Bedienungsanleitung

Siemens Smart Infrastructure A6V12318603_----_a 2021-01-28 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 parame-
terization. Certain button functions can also be blocked.
Service loop „LOOP 4“
Head of the loop
…
…
Type “MI / G4” in slot “module 1”
M-Bus Primary address for slot “module 1”
6. Parameterization
6.1 Modbus addressing
The communication module can be addressed in the range 1 –
247. For modules with version v1 – v4, the Modbus address
corresponds to the meter’s M-Bus primary address for module
slot 1 (AP1). Please set the address directly at the meter prior
to any further parameterization.
Note: For modules with firmware version v5 and
higher, setting the Modbus address must be done
using the WZU-485ConfigurationTool (see chapter
6.2).
6.2 Parameter setting via USB interface
Requirements:
• Micro-USB (type B) to USB cable
• Computer with Windows OS
• Software “WZU-485 Configuration Tool”; can be down-
loaded from www.landisgyr.eu
Attention: The module’s power supply must be
switched off before the module is connected to a PC
via USB cable.
Note: The micro-USB interface is used for setting the
communication protocol, communication speed, parity
and Modbus address.
Proceed as follows to parameterise the module:
• Disconnect the screw connector.
• Connect the module to a PC via micro-USB to USB cable
• Start the software “WZU-485 Configuration Tool”.
• Press the “Read” button [1].
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].
• Close the software.
• Disconnect the USB cable from the module.
• Insert the screw connector.
• Close the meter’s cover and affix the seals.
Note: For battery-powered meters: Operating the
communication module with a read-out interval of less
than 10 minutes requires a D-cell battery for 6 years.
7. Technical data
General information
Communication protocol
Modbus RTU on RS485
Modbus address range
1 – 247
Transmission rate
2400 / 4800 / 9600 / 19200 bps
Communication address
M-Bus primary address of T550
(Loop 4: )
Data refreshing
Parity
Number of stop-bits
Stand-by mode: 60 min
In operation: After every data request, up to 10s
Even / odd / none
1
Default settings
Transmission rate
9600 bps
Modbus Parity
even
Communication address
0 (meter default; must be changed)
RS485 information
HW network connection
RS485: A+, B-, GND
communication signal inputs (A, B) are protected
against short-term (pulse) overload
Bus termination
use external resistor (120 Ohm)
Power supply
Alternating current
permissible range AC 16...28 V
Direct current
permissible range DC 10...32 V
Consumption
<50mA (typically <20 mA / 24 V)
Recommended fuse
fuse T 100 mA
Galvanic Isolation
From the meter
yes
From the RS485 network
no
[1]
[2]
[3]