Seneca Z-LINK2-LO User manual

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USER MANUAL
Z-LINK2-LO
Modbus Gateway – Remote IO radio and repeater
with Lora technology

USER MANUAL - Z-LINK2-LO
2
Date
Revision
Note
Author
Code
11/04/2023
1
First edition
MM
MI00610-1
11/04/2023
1
Translated into
English
MM
MI00610-2

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Contents
SENECA..............................................................................................................................4
Z-LINK2-LO.........................................................................................................................4
1. INTRODUZIONE...........................................................................................................5
1.1. FUNZIONE REPEATER (RIPETITORE) ...................................................................8
1.2. NUMERO MASSIMO DI Z-LINK2-LO........................................................................8
2. Z-LINK2-LO MODALITÀ BRIDGE................................................................................8
IMPOSTAZIONE DI Z-LINK2-LO COME MODALITÀ “BRIDGE” ....................................11
3. Z-LINK2-LO "MODALITÀ I/O REMOTO"...................................................................14
3.1. IMPOSTAZIONE DI Z-LINK2-LO COME "MODALITÀ I/O REMOTO"...................16
3.1.1. IMPOSTAZIONE DELLO Z-LINK2-LO COME "REMOTE I/O MASTER
MODBUS". ........................................................................................................................17
3.1.2. IMPOSTAZIONE DELLO Z-LINK2-LO COME "REMOTE I/O SLAVE MODBUS".
26
4. PROTOCOLLO MODBUS RTU..................................................................................28
5. AGGIORNAMENTO DEL FIRMWARE.......................................................................29
6. DIAGNOSTICA DEL FUNZIONAMENTO TRAMITE I LED........................................30
6.1. FUNZIONAMENTO DEI LED IN BASE ALLA MODALITA’ DI FUNZIONAMENTO
30
6.1.1. BRIDGE MASTER MODBUS / REMOTE I/O MASTER MODBUS......................30

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6.1.2. BRIDGE SLAVE MODBUS / REMOTE I/O SLAVE MODBUS ............................30
7. SOLUZIONI AI PROBLEMI ........................................................................................31
Seneca
Z-LINK2-LO
ATTENTION!
IN NO EVENT, SHALL SENECA S.R.L. OR ITS SUPPLIERS BE LIABLE FOR LOSS OF REGISTRATION
DATA/INCOME OR FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES RESULTING FROM
NEGLIGENCE OR THE IMPROPER OR IRRESPONSIBLE USE OF Z-LINK2-LO, EVEN IF SENECA IS
AWARE OF SUCH POSSIBLE DAMAGES.
SENECA, ITS SUBSIDIARIES, AFFILIATES, GROUP COMPANIES, ITS SUPPLIERS AND ITS DEALERS DO
NOT WARRANT THAT THE FUNCTIONS WILL FULLY MEET YOUR EXPECTATIONS OR THAT Z-LINK2-
LO, THE FIRMWARE AND THE SOFTWARE ARE ERROR-FREE OR WORK IN A CONTINUOUS WAY.

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1. INTRODUCTION
The Z-LINK2-LO device is designed to transparently transfer serial packets over a wireless network.
The simplified outline of Z-LINK2-LO is:
The Z-LINK2-LO USB port can only be used for programming Z-LINK2-LO from a Windows™ PC with the Easy
Setup software.
For the connection with Modbus RTU devices it is possible to use the RS232 or RS485 port.
The radio connects two or more Z-LINK2-LO devices.
Two working modes are supported: "Bridge Mode" and "Remote I/O Mode".
It is also possible to configure a device as a radio signal repeater.

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The figure shows a typical application of the Z-LINK2-LO device in "Bridge mode" within a ModBUS RTU
network:
In this mode the Modbus fieldbus is transparently connected "over the air".
Note that the Z-LINK2-LO in “Bridge” mode does not act as Modbus Master, an external Modbus Master
“M” device is always required.

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The figure shows a typical application of the Z-LINK2-LO device in "Remote I/O" mode within a ModBUS
RTU network:
The inputs are replicated on the outputs. If the inputs are digital it is possible to negate them, if they are
analogue it is possible to scale their values. A fault condition can be used for safety requirements.
Note that an external Modbus RTU Master device is not required in this mode because the Z-LINK2-LO also
acts as a Modbus RTU Master on the bus.
ATTENTION!
-ONLY THE MODBUS RTU PROTOCOL IS SUPPORTED
-ONLY ONE PORT (RS232 OR RS485) CAN BE USED AT THE SAME TIME.

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1.1. REPEATER FUNCTION
In each of the previous modes it is possible to activate the repeater function. When a Z-LINK2-LO works as a
repeater, the received radio signal is also retransmitted in order to increase the signal range.
1.2. MAXIMUM NUMBER OF Z-LINK2-LOS
There is no maximum number of Z-LINK2-LOs that can be used in a network, but Seneca recommends not
installing more than 30 Z-LINK2-LOs in a single network.
For more complex networks it is possible to use two or more parallel networks by changing the network
key.
2. Z-LINK2-LO BRIDGE MODE
Z-LINK2-LO can be used to connect two or more Modbus RTU buses wirelessly.
Examples of point-to-multipoint connections are shown in the following figures:
The simplest is the point-to-point connection: 1 Modbus master connected to 1 remote Modbus slave:
More complex, it is possible to connect 1 Modbus master with multiple Modbus slaves:

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Furthermore, it is possible to connect 1 Modbus master without local Modbus slaves (point-to-multipoint):
It is also possible to connect Modbus Slaves on the local Modbus master bus:

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If a Z-LINK2-LO is not easily accessible, it is possible to configure one as a "repeater", note that Modbus RTU
Slave devices can also be connected to the repeater: