Honeywell EK280 Applications Manual page 113

EK280
− Now disconnect the power to EM260.
− Disconnect the parameterization cable from EM260.
− On the modem adapter board, push-fit the jumper "Mode" in the
position "operation" (right position,  picture).
− Make sure that the EM260 is connected in accordance to the
EK280 with  chapter 7.3.1.
− Make sure that a SIM card is inserted into the CSM modem.
− Make sure that a GSM antenna is connected to the modem.
− Close housing of EM260.
− Switch on the power to the EM260.
− Approx. 1 minute after switching on, the GSM modem ought to have logged on in the GSM network
and should be able to communicate which is indicated by the flashing yellow LED "online" on the
EM260 housing cover.
7.3.4.3 Checking GSM field strength
Before starting a data transfer via the modem, you must ensure that there is adequate reception field
strength.
a) Opening the test time window on the device
i
The test time window only needs to be open if none of the time windows 5 to 6 is currently open.
− Move the cursor to the "Serv." tab in the EK280's display, then to
Interfaces > Terminal interface. > CWTst
− Press the ENTER key in order to enter the length of the test time window in minutes. ⇒ "0" flashes.
− Move the cursor with the arrow keys  or  to the digits and change these with the arrow keys  or
 to 10, for example.
− After the desired digits have been changed, press the ENTER key in order to confirm the input. It is
possible to abort the entry by pressing the ESC key.
b) Display GSM field strength
− Move the cursor to the "Serv." ta.b in the EK280's display, then to
GSM & GPRS >
− With the cursor over GSM.L, please press the EK280 ENTER key and wait for approximately
30 seconds.
The percentage field strength is now displayed under GSM.L.
−
i
With a field strength below 50% data transfer issues may be encountered. You can remedy this
in the majority of cases with an external antenna, mounted somewhere suitable.
Application Manual
GSM.L.
Interfaces > Terminal interface >
111