ZOTECH Z920K-RS485 Guide

WWW.ZOTECH.COM.TW Lasted update 2019/08/30
INTRODUCTION
Hereunder the description includes the package, and operation guides. Before start operating, please kindly read it for quick and correct
installation.
GENERRAL
Package
1. Z920K-RS485 or RS232 Device x1
2. Antenna x1
3. Power Adaptor 100-240Vac /24V[email protected] x1
4. Micro-USB Cable x1
5. Magnetic Adsorptor x1
6. Din-Rail Adaptor (purchase separably) x1
Z920K
-
RS485/Z920K
-
RS232
Getting Start Guide
Micro-USBCable
Z920K
-
RS485
Z920K
-
RS232
PowerAdaptor

Din-RailAdaptor(PurchaseSeparately)
MagneticAdsorptor
SleeveAntenna
V+ (Red )
V- (Black)

2
Z920K
-
RS485
Serial Port Setting
• Protocol Modbus RTU/ASCII code
• Port Type I-RS485-2W D+/D-/GND Note: D+ (red cord)/D- (black cord) of power adaptor
• Data indicators TX/Green, RX/Yellow
• SW2 RS485 D+/D- resistors and Terminal Resistor setting for impedance match.
Note:“120 ohm” Terminal Res. is recommended to avoid a noise bounding.
• Port Type II -RS232 DB9
DB9 pin definition
Pin 1 2 3 4 5 6 7 8 9
Definition DCD RX TX DTR GND DSR RTS CTS RI
Power
• DC In (V+/V-)
Unregulated
10-48Vdc or 8-24Vac in
• DC Out (Vo/GND) 12Vdc out (The adaptor has to be used.)
LED indicators:
• LINK:
 Link: Solid Green
 Traffic: 1 Hz blinking
 Link Fail: 1Hz Red Blinking
• PWR
 Power ON ready: Solid green
 Bootup fail: Solid red
• Network
 Normal state (Mesh network ready): Solid Green
Z920K-RS232
1 2 3 4 5
6 7 8 9
ThetopviewofZ920K

3
 Data transmission: Green (10Hz blinking)
 Stop pairing: Green/Red 1Hz blinking simultaneously
 No light: Network unable to join or escape network
• RSSI indication
3 LEDs have those 7 modes to indicate the different RSSI strength as the figure.
SW1 Communication Switch
 Baud Rate (DIP5/DIP6/DIP7)
2400/4800/9600/19200/38400/57600/115200
 Parity (DIP4)
。 Hi: Even
。 Lo: None
 Stop Bit (DIP3)
。 Hi: 2-bit
。 Lo: 1-bit
 HW Flow Control (DIP2)
。 Hi: Enable
。 Lo: Disable
Button/Connector
• Reset
 Click in seconds: SW Reboot
 Hold on more than 10 seconds: Z920K will be recovered as the default factory setting.
• PWR Switch Power switch on/off
• ANT SMA antenna header
• USB Micro-USB connector to plug in USB cable for console configuration
• MODE If the MOD button is asserted for 3 seconds or more, the LED display is cleared.
• PAIR
 For an advanced Z920K version, the BLE pairing is active if the PAIR button is asserted for 3 seconds.
 The BLE pairing is reset, if the PAIR button is asserted for 10 seconds..
TherearviewofZ920K
1 2 3 4 5 6 7
H
L
9600
57600
19200
115200
2400
38400
4800
H
i
L
APP setting
Baud Rate
DIP 5 / 6 / 7
Even
Parity
None
DIP 4
2-bit
Stop Bit
1-bit
DIP 3
Enable
HW Flow Control
Disable
DIP 2
stronger than -55 dBm
-56 dBm ~ -65dBm
-66 dBm ~ -75dBm
-76 dBm ~ -85dBm
-86 dBm ~ -90dBm
-91 dBm ~ -103dBm
weaker than -103dBm
RSSIindication

4
Accessory
• Magnetic Adsorptor
• Din-Rail Adaptor
Magnetic Adsorptor
DIN-Rail Adaptor
Z920K Bottom View
Magnetic Adsorptor Assembly
Combination with a Din-Rail adaptor
Din-Rail Adaptor Assembly

5
CONSOLE UTILITY
To register on the download website https://www.zotech.com.tw/contact-information for agreement to download Console Utility
1. Please install console utility on Window PC
2. To plug the micro-USB cable into Z920K device’s USB connector on the rear panel, and plug the other end of the USB cable into the
maintenance console PC’s USB port.
3. To launch the console utility and follow up the user guide step by step
Start Up
1. After installing the console utility, please click the icon “MH920 Console International” to startup
2. To select the right COM port and set it

