as HEX

(4) DIP Switches: One word holds information about the position of the DIP Switches of the

BX-MBIO, which provides the status of the DIP switch position, mapped to input register 307022 and holding register 419272.

BX-MBIO DIP Switch: Example with DIP Switches 0 to 3 ON, serial port Station # 15

Modbus Input Register

307022 419272

Modbus Holding Register

(5) IP Addressing: Six words hold information about the IP address, the Gateway address, and

the Subnet mask of the BX-MBIO, mapped to input registers 307036-307041 and to holding registers 419286-419291.

DIP Switch value viewed as Unsigned Decimal

DIP Switch value viewed in Binary

0000 0000 0000 1111

msb -------------------lsb

BX-MBIO IP and Subnet address: IP: 10.1.15.221 Gateway: 192.168.2.1 Subnet: 255.255.255.0

MAC Modbus Input Register

307036 419286 0x010A where: 01 = 1, 0A = 10

307037 419287 0xDD0F where: DD = 221, 0F = 15 most signicant word

307038 419288 0xA8C0 where: A8 = 168, C0 = 192

307039 419289 0x0102 where: 01 = 1, 02 = 2 most signicant word

307040 419290 0xFFFF where: FF = 255, FF = 255

307041 419291 0x00FF where: 00 = 0, FF = 255 most signicant word

Modbus Holding Register

address

value

viewed in

HEX

IP Address

Gateway address

Subnet mask

least signicant word

15-30

BRX User Manual, 4th Edition, Rev. F

Page 31

UPDATED

BX-MBIO Conﬁguration, continued

(h) Booter Version

This ﬁeld displays the current booter version of the BX-MBIO controller. This is a ﬁxed ﬁeld. It is necessary to use the NetEdit 3 utility to update the booter.

(i) OS Version

This ﬁeld displays the current OS version of the BX-MBIO controller. This is a ﬁxed ﬁeld. It is necessary to use the NetEdit 3 utility to update the OS.

(j) Firmware Updates

This ﬁeld contains a link to the ﬁrmware download location on the HOST Engineering website: Hosteng.com (http://www.hosteng.com/hw-products/ﬁrmware.htm).

(k) NetEdit Download

This ﬁeld contains a link to the NetEdit 3 utility download page: http://www.hosteng.com/ sw-products/netedit3.htm.

(l) BRX User Manual

This ﬁeld contains a link to the BRX user manual web page: http://www.automationdirect.com/pn/ doc/manual/BX-MBIO.

Chapter 15: BX-MBIO Modbus I/O Controller

(m) BRX Spec Sheet

This ﬁeld contains a link to the BX-MBIO-M insert page: http://www.automationdirect.com/pn/ doc/spec/BX-MBIO.

List of modules supported by BX-MBIO

Number of Points

Module

Discrete IO

BX-08NF3 8 1–8 1 02 100001–100008

BX-08ND3 8 1–8 1 02 100001–100008

BX-08NB 8 1–8 1 02 100001–100008

BX-08NA 8 1–8 1 02 100001–100008

BX-08SIM 8 1–8 1 02 100001–100008

BX-12ND3 12 1–12

BX-12NB 12 1–12

BX-12NA 12 1–12

BX-16NF3 16 1–16 2 02 100001–100016

BX-16ND3 16 1–16 2 02 100001–100016

BX-16NB 16 1–16 2 02 100001–100016

BX-16NA 16 1–16 2 02 100001–100016

BX-32ND3 32 1–16, 17–32 4 02

BX-05TRS 5 1–5

BX-05TRS-1 5 1–5

BX-08TD1 8 1–8 1 01, 05, 15 000001–000008

BX-08TD2 8 1–8 1 01, 05, 15 000001–000008

BX-08TR 8 1–8 1 01, 05, 15 000001–000008

Table continued on next page

In Out

Address Offset Bytes Used

2 02 100001–100016

1 01, 05, 15 000001–000008

Function Codes

Example Addressing: Module Installed in Slot 1

100001–100016 100017–100032

BRX User Manual, 4th Edition, Rev. F

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Chapter 15: BX-MBIO Modbus I/O Controller

BX-MBIO Conﬁguration, continued

List of modules supported by BX-MBIO (continued)

Number of Points

Module

BX-08TRZ 8 1–8 1 01, 05, 15 000001–000008

BX-08TA 8 1–8 1 01, 05, 15 000001–000008

BX-12TD1 12 1–12

BX-12TD2 12 1–12

BX-12TR 12 1–12

BX-12TA 12 1–12

BX-16TD1 16 1–16 2 01, 05, 15 000001–000016

BX-16TD2 16 1–16 2 01, 05, 15 000001–000016

BX-16TF2 16 1–16 2 01, 05, 15 000001–000016

BX-16TR 16 1–16 2 01, 05, 15 000001–000016

BX-16TRZ 16 1–16 2 01, 05, 15 000001–000016

BX-32TD1 32 1–16, 17–32 4 01, 05, 15

BX-32TD2 32 1–16, 17–32 4 01, 05, 15

BX-08CD3R 4 4

BX-12CD3D1 8 4

BX-12CD3D2 8 4

BX-16CD3D1 8 8

BX-16CD3D2 8 8

BX-12CF3F2 8 8

Analog IO

BX-04ADM-1 4

BX-04AD-1 4

BX-08AD-1 8

BX-16AD-1 16

BX-04AD-2B 4

BX-08AD-2B 8

BX-16AD-2B 16

BX-04AD-3 4

BX-08AD-3 8

BX-04DA-1 4

Table continued on next page

In Out

Address Offset Bytes Used

Input: 1–43 Output: 1–4

Input: 1–8 Output: 1–4

Input: 1–8 Output: 1–8

Data Words: 1–4 Status Flags4: 1–24

Data Words: 1–8 Status Flags4: 1–24

Data Words: 1–16 Status Flags4: 1–24

Data Words: 1–4 Status Flags4: 1–24

Data Words: 1–8 Status Flags4: 1–24

Data Words: 1–16 Status Flags4: 1–24

Data Words: 1–4 Status Flags: 1–8

Data Words: 1–8 Status Flags: 1–8

Data Words: 1–4 Status Flags4: 1–24

UPDATED

Function Codes

2 01, 05, 15 000001–000016

1 1

2 (per word) 304

2 (per word) 104

2 (per word) 303, 06, 16 02400001–400004

02 01, 05, 15

Example Addressing: Module Installed in Slot 1

100001–100016 100017–100032

100001–1000083 000001–000008

100001–100008 000001–000008

300001–300004 100001–100024

300001–300008 100001–100024

300001–300016 100001–100024

300001–300004 100001–100024

300001–300008 100001–100024

300001–300016 100001–100024

300001–300004 100001–100008

300001–300008 100001–100008

100001–100024

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Page 33

BX-MBIO Conﬁguration, continued

List of modules supported by BX-MBIO (continued)

