Elgas DATCOM, Operating Instructions Manual

Page: 156 / 228

10
Communication with the Device
154
device, which must be set in each device. The address of each device must be set in the device
parameters. The device address can be set either from the device keyboard (section 6.7), or
using the service SW [42], [43].
The device address consists of two parts, in the parameters labeled Network address1 and
Network address2. If more than one device is connected to the communication line, the
addresses must be set so that no collision occurs.
The ELGAS communication protocol uses both parts of the address, the MODBUS
communication protocol uses only Address1.
Setting the range of the communication address (network address) of
the device
Address1 Address2
Communication protocol ELGAS 0 – 65 535 0 – 255
Communication protocol MODBUS
*)
10 - 247 not used
*) communication addresses 1 to 9 are reserved for the internal parts of the device
Table 29 Setting range of device communication addresses
10.1 EN 62056-21 (IEC-1107) Optical Interface
In the front cover of the enclosure there is a port for communication via the optical head. The
optical head is placed to the port and secured with a magnet. An HIE-04 with USB connection to
the PC (or HIE 03 with RS232 interface) can be used as an optical head. When the optical head
is attached, the machine switches from the standby mode into a mode that allows for data
receiving. Depending on the device setting, the device remains in this state either until the
attached optical head is removed from the communication interface or until the set time limit since
the last communication expires (timeout within 1 to 255 seconds) since the last communication
expires. The size of the set timeout can be read and changed using the parameter “Deactivate IR
head after[s]” (in SW TELVES [43] on the Service parameters tab, in SW COMPASS [42] in Pro
settings, menu Parameters-> General-> Other).
10.2 Modules of the Internal Modems
The device contains a build-in antenna of the integrated M2G, M4G modem. If the signal is weak
at the installation site, an external antenna may be used. In this case, however, it is necessary to
order a special HF cable adapter from the manufacturer to connect the external antenna. The HF
cable reducer is installed as described in v Section 7.7.2.
Using the utility SW [43], [42], the M2G modem can be set to one of the following modes:
 GSM modem
 modem GPRS modem
 GSM & SMS modem
 GPRS & SMS modem
Data transfer can be initiated either by the dispatcher station calling the device (PULL) or by the
device calling the dispatcher station (PUSH).
The minimum recommended RSSI value for GPRS communication is -85 dBm (i.e. 45%). Below