Block EB-MODBUS-RTU User manual

Manual
EB-MODBUS-RTU
BLOCK Transformatoren-Elektronik GmbH
Max-Planck-Straße 36-46 27283 . Verden, Germany
10-23-17 / KRUT
Subject to technical changes
Page: 0
EB-MODBUS-RTU
Communication Module Between PLC/PC and EasyB
Single-Channel Circuit Breaker System
Collective Reset Input
2 Potential-Free
Collective Signaling
RS 485/RS 422
Interface

Manual
EB-MODBUS-RTU
BLOCK Transformatoren-Elektronik GmbH
Max-Planck-Straße 36-46 27283 . Verden, Germany
10-23-17 / KRUT
Subject to technical changes
Page: 1
Table of Contents
1. General Information .................................................................................................................2
1.1. Safety Instructions ................................................................................................................ 2
1.2. Qualified Personnel ..............................................................................................................2
1.3. Intended Use.........................................................................................................................2
1.4. Disclaimer ............................................................................................................................2
2. Product Description ................................................................................................................. 3
2.1. Description of the Communication Module.........................................................................3
2.2. Functional Sketch.................................................................................................................3
2.3. Terminals.............................................................................................................................. 4
3. Initialization .............................................................................................................................4
4. Configuration ...........................................................................................................................5
4.1. Dip switch ............................................................................................................................5
4.2. Byte Information ..................................................................................................................6
4.3. Configuration Example 2-Wire............................................................................................ 6
4.4. Configuration Example 4-Wire............................................................................................ 7
5. Communication and Examples ................................................................................................8
5.1. Loopback Diagnostic Test....................................................................................................8
5.2. Status Check.........................................................................................................................8
5.3. Error Message....................................................................................................................... 9
6. Register Overview..................................................................................................................10
6.1. EB-MODBUS-RTU ...........................................................................................................10
6.2. EB Single Channel Circuit Breaker....................................................................................11
6.3. EB Status Byte....................................................................................................................12
6.4. Coding of the Circuit Breaker Currents .............................................................................13
6.5. EB Variants ........................................................................................................................ 13
6.6. Options ...............................................................................................................................14
Please note, as of firmware 1.10 the status
byte has changed
Please note, as of firmware 1.10 the status
byte has changed

Manual
EB-MODBUS-RTU
BLOCK Transformatoren-Elektronik GmbH
Max-Planck-Straße 36-46 27283 . Verden, Germany
10-23-17 / KRUT
Subject to technical changes
Page: 2
1.General Information
1.1. Safety Instructions
Please read these warnings and safety instructions carefully before operating the device.
The device may only be installed by qualified competent personnel. In the event of
malfunctions or damage, switch off the supply voltage immediately and send the device to
Block to be checked. The device does not contain any service components. When an internal
fuse is triggered, there is most likely an internal defect in the device. The data provided are
for product description purposes only and should not be construed as legally guaranteed
properties.
1.2. Qualified Personnel
The product referred to in this documentation may only be operated by qualified personnel,
in compliance with the specific documentation pertinent to the respective task, in particular
the safety instructions and warnings contained therein. Qualified personnel can, as a result
of their training and experience, help to ensure that the use of the described product meets
all safety requirements as well as applicable regulations, provisions, standards, and laws.
1.3. Intended Use
This device is designed for installation within an enclosure and is suitable for use with
general electronic devices, such as industrial controls, office equipment, communications
equipment, and gages. Do not use this device in control systems for airplanes, trains, or
nuclear facilities where a malfunction can result in serious injury or death.
1.4. Disclaimer
The contents of this publication have been checked with great care for concordance with the
described hardware and software. Nevertheless, there may be differences between the
product and the documentation. Deviations may also arise due to the further development
of the product.
For this reason, we cannot guarantee full concordance. Should this documentation contain
any errors, we reserve the right to make necessary corrections without prior notice.

Manual
EB-MODBUS-RTU
BLOCK Transformatoren-Elektronik GmbH
Max-Planck-Straße 36-46 27283 . Verden, Germany
10-23-17 / KRUT
Subject to technical changes
Page: 3
2.Product Description
2.1. Description of the Communication Module
The EB-MODBUS-RTU communication module serves as an interface for connection to a
higher-level controller and is compatible with circuit breakers of the variants EB-08, EB-18,
and EB-38.
To ensure error-free operation, the maximum number of 40 circuit breakers must not be
exceeded.
2.2. Functional Sketch
Note:
•Deviations in the wiring can destroy the modules.