Number of Points

Module

BX-08DA-1 8

BX-04DA-2B 4

BX-08DA-2B 8

BX-04DA-3 4

BX-08DA-3 8

BX-2AD2DA-1 2 2

BX-4AD2DA-1 4 2

BX-2AD2DA-2B 2 2

BX-4AD2DA-2B 4 2

BX-2AD2DA-3 2 2

BX-4AD4DA-3 4 4

Temperature

BX-04THM 4

BX-08THM 8

BX-06RTD 6

BX-04UT 4

BX-08UT 8

BX-08NTC 8

Table continued on next page

In Out

Address Offset Bytes Used

Data Words: 1–8 Status Flags4: 1–24

Data Words: 1–4 Status Flags4: 1–24

Data Words: 1–8 Status Flags4: 1–24

Data Words: 1–4 Status Flags: 1–8

Data Words: 1–8 Status Flags: 1–8

Input Data Words: 1–2 Output Data Words: 1–2 Status Flags4: 1–24

Input Data Words: 1–4 Output Data Words: 1–2 Status Flags4: 1–24

Input Data Words: 1–2 Output Data Words: 1–2 Status Flags4: 1–24

Input Data Words: 1–4 Output Data Words: 1–2 Status Flags4: 1–24

Input Data Words: 1–2 Output Data Words: 1–2 Status Flags: 1–8

Input Data Words: 1–4 Output Data Words: 1–4 Status Flags: 1–8

Data Words: 1–4 Status Flags (Bits)4: 1–24

Data Words: 1–8 Status Flags (Bits)4: 1–24

Data Words: 1–6 Status Flags (Bits)4: 1–24

Data Words: 1–4 Status Flags (Bits): 1–16

Data Words: 1–8 Status Flags (Bits): 1–16

Data Words: 1–8 Status Flags (Bits)4: 1–24

Chapter 15: BX-MBIO Modbus I/O Controller

Function Codes

2 (per word) 303, 06, 16 02400001–400008

2 (per word) 303, 06, 16 02400001–400004

2 (per word) 303, 06, 16 02400001–400008

2 (per word) 103, 06, 16 02400001–400004

2 (per word) 103, 06, 16 02400001–400008

2 (per word) 2 (per word) 3

2 (per word) 2 (per word) 1

2 (per word) 304

2 (per word) 204

2 (per word) 304

04 03, 06, 16 02

Example Addressing: Module Installed in Slot 1

100001–100024

100001–100008

300001–300002 400001–400002 100001–100024

300001–300004 400001–400002 100001–100024

300001–300002 400001–400002 100001–100024

300001–300004 400001–400002 100001–100024

300001–300002 400001–400002 100001–100008

300001–300004 400001–400002 100001–100008

300001–300004 100001–100024

300001–300008 100001–100024

300001–300006 100001–100024

300001–300004 100001–100016

300001–300008 100001–100016

300001–300008 100001–100024

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Chapter 15: BX-MBIO Modbus I/O Controller

BX-MBIO Conﬁguration, continued

List of modules supported by BX-MBIO (continued)

Number of Points

Module

BX-4RTD4DA-1 4 4

BX-4THM4DA-1 4 4

BX-4UT4DA-3 4 4

BX-4UT4TD1 4 4

BX-4UT4TD2 4 4

BX-4UT4TR 4 4

1. The 12-point modules use 12 addressing bits, but they are mapped to 16 bits (two bytes). Addressing follows a Byte boundary.

2. The 5-point module uses 5 addressing bits, mapped to 8 bits (one byte). Addressing follows a Byte boundary.

3. The 8- and 12-point combo modules with four input or four output points use 4 addressing bits, but are mapped to 8 bits (one byte). Addressing follows a Byte boundary.

4. Module uses 24 bits as Status Flags. These are mapped to 24 addressing bits (3 bytes). Addressing follows a Byte boundary.

In Out

Address Offset Bytes Used

Input Data Words: 1–4 Output Data Words: 1–4 Status Flags (Bits)4: 1–24

Input Data Words: 1–4 Output Data Words: 1–4 Status Flags: 1–8

2 (per word) 2 (per word) 3

2 (per word) 2 (per word) 1

Function Codes

04 03, 06, 16 02

Example Addressing: Module Installed in Slot 1

300001–300004 400001–400002 100001–100024

300001–300004 400001–400002 100001–100008

Troubleshooting with Modbus Poll

Detailed Example: Using the Modbus Poll Utility to Verify Communications With BX-MBIO

This example explains how to use the Modbus client utility, Modbus Poll, to establish communications with a BX-MBIO Modbus server (slave) and read and write information related to the discrete and analog I/O modules connected to the BX-MBIO.

For this test, the following hardware will be used:

• Slot 0: BX-MBIO-M

• Slot 1: BX-05TRS

• Slot 2: BX-08TR

• Slot 3: BX-08NA

• Slot 4: BX-04THM

• Slot 5: BX-08AD-2B

• Slot 6: BX-08DA-2B

• Slot 7: BX-08AD-1

• Slot 8: BX-08DA-1

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Troubleshooting with Modbus Poll, continued

Start by wiring the modules to provide live data for the test:

1. Wire the BX-08TR to the BX-08NA. When an output point is turned on, the corresponding input will turn on.

2. Wire the BX-08AD-2B to the BX-08DA-2B and wire the BX-08AD-1 to the BX-08DA-1. When a value is written to an analog output channel, the corresponding input channel should read a value that is approximately the same as the output value. For example, if a value of 32750 is written to BX-08DA-1, we would expect the BX-08AD-1 to read a value of 32750 or very close to it. Note that the values may not be identical due to the nature of analog I/O.

Connect the BX-MBIO to the same network switch as the PC running the Modbus Poll utility. It is also possible to connect a PC Ethernet port directly to the BX-MBIO. Apply power to the unit.

