Bedienungsanleitung

ManualsBrandsSiemens ManualsMetering devicesHeat meter UH50..

Operating instructions

Modbus module WZU-485E-MOD

A6V12318603_----_a

2021-01-28

Original language

Siemens Smart Infrastructure A6V12318603_----_a 2021-01-28 1

1. Safety Information

Comply with ESD protection measures.

Avoid short-circuits on the PCB.

When connecting, turn off the mains supply.

Route connecting cables only through the bush

sleeves of the meter.

Do not cut the bush sleeves shorter than necessary

because this may lower the degree of protection.

2. Description of function

WZU-485E-MOD is an add-on communication module for the

following types of meters: UH50.. (firmware 5.15 and higher)

and UC50.. .

The module is intended and preconfigured for data transmis-

sion using the Modbus RTU protocol on RS485.

Note: An external power pack must power the module

(not included in the module’s scope of delivery).

3. Items delivered

1. Communication module WZU-485E-MOD

2. Screw connector for RS485 interface and power supply

4. Installation and assembly

Up to 2 communication modules can be installed.

Number

Description

Service button (under the housing cover)

Slot “module 1”

Slot “module 2”

Bushing for power cable

Cable grommets

Note: WZU-485E-MOD may only be combined with

an M-Bus module in slot “module 2”. Only one of them

may be operated in fast read-out mode with an up-

date interval shorter than 15 min.

Installing the communication module

The communication modules are connected via a 6-pole reac-

tion-free connector so that installation or replacement is possi-

ble at any time.

To install a communication module proceed as follows:

• Press the 4 side lugs of the housing cover inwards and

remove the cover.

• Put the communication module into the correct position.

Note: The module WZU-485E-MOD may only be

fitted at slot “module 1”.

• Place the communication module carefully in both guide

slots and push it in.

• Wait for the module indication on the meter display (Loop 4:

“Modul1 MI / G4”).

• To connect the power supply and the communication cable

of WZU-485E-MOD, open 2 sleeves matching the cross

section of the respective cables.

Note: Open the cable sleeves in such a way that they

enclose the cable tightly.

• Guide cables through the bush sleeves from the outside.

• Connect the the power supply to terminals 24V and GND,

and the communication cable to terminals A+ and B-.

Note: For the connection to the screw terminal, a slot

screwdriver with 2.5 mm tip is needed.

Attention: Do not connect the the power supply to

terminals A+ and B-. This may cause permanent

damage to the module.

• Insert the screw connector into its counterpart on the com-

munication module.

• Secure the cables with the metal strain relief.

Summary of content (8 pages)

PAGE 1
s A6V12318603_----_a 2021-01-28 en Operating instructions 1. Modbus module WZU-485E-MOD Original language Safety Information Comply with ESD protection measures. Avoid short-circuits on the PCB. When connecting, turn off the mains supply. Route connecting cables only through the bush sleeves of the meter. Do not cut the bush sleeves shorter than necessary because this may lower the degree of protection. 2.
PAGE 2
Note: The cables used should be as short as possible and their length must not exceed 10 m. 5. LCD display Note: Both display range and data displayed can differ from this description depending on the meter parameterization. Certain button functions can also be blocked. Service loop „LOOP 4“ The software reads and displays the current parameter settings of the module. • Make the necessary settings. • Press the “Write” button [2]. • After successful parameterisation, “Status OK” is displayed [3].
PAGE 3
8. Modbus description Data format of a complete meter readout Register Number Data Address Value Data type Name Value Description 0x40002 1 Tf Temperature hot side 16bit INT 0.01 °C 0x40003 2 Tr Temperature cold side 16bit INT 0.01 °C 0x40004 3 dT Temperature difference 16bit INT 0.01 K 0x40005 4 Q Current flow rate 32bit INT 0.001 m³/h 0x40007 6 P Current power 32bit INT 0.
PAGE 4
Info Code 16Bit UINT X X X X X X 9 8 7 6 5 4 3 2 1 0 Meter Error - - - - - - F9 F8 F7 F6 F5 F4 F3 F2 F1 F0 0x0106 0 0 0 0 0 0 0 1 0 0 0 0 0 1 1 0 Meter Error - - - - - - F9 F8 F7 F6 F5 F4 F3 F2 F1 F0 Example Info Code Table 2: Info Code (data address 12) Header 16Bit UINT X X X X X X X X 7 6 5 4 3 2 1 format format energy* volume* 10^(XX) MJ 10^(XX) l 10^(XX) kWh *XX (binary) needs to be converted to decimal.
PAGE 5
s A6V12318603_----_a 2021-01-28 de Bedienungsanleitung 1. Modbus Modul WZU-485E-MOD 4. Sicherheitshinweise Übersetzung Einbau und Montage Bis zu zwei Kommunikationsmodule können eingebaut werden. ESD Schutzmaßnahmen beachten. Kurzschlüsse auf der Leiterplatte vermeiden. Bei Anschlussarbeiten die Netzspannung ausschalten. Anschlussleitungen nur durch die Tüllen des Zählers führen. Tüllen nicht unnötig kürzen, ansonsten ist die Schutzart gefährdet. 2.
PAGE 6
• • Achtung: Schließen Sie die Spannungsversorgung nicht an den Klemmen A+ und B- an. Sonst kann das Modul dauerhaft beschädigt werden. Stecken Sie den Schraubstecker in sein Gegenstück auf dem Kommunikationsmodul. Zur Zugentlastung fixieren Sie die Kabel mit den Schellen. [1] Hinweis: Die verwendeten Kabel sollen so kurz wie möglich sein. Die max. Länge beträgt 10 m. [2] 5.
PAGE 7
8. Modbus Beschreibung Datenrahmen einer komletten Zählerauslesung Register Nummer Datenadresse Wert Wert Beschreibung Datentyp Format 0x40002 1 Tf Temperatur warme Seite 16bit INT 0.01 °C 0x40003 2 Tr Temperatur kalte Seite 16bit INT 0.01 °C 0x40004 3 dT Temperaturdifferenz 16bit INT 0.01 K 0x40005 4 Q Aktueller Durchfluss 32bit INT 0.001 m³/h 0x40007 6 P Aktuelle Leistung 32bit INT 0.
PAGE 8
Info Code 16Bit UINT X X X X X X 9 8 7 6 5 4 3 2 1 0 Zählerfehler - - - - - - F9 F8 F7 F6 F5 F4 F3 F2 F1 F0 Beispiel Info Code 0x0106 0 0 0 0 0 0 0 1 0 0 0 0 0 1 1 0 Zählerfehler - - - - - - F9 F8 F7 F6 F5 F4 F3 F2 F1 F0 2 1 Tabelle 2: Info Code (Datenadresse 12) Header 16Bit UINT X X X X X X X X 7 6 5 4 3 0 Einheit Energie 0=MJ 1=kWh *XX (binär) muss in einen Dezimalwert umgerechnet werden.