Manual
EB-MODBUS-RTU
BLOCK Transformatoren-Elektronik GmbH
Max-Planck-Straße 36-46 27283 . Verden, Germany
10-23-17 / KRUT
Subject to technical changes
Page: 4
2.3. Terminals
Communication
TxD+, TxD-, Rx+, Rx- 2/4-wire connections
Signal input
RE 24V collective reset input
Signal Contacts
13 Potential-free input
14 Channel triggered and/or switched off
24 Rated current at 90%
Care
IN+ supply voltage input +24VDC (18 - 30V)
3.Initialization
In order for the EB-MODBUS-RTU to communicate with the PLC, the appropriate dip-
switch configuration must be made.
The MODBUS module initializes itself by applying the supply voltage to terminal IN+.
Functional operation is only made possible by connecting circuit breaker modules and
then applying the supply voltage to IN+.
After the supply voltage has been applied, all connected circuit breakers are
addressed one after the other and then selectively switched on one after the other.
Using the EB-MODBUS-RTU module, a maximum of 40 circuit breaker channels can
be addressed and managed.
Note:
•When applying the supply voltage to IN+, it is imperative that a separate GND line is
connected to one of the circuit breaker channels.
•Initialization without a series of circuit breaker modules can lead to faulty behavior.

Manual
EB-MODBUS-RTU
BLOCK Transformatoren-Elektronik GmbH
Max-Planck-Straße 36-46 27283 . Verden, Germany
10-23-17 / KRUT
Subject to technical changes
Page: 5
4.Configuration
4.1. Dip switch
Connection: Receive 2/4-wire
1
2
3
4
5
6
7
8
1
0
Rx 2-Wire
0
1
Rx 4-Wire
Connection: Send 2/4-wire
End of frame time
1 2 3 4 5 6 7 8
0 0 3.5 Byte
0 1 10 ms
1 0 50 ms
1 1 500 ms
1 2 3 4 5 6 7 8
0
0
0
0
Term.+PullUp off
1
1
0
0
RS485 Term.+PullUp/Dn
1
1
1
1
RS422 Term.+PullUp/Dn
ModBus address
1 2 3 4 5 6 7 8
0 0 0 0 1
ModBus addr. 1
x x x x x
ModBus addr. X
1 1 1 1 1
ModBus addr. 31
Baud rate
1 2 3 4 5 6 7 8
0 0 9600 Bd
0 1 4800 Bd
1 0 19200 Bd
1 1 38400 Bd
Parity / stop bits
1
2
3
4
5
6
7
8
0
2 stop, no parity
1
1 stop, parity even

Manual
EB-MODBUS-RTU
BLOCK Transformatoren-Elektronik GmbH
Max-Planck-Straße 36-46 27283 . Verden, Germany
10-23-17 / KRUT
Subject to technical changes
Page: 6
4.2. Byte Information
•1 Start bit
The information byte consists of:
•8 Information bits
•2 stop bits without parity bit or 1 stop, parity bit even
4.3. Configuration Example 2-Wire
2-wire send / receive
EOF = 10 ms
ModBus addr. 1
19200 Bd
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
1
0
0
1
0
0
1
0
0
0
0
1
0
1
0
Slave
EB-MODBUS-RTU
Rx+
Rx- Tx+ Tx-
Rx-
Master
Tx+
Tx-
Rx+

Manual
EB-MODBUS-RTU
BLOCK Transformatoren-Elektronik GmbH
Max-Planck-Straße 36-46 27283 . Verden, Germany
10-23-17 / KRUT
Subject to technical changes
Page: 7
4.4. Configuration Example 4-Wire
2-wire send / receive
EOF = 10 ms
ModBus addr. 1
19200 Bd
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
1
1
1
0
1
0
1
0
0
0
0
1
0
1
0
Slave
EB-MODBUS-RTU
Rx+
Rx- Tx+ Tx-
Rx-
Master
Tx+
Tx-
Rx+

Manual
EB-MODBUS-RTU
BLOCK Transformatoren-Elektronik GmbH
Max-Planck-Straße 36-46 27283 . Verden, Germany
10-23-17 / KRUT
Subject to technical changes
Page: 8
5.Communication and Examples
5.1. Loopback Diagnostic Test
MODBUS
DATA
MODBUS
Addr. Function CRC-L CRC-H Telegram: Master ->
Slave
1
8
0
0
AA
55
5E
94
MODBUS
DATA
MODBUS
Addr. Function CRC-L CRC-H Telegram: Slave ->
Master
1
8
0
0
AA
55
5E
94
5.2. Status Check
Interrogate circuit breaker 1 via EB-MODBUS-RTU
MODBUS
DATA
MODBUS
Addr. Function r/w Start Addr.
Number of
States
CRC
Telegram:
Master -> Slave
Byte
Byte
h-byte
l-byte
h-byte
l-byte
l-byte
h-byte
1
1
1
245
0
1
150
122
CRC
Number of selected circuit breakers
(devices/register addresses always 1)
Circuit breaker 1, status (register address 501)
See: "Overview of Single Channel Circuit Breaker Functions"
Reading the Outputs
MODBUS RTU Address

Manual
EB-MODBUS-RTU
BLOCK Transformatoren-Elektronik GmbH
Max-Planck-Straße 36-46 27283 . Verden, Germany
10-23-17 / KRUT
Subject to technical changes
Page: 9
5.3. Error Message
Addr.
Function
Data
Description
X Func. + 0x80 1 Use of an unsupported short code
2 Use of an unauthorized memory register
3 Wrong value
6
Device cannot process request at the
moment. Repeat request later
8 Field is read-only