•
record information about the module installation (serial number, position, picture of installation...) to the
operational documentation under internal rules.
When locating installation site, selecting antenna type and antenna position it is necessary to take into account con-
ditions for radio signal propagation in the area of installation. The conditions is possible either estimate empirically
on the base of previous experience, or accomplish a measurement of the signal strength by the signal analyzer.
4.7
Module replacement
When there is necessary to replace the module due to the module failure follow this procedure:
•
switch off the power supply and disconnect the power cable wires from the module;
•
disconnect the signal cable and the antenna cable;
•
release the module from DIN-rail by pulling down of the black plastic lock on the bottom side of the module
down (outward of the module) and remove the module from the rail;
•
attach the new module at the place of the original module and proceed further according to the procedure
mentioned in the paragraph
. Especially pay attention to the correct connection of the power cable;
•
after switching power on perform the diagnostics and set-up parameters;
•
label the original module as
”
defective” and fill in the appropriate documentation prescribed by internal rules
for this case.
4.8
The module dismantling
When dismantling module turn the power supply off and disconnect the power supply cables from the module.
Disconnect the signal cable and the antenna cable from the module. Release the module from DIN-rail by pulling
down of the black plastic lock on the bottom side of the module (outward of the module). If there is no further
use for the antenna, remove the antenna cable and the antenna. If there is no further use for the power supply,
remove the power supply and the power cable. If the power supply is used for other purposes, secure power cables
against short circuit (by insulation of live ends of wires or by removal of useless power branches) and connect
the power supply again. After dismantling label the module properly as
”
dismounted” and fill in the appropriate
documentation prescribed by internal rules for this case.
4.9
Functional check of the module
After putting the module into operation (or after each repair and replacing of the module) it is recommended to
check module basic functionality as follows:
•
check broadcasting functionality by RFAN 3.x analyzer in ”Packets” or ”Radar” mode (according to the
analyzer documentation) with using of
”
test broadcasting” function described in the paragraph
”
Setting
of test broadcasting”;
•
check receiving of data from all other WACO RF modules of the virtual bus, that communicate through the
module. This check can be performed indirectly, by inspection of table of readings collected by bus control
unit (
”
Master”), or by inspection of gathered data in the remote reading application. If all readings are
available and up-to date, the module is apparently functional;
•
when in doubt, the presence and quality of RF signal from particular module can be tested by RFAN 3.x
analyzer in ”Packets” or ”Radar” mode (according to the analyzer documentation);
•
perform overall check of transmitter and receiver functioning by testing of remote configuration via radio with
using of RFAN 3.x analyzer (i.e. reading of any module’s parameter by ”GET” command as described in
chapter
”
Configuration of the module via radio”);
•
complex end-to-end check of the WM868-MS-LP-H module functionality (including correctness of setting of
the central database) can be performed by trial reading of data from all remote segments of the virtual bus
and inspection of gathered data.
4.10
Operation of the WM868-MS-LP-H module
The WM868-MS-LP-H module performs broadcasting and receiving of radio messages and communication through
the M-Bus bus fully automatically. When the RF-network is overloaded by heavy radio traffic, temporary loss of
messages or short-time breakdowns of connection with some modules can occur due to signal collisions.
WM868-MS-LP-H
25