Open the NetEdit 3 utility and select the BX-MBIO on the list. Under the MBIO Settings table, click on the General button to conﬁgure the IP address and the subnet mask:

From the example above, the test BX-MBIO is conﬁgured with IP address of 10.1.15.221 and a subnet mask of 255.255.255.0. If needed, a Gateway address can be conﬁgured here.

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Troubleshooting with Modbus Poll, continued

Using NetEdit 3, select the Start Web based Conﬁg button to open the Web based conﬁguration page, as shown below:

Open the Module setup by clicking on the Setup Module Conﬁguration link. This page displays each of the modules connected to the BX-MBIO, as explained on page 15-24. Edit the conﬁguration of the analog modules to meet your test requirements.

For this test:

1. Slots 1 to 3 are discrete I/O and do not need to be conﬁgured.

2. Slot 4, BX-08THM: Enabled 4 channels, all for type J thermocouple.

3. Slot 5, BX-08AD-2B: Enabled 8 channels, all for 0–10 VDC.

4. Slot 6, BX-08DA-2B: Enabled 8 channels, all for 0–10 VDC.

5. Slot 7, BX-08AD-1: Enabled 8 channels, all for 4–20 mA.

6. Slot 8, BX-08DA-1: Enabled 8 channels, all for 4–20 mA.

Once edits are made, click on the Send button to write the new conﬁguration to the ﬂash memory.

At this point, we have a BX-MBIO that is powered up and available on the network with a proper IP address. The discrete and analog I/O modules are properly installed and the analog I/O have been conﬁgured.

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Troubleshooting with Modbus Poll, continued

From the main BX-MBIO Web conﬁguration page select the Display Modbus I/O Mapping link. The following chart shows the Modbus mapping for each module.

We will use the mapping in Modbus Poll to read/write data.

For this test we will use the following addresses:

Slot 1: BX-05TRS. Modbus coils 1–8.

Slot 2: BX-08TR. Modbus coils 9–16.

Slot 3: BX-08NA. Modbus discrete inputs 100001–100008.

When Coil 9 is turned on, discrete input 100001 will come on.

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Troubleshooting with Modbus Poll, continued

Slot 4: BX-04THM.

Modbus Input Registers 300001–300004. If a type J thermocouple is wired to channel 1 to read room temperature, the reading will be read in Input Register 300001. There are 24 status ﬂag bits associated with this module mapped to discrete inputs 100009–1000032. The table below shows the addressing for the status ﬂags.

Error Flag Speciﬁcations

MSB LSB

1st Byte of status ags 100011 100010 100009

Module Status

2nd Byte of status ags 100020 100019 100018 100017

Channel Out of Range

3rd Byte of status ags 100028 100027 100026 100025

Channel Open (Burn Out)

Slot 5:

BX-08AD-2B. Modbus Input Registers 300005–300012. If a transducer is wired to channel 1, the value is read in Input Register 300005. There are 24 status ﬂag bits associated with this module, mapped to discrete inputs 100033–100056. The table below shows the addressing for the status ﬂags.

- - - - -

- - - - Channel 4 Channel 3 Channel 2 Channel 1

Data Not

Valid

Missing

24VDC

Self Test

Failed

Error Flag Speciﬁcations

MSB LSB

1st Byte of status ags 100035 100034 100033

Module Status

2nd Byte of status ags

Channel Out of Range

3rd Byte of status ags

Unused

- - - - -

100048 100047 100046 100045 100044 100043 100042 100041

Channel 8Channel 7Channel 6Channel 5Channel 4Channel 3Channel 2Channel

- - - - - - - -

Data Not

Valid

Missing 24VDC

Self Test

Failed

Slot 6:

BX-08DA-2B. Modbus Holding Registers 400001–400008. If channel 1 is used to drive the speed reference of a VFD, the value is written to Holding Register 400001. There are 24 status ﬂag bits associated with this module, mapped to discrete inputs 100057–100080. The table below shows the addressing for the status ﬂags.

