27 GPRS support Page 126 of 142
MCS301 meter - product Manual 1.25 MetCom Solutions GmbH
27.2.1 Triggering Scheduler
3 different schedules can be used for triggering the making GPRS connection and pushing message
to the HES. They are as follows:
• Push action scheduler – Interval_1
• Push action scheduler – Interval_2
• Push action scheduler – Interval_3
The "Push action scheduler – Interval_1" is intended to trigger making connection with CS (Central
System) at the specific time or regular fashion to activate the PDP context and establish new GPRS
session. This will be done to establish connection with Central System at some specific time points.
27.2.2 Triggering by Alarm
If an Alarm happens, the GPRS connection can be established and the Alarm Descriptor will be sent
to CS (Central System). The COSEM objects "Alarm Monitor 1” (21, 0-0:16.1.0.255) and “Alarm
Monitor 2” (21, 0-0:16.1.1.255) are used to handle triggering by Alarm.
If an Alarm happens in device, these objects call a fourth script in "Push Script Table" object (9,0-
0:10.0.108.255) and the called script invokes the "Push" method of "Push Setup-Alarm" object (40,
0-4:25.9.0.255). The "Push Setup-Alarm" objects send the Alarm Descriptor Central System.
27.2.3 Triggering by GPRS Connection Detection
The Push on GPRS Connection Detection (Connectivity) is triggered each time a new network
connection is established. A new network connection may be caused internally (e.g. reconnection in
mode 101 -always ON mode-, starting a new connection window in mode 102 and 103) or externally
by sending a wake-up signal to the meter in mode 104 –wake-up by trigger- or 103 -SMS.
The SMS (as external triggering) is handled by “Auto Answer” COSEM object (28, 0-0:2.2.0.255).
The listening window is always ac ve in case of external triggering mechanism is used. The device
answers (receives) only (message from) to the calling numbers that are specified in
"list_of_allowed_callers" attribute of mentioned COSEM object.
27.2.4 Push protocol
Two different protocol/formats can be used to push the data to one of the selected targets
• EN62056-21 data format
The data format of this push type is identical to the protocol EN62056-21, Mode C
Example: <STX>96.1.0(1MCS17100000051)<CR><LF>
0.9.1(14:45:59)<CR><LF>
0.2.2(12345678)<CR><LF>
1.8.1(123.34kWh)<CR><LF>
1.8.2(37.57kWh)<CR><LF>
....
2.8.2(101.23kWh)<CR><LF>
!<CR><lf>
<ETX><BCC><CR><LF>
• DLMS/COSEM data format
The data format of the DLMS push type is identical to the COSEM format
Example: <STX>96.1.0(1MCS17100000051)<CR><LF>
…….
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