Telemetry Module MT-102 User's Manual - BlueNote Communications
Telemetry Module MT-102 User's Manual - BlueNote Communications
Telemetry Module MT-102 User's Manual - BlueNote Communications
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Comments - This parameter helps set an exclusive transmission channel to a<br />
remote device for a period of time. This enables establishing a<br />
system consisting of several devices with functionality similar to<br />
point-to-point.<br />
When a channel is established, the module ignores packets<br />
received from other devices and all data received at PORT 2 are<br />
sent to the module with which the channel is established.<br />
Transmission costs are thus reduced significantly. Packets are sent<br />
to all recipients only at first transmission.<br />
The function is activated by setting the value to other than zero<br />
thus defining the time channel is reserved. Time count starts from<br />
receiving first GPRS packet.<br />
Consecutive packets from same source prolong reservation time<br />
while sent packets do not.<br />
Setting this variable to 0 switches reservation off and module<br />
operates in standard way sending and receiving packets to all<br />
defined recipients.<br />
The function of channel reservation is independent on module<br />
access frames. Reception of such frame does not reserve the<br />
channel. Access to module from other master is possible when<br />
channel is reserved.<br />
8.2.5.6. GazModem mode<br />
CAUTION!<br />
Option discontinued from v 1.43 of firmware for module <strong>MT</strong>-<strong>102</strong>.<br />
The description is solely for legacy support.<br />
<strong>MT</strong>-<strong>102</strong> <strong>Module</strong> operating in GazModem mode enables communication with gas counters<br />
operating on GazModem transmission protocol. Data received at PORT2 are placed in<br />
respective registers of <strong>MT</strong>-<strong>102</strong> module's memory map.<br />
8.2.5.6.1. Read interval<br />
Function - Defines (in