Error Flag Speciﬁcations

MSB LSB

1st Byte of status ags 100059 100058 100057

Module Status

2nd Byte of status ags

Unused

3rd Byte of status ags

Unused

- - - - -

- - - - - - - -

Data Not

Valid

Missing

24VDC

Self Test

Failed

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Troubleshooting with Modbus Poll, continued

Slot 7:

BX-08AD-1. Modbus Input Registers 300013–300020. If a transducer is wired to channel 1, the value is read in Input Register 300013. There are 24 status ﬂag bits associated with this module, mapped to discrete inputs 100081–100104. The table below shows the addressing for the status ﬂags.

Error Flag Speciﬁcations

MSB LSB

1st Byte of status ags 100083 100082 100081

Module Status

2nd Byte of status ags

Channel Open (Broken Transmitter)

3rd Byte of status ags

Unused

- - - - -

100096 100095 100094 100093 100092 100091 100090 100089

Channel 8Channel 7Channel 6Channel 5Channel 4Channel 3Channel 2Channel

- - - - - - - -

Data Not

Valid

Missing 24VDC

Self Test

Failed

Slot 8:

BX-08DA-1. Modbus Holding Registers 400009-400016. If channel 1 is used to drive the speed reference of a VFD, the value is written to Holding Register 400009. There are 24 status ﬂag bits associated with this module, mapped to discrete inputs 100105-100128. The table below shows the addressing for the status ﬂags.

Error Flag Speciﬁcations

MSB LSB

1st Byte of status ags 100107 100106 100105

Module Status

2nd Byte of status ags

Unused

3rd Byte of status ags

Unused

- - - - -

- - - - - - - -

Data Not

Valid

Ready to connect with the Modbus Poll

We have all the information we need to connect with our target BX-MBIO, as summarized below:

1. IP Address of BX-MBIO: 10.1.15.221

Missing

24VDC

Self Test

Failed

2. Coil addresses: 000001–000016. This covers the two relay output modules.

3. Discrete inputs: 100001–100128. This covers the discrete input addresses and the set of 24 status ﬂags for each of the 5 analog I/O and temperature modules.

4. Input Registers: 300001–300020. This covers the analog and temperature input modules.

5. Holding Registers: 400001–400016. This covers the analog output modules.

With Modbus Poll running, we will start by setting up the read and write blocks for each group of addressing.

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Troubleshooting with Modbus Poll, continued

For coils related to BX-05TRS and BX-08TR, use the Mbpoll1 window. Write to coils 1 to 16:

1. From the Display menu, select PLC Address (Base 1).

2. From the Setup menu, select Read/Write Deﬁnition.

a. Slave ID = 1, change to match BX-MBIO module ID.

b. Function = 15 Write Multiple Coils

c. Address = 1

d. Length = 16

e. Scan rate = 1000ms (user preference)

f. View rows = 20 (user preference)

For discrete inputs related to the BX-08NA and the four groups of 24 status ﬂags related to the analog and temperature modules, use the Mbpoll2 window. Read from discrete inputs 100001 to 100128.

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Troubleshooting with Modbus Poll, continued

1. From the Display menu, select PLC Address (Base 1).

2. From the Setup menu, select Read/Write Deﬁnition.

a. Slave ID = 1, change to match BX-MBIO module ID.

b. Function = 02 Read Discrete Inputs

c. Address = 1

d. Length = 128

e. Scan rate = 1000ms (user preference)

f. View rows = 20 (user preference)

For input registers related to the BX-04THM, BX-08AD-2B and BX-08AD-1 modules, use the Mbpoll3 window. Read from input registers 300001 to 300020.

1. From the Display menu, select PLC Address (Base 1).

2. From the Setup menu, select Read/Write Deﬁnition.

a. Slave ID = 1, change to match BX-MBIO module ID.

b. Function = 04 Read Input Registers

c. Address = 1

d. Length = 20

e. Scan rate = 1000ms (user preference)

f. View rows = 10 (user preference)

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Troubleshooting with Modbus Poll, continued

For holding registers related to the BX-08DA-2B and BX-08DA-1 modules, use the Mbpoll4 window. Read from holding registers 400001 to 400016.

1. From the Display menu, select PLC Address (Base 1).

2. From the Setup menu, select Read/Write Deﬁnition.

a. Slave ID = 1, change to match BX-MBIO module ID.

b. Function = 16 Write Multiple Registers

c. Address = 1

d. Length = 16

e. Scan rate = 1000ms (user preference)

f. View rows = 10 (user preference)

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Troubleshooting with Modbus Poll, continued

Once each addressing group is conﬁgured, the Modbus Poll screen should look as follows (user must re-size windows):

From the Connect menu, select Connect, to establish a connection with the BX-MBIO.

To setup the connection:

1. Connection = select TCP/IP.

2. Response timeout = 1000ms

3. Delay Between Polls = 10ms

4. IP Address = 10.1.15.221, the IP address of BX-MBIO

5. Port = 502

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Chapter 15: BX-MBIO Modbus I/O Controller

Troubleshooting with Modbus Poll, continued

Let’s Get Some Values

Now that everything is wired, conﬁgured and mapped in Modbus Poll, we can write an output and see the corresponding input turn on. We will write an output from BX-08TR and that should turn on an input on the BX-08NA. We will then write a value to the analog output modules, BX-08DA-2B and BX-08DA-1 and we will see the input channel on the BX-08AD-2B and BX-08AD-1 display a value in the range of the output value.

Discrete I/O: BX-08TR to BX-08NA

• Coil 000009 turns on input 100001

• Coil 000010 turns on input 100002

• Coil 000011 turns on input 100003

• Coil 000012 turns on input 100004

• Coil 000013 turns on input 100005

• Coil 000014 turns on input 100006

• Coil 000015 turns on input 100007

• Coil 000016 turns on input 100008

Temperature input: BX-04THM wired to thermocouple

• Channel 1 data read to 300001

• Channel 2 data read to 300002

• Channel 3 data read to 300003

• Channel 4 data read to 300004

Analog I/O, voltage: BX-08DA-2B to BX-08AD-2B

• Output driven by 400001 wired to input value in 300005

• Output driven by 400002 wired to input value in 300006

• Output driven by 400003 wired to input value in 300007

• Output driven by 400004 wired to input value in 300008

• Output driven by 400005 wired to input value in 300009

• Output driven by 400006 wired to input value in 300010

• Output driven by 400007 wired to input value in 300011

• Output driven by 400008 wired to input value in 300012

Analog I/O, current: BX-08DA-1 to BX-08AD-1

15-44

• Output driven by 400009 wired to input value in 300013

• Output driven by 400010 wired to input value in 300014

• Output driven by 400011 wired to input value in 300015

• Output driven by 400012 wired to input value in 300016

• Output driven by 400013 wired to input value in 300017

• Output driven by 400014 wired to input value in 300018

• Output driven by 400015 wired to input value in 300019

• Output driven by 400016 wired to input value in 300020

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Chapter 15: BX-MBIO Modbus I/O Controller

Additional BX-EBC100 and BX-MBIO Modbus Mapping Information

Modbus Mapping for I/O

BX-EBC100 and BX-MBIO Discrete Input and Output Modbus Mapping

Modbus Data Type (Bit) Memory Type

Coil Discrete Output

Input Discrete Inputs

BX-EBC100 and BX-MBIO Analog Input and Output Modbus Mapping

Modbus Data Type (Word) Memory Type

Input Register Analog Input Register

Holding Register Analog Output Register 400001 – 400128 128 (256) R/W

Address Range Bit

(Input/Hold Registers)

000001 – 000512

(402001 – 402032)

100001 – 100512

(302001 – 302032)

(411625 – 411656)"

Address Range

Input/Hold Registers

300001 – 300128

(412251 – 412378)

Words (Bytes/Bits) Access

32 (64/512) R/W

32 (64/512) R

Words (Bytes) Access

128 (256) R

System Memory Modbus Mapping

BX-EBC100 and BX-MBIO System Memory Modbus Mapping

Input Registers

307001

Version Data

MS Tick Data

Reserved* 307009 – 307010 2 (4) Used by the System

Device Data

Table continued on next page

307002 307003 307004 307005 307006

307007 – 307008 419257 – 419258 2 (4) Millisecond Tick Data Registers R

307011 307012 307013 307014 307015 307016 – 307018 307019 307020 307021 307022 307023 307024 – 307027 307028 307029 307030 307031 307032 307033 307034 307035 307036 – 307041 307042 – 307100

Holding Registers

419251 419252 419253 419254 419255 419256

419261 419262 419263 419264 419265 419266 – 419268 419269 419270 419271 419272 419273 419274 – 419277 419278 419279 419280 419281 419282 419283 419284 419285 419286 – 419291 419292 – 419350

Words (Bytes)

6 (12)

90 (180)

Description Access

1 - OS Major Version 2 - OS Minor Version 3 - OS Build Version 4 - Booter Major Version 5 - Booter Minor Version 6 - Booter Build Version

1 - Version of Device 2 - Family 3 - Processor 4 - Module Type 5 - Status Code (6-8) - Ethernet Address 9 - RAM Size 10 - Flash Size 11 - Batt Switch 12 - DIP Settings 13 - Media Type (14-17) - Reserved* 18 - Model Number 19 - Ethernet Speed 20 - Reserved* 21 - IO -tal Byte Count 22 - Bit Input Byte Count 23 - Bit Output Byte Count 24 - Non-bit Input Byte Count 25 - Non-bit Output Byte Count (26-31) - IP Conguration (32-90) Reserved*

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Additional BX-EBC100 & BX-MBIO Modbus Mapping Info, continued

BX-EBC100 and BX-MBIO System Memory Modbus Mapping (continued)

Input Registers

Module IDs 307101 – 307109 419351 – 419359 9 (18)

307201 – 307204

Module Information

I/O Module Status

Reserved* 404001 – 408096 4096 (8192) Used by system

Dynamic Data

Reserved* 410021 – 410276 256 (512) Used by system

Reserved* 411125 – 411188 64 (128) Used by system

Reserved* 419259 – 419260 2 (4) Used by system

Reserved* 460001 – 460200 200 (400) Used by system

* Reserved - used by system. User should not write to these addresses.

Slot 1 307205 307206 307207 307208

307209 – 307236

307401 – 307420

Slot 1 307421

307422 307423 – 307440

307441 – 307580

307581 – 307600

Holding Registers

419451 – 419454

Slot 1 419455 419456 419457 419458

419459 – 419486

419651 – 419670

Slot 1 419671

419672 419673 – 419690

419691 – 419830

419831 – 419850

410001

410002 – 410006 410007

410008 – 410020

Words (Bytes)

36 (72)

200 (400)

20 (40)

Description Access

I/O module ID numbers per slot location.

Address 307102 (419352) is for the rst expansion I/O

module, Slot 1.

(4 words per slot) Slot 0 words; Reserved*

Slot 1 words: 1 - Bit Input Count 2 - Bit Output Count 3 - Non-bit Input Count 4 - Non-bit Output Count

Words for Slot 2 to Slot 8

(20 words per slot) Slot 0 words; Reserved*

Slot 1 words: 1 - Flags with bits indicating presence of an Error Bit 0: If set, indicates that Error Value is non-zero

2 - Error Code - refer to Error Codes Table. 3 - 20: Reserved*

Words for Slot 2 to Slot 8

Reserved*

Words per BX-EBC100 1 - Refer to Error Codes Table. Bits 0 to 11: Error code. Bit 12: Module error exists. May be triggered by:

1. Internal Error

2. Too much I/O to t into the internal buffer Bits 13 to 15: Reserved for system use.

Example of error E126: 410001 = 4222 = 107E (hex),

Where 126 = 7E (hex), plus 4096 when bit 12 is on. 2–6 - Reserved* 7 -

Link Monitor Timeout (EBC communication watchdog timer) - 0 to disable; range 0 - 10000ms. 8-20 - Reserved*

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Additional BX-EBC100 & BX-MBIO Modbus Mapping Info, continued

Error Codes

BX-EBC100 and BX-MBIO Error Codes

Error Code Description Additional Information

E000 No Error

E013 This is a buffer overow condition

E119 Data not valid.

E126 Module is write protected.

E165 Module conguration is incorrect.

This error indicates an internal buffer overow condition that should be reported.

This error indicates that more I/O was found in the system than the rmware can handle.

Can also be an internal error that should be reported.

This Error can show up if the module is activeliy being used by a Do-more! PLC. Also, this error may be the result of DIP switch 5 being on which write-protects the module. Several functions are not available while the module is being used from a Do-more! PLC.

This Error indicates that the I/O conguration has changed from what has been stored for things such as analog cong data. Moving congured analog modules around in the base will cause this error. The conguration will need to be re-written to x this.

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Chapter 15: BX-MBIO Modbus I/O Controller

Notes:

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