6
Configuration
。
.To select Parent (Coordinator) or Child (Router) correctly to setup
。
。 To click “Module setup” for configuration
。
To click “Connect” to start up and “Load from Module” to check the current configuration
Parent Configuration
Child Node Configuration

7
Configuration File
•
Load Configuration
Load the configuration file into Z920K device
• Save Configuration
Save the present configuration file to PC
• Load Default
Recover default setting
•
Save Default
Save the present setting as the default
Mesh Network set up
。 Make sure the following parameters of all of the Parent (coordinator) and Child node (router) to be the same for the same group.
1. PAN ID (group name)
2. Radio channel number
3. Network Name
4. Encryption key
。 Short Address for all of Child nodes ID must be different each other.

8
Communication Configuration
The bit rate means the communication speed between Parent and Child. Please keep at the high speed 115200 bps. Don’t change any
parameters on this page.
Protocol Setup
RS485 Modbus/RTU configuation
 Make sure the protocol type as “Modbus (RTU)”
1. “Station number analysis” is an option if Child nodes are connected with Modbus sensors

9
2. A “Station no. list” has to be set with the sensors ID (Station number) corresponding to the short address of Child node and
“Save to module”.
For example:
。 Sensor Modbus ID1/ID2 are connected with Child node short address 0001
。 Sensor Modbus ID3/ID4/ID5 are connected with Child node short address 0002
。 Sensor Modbus ID6 is connected with Child node short address 0003
RS232 ASCII set up
 RS232 (1-to-1) set up
Configuration:
1. Select “No” for “Station number analysis” on Parent device.
2. Make sure packet filtering is set at “Yes (notification type)” for Parent and Child devices.

10
RS232 (1-to-N) set up
Parent configuration:
1. The station number analysis needs to enable and setup the station no. table as the description on the page 7/8.
2. Please select “Other(ASCII)” as protocol type
3. “Start character code 1” and “Start character code 2” can be set by demand; The initial start character code1 setting is "25".
4. “Station number start position after character code” is to specify the number of bytes that follow the start position
character code.
5. “Station number store area”: Select the number of bytes (1 to 4) for the area where the station number is stored.
6. “Station number size”: Select the number of digits from the end of the station number (1 to 4)
7. “Station number type”: The format of (Decimal ASCII/Hexadecimal ASCII) can be selected for the station number.
8. “Delete the beginning of transmitted data”: While transmitting the data to the child node, can be set to delete the specified
number of bytes (0 to 15 bytes) from the beginning of the receive data by child nodes,

11
Child configuration:
1. “Add sender identification” has to be enabled.
2. Child short address ID will be added in the first two bytes of the transmitted data.
3. Note that the data logger server has to analysis the first two bytes to know where the data come from.
Fixed Route Setup (Child node only)
1. Each Child node can assign the next hopping node (Destination short address) if Fixed route “Yes” is selected.
2. If the Fixed route is set, the mesh hopping also can be set as a backup solution if Temporary detour “Yes” is selected.

12
Status
After the mesh network is finished, the connection status of each Parent or Child node can be checked by clicking [Status].
 The MAC address, PAN ID, Radio channel number, short address, connection status, network name and RSSI (only Child node) will be
shown up.
Topology
All Child nodes in the mesh network can be checked by the [Display Topology] through Parent.
For example: Child nodes 0002 and 0003 are connected directly to Parent without hopping in the topology below.

13
Measurement Tool
For start field installation, please use the measurement tool to decide the communication channel firstly,
then verify communication signal level good enough.
Channel Noise Scan:
Click [Measurement tool] to switch device to measurement mode
1. Mode change
To select [Channel noise scan mode] and Click [Change mode]
2. Launch Tool
 To click [Launch Tool] to open channel noise measurement tool page
 Specify [Scan interval] and [Scan duration]
 Specify the channel number for measurement
 To click [Start] measurement
 Save Result
 Switch back to the normal mode before Z920K start operating

14
PER/RSSI measurement:
After deciding the communication channel, the PER and RSSI have to reconfirm for all of locations of
Child nodes to Parent. A reliable environment is required a lower PER (package error rate)
1. Set one device for communication test (Sender)
 Click [Change mode] to switch device working on [Communication test mode (Sender)], then [Launch tool]
 Open [Com port] and select the decided channel, then click [Save to module]
 Keep power on to start sending test packages
2. Set the other device for communication test (Receiver)
 Click [Change mode] to switch the other device working on [Communication test mode (Receiver)], then [Launch tool]
 Open [Com port] and select the test channel, then click [Save to module]
 Specify [Measurement duration], and click [Start] measurement
 The measurement result can be stored by [Save]
 Switch back to the normal mode before Z920K start operating