Beschreibung
Produkt: Drahtlos Spannungs Datenlogger
Hergestellt von: MICROEDGE INSTRUMENTS (CANADA)
Reihe ： PRECISE-LOG
Modell: PL-VW
PL-VW ist ein 8-Kanal-Spannungsdatenlogger mit Batteriebetrieb, Standalone- und WIFI-Funktion. Der Logger zeichnet acht externe Spannungsquellen auf und speichert Daten im 8-MB-Speicher.
Dank seines Aluminiumgehäuses eignet es sich hervorragend für raueste Industrieumgebungen.
Das eingebettete WIFI-Modul ermöglicht das Überwachen und Herunterladen von Daten aus der Ferne.
Der 16-Bit-ADC eignet sich hervorragend für wissenschaftliche und Laboranwendungen, bei denen präzise und genaue Messungen von entscheidender Bedeutung sind.
Schalten Sie den Logger einfach im WIFI-Bereich ein und greifen Sie von Ihrem Computer aus auf ihn zu, um ihn zu konfigurieren, herunterzuladen, Diagramme anzuzeigen und vieles mehr ...
Eigenschaften:
- 16-Bit-Analog-Digital-Wandler
- 8 Megabyte Speichergröße
- USB und WIFI comm. Schnittstellen mit einer Baudrate von 115200 bps
- Programmierbare Eingangsbereiche (5 VDC, 20 VDC)
- Über 10 Jahre Batterielebensdauer
- Leistungsstarke Software zum Konfigurieren, Herunterladen, Zeichnen, Analysieren und Melden von Alarmen
- Große Auswahl an Abtastintervallen (eine Sekunde bis 12 Stunden)
- Robustes Aluminiumgehäuse
Modbus
From July 15th, 2019, Modbus TCP protocol will be added to all PRECISE-LOG series of data loggers. A Modbus master/client can read one or more Input Registers and Holding Registers available in a PRECISE-LOG data logger through Modbus TCP communications. The below specifications list all supported commands and available registers PL-VW data logger supports:
Input Registers:
An Input Register stores a 16-bit integer for a channel’s real-time reading. To read one or more 16-bit Input register data, use function code 4.
| Register |
Description |
Type |
Range |
| 0 |
CH0 Value |
Unsigned Integer |
0 - 65535 |
| 1 |
CH1 Value |
Unsigned Integer |
0 - 65535 |
| 2 |
CH2 Value |
Unsigned Integer |
0 - 65535 |
| 3 |
CH3 Value |
Unsigned Integer |
0 - 65535 |
| 4 |
CH4 Value |
Unsigned Integer |
0 - 65535 |
| 5 |
CH5 Value |
Unsigned Integer |
0 - 65535 |
| 6 |
CH6 Value |
Unsigned Integer |
0 - 65535 |
| 7 |
CH7 Value |
Unsigned Integer |
0 - 65535 |
Example:
To read CH2, CH3 and CH4's real-time values, a Modbus master device sends in the following command:
| Data(HEX) |
Description |
Note |
| 0001 |
Transaction identifier |
Fixed 2-byte value |
| 0000 |
Protocol identifier |
Fixed 2-byte value |
| 0006 |
Length(6 bytes are followed) |
2-byte value |
| 01 |
The device address |
1-byte value, don't care |
| 04 |
Function Code (read Input Register) |
1-byte value |
| 0002 |
First register's address |
2-byte value |
| 0003 |
The number of required registers (read 3 registers 0002 to 0004) |
2-byte value |
Holding Registers:
A Holding Register stores a 16-bit integer indicating a setting for the data logger. To read one or more 16-bit Holding Register data, use function code 3.
| Register |
Description |
Type |
Range/Equation |
| 0 |
Sample Interval |
0: below 1 second
>=1: sample interval in second |
0 - 65535 seconds |
| 1 |
Device Operating Mode |
0: logging stopped
1: logger is logging data |
|
| X0 |
CHX-1 Type |
0: Range#0 (0 to 20 VDC)
1: Range#1 (0 to 5 VDC)
2: Range#2 (-5 to +5 VDC) |
|
| X1 |
CHX-1 Enabled |
0:disabled
1:enabled |
If a channel is disabled, the reading is unknown |
| X2 |
CHX-1 Equation |
0: Range#0 Voltage |
Range: 0 to 20 VDC
Equation
O = 20 * I / 65535 |
| 1: Range#1 Voltage |
Range: 0 to 5 VDC
Equation:
O = 5 * I / 65535 |
| 2: Range#2 Voltage |
Range: -5 to +5 VDC
Equation:
O = 10 * I / 65535 – 5 |
| 3: Linear |
O = (LRH – LRL) * I / 65535 + LRL
Where:
LRH is Linear Range high value
LRL is Linear Range low value
You can get those values from SiteView |
Where X = 1,2,3,4,5,6,7,8
O = Output, I = Input Register Value
Example:
To read CH3's equation, a Modbus master device sends in the following command:
| Data(HEX) |
Description |
Note |
| 0001 |
Transaction identifier |
Fixed 2-byte value |
| 0000 |
Protocol identifier |
Fixed 2-byte value |
| 0006 |
Length(6 bytes are followed) |
2-byte value |
| 01 |
The device address |
1-byte value, don't care |
| 03 |
Function Code (read Holding Register) |
1-byte value |
| 002A |
First register's address (42 is 2A in HEX) |
2-byte value |
| 0001 |
The number of required registers (read 1 registers 002A) |
2-byte value |
Note:
- Modbus feature was added to firmware version 2.05 or above.To upgrade a data logger's firmware please refer to this link: How can I upgrade logger firmware?
- The age of an Input Register data is based the data logger's sample interval.If the logger has stopped logging or the logger's sampling interval is slower than five seconds, a request of Input Register data will initiate the sampling process and the new data will be available upon the next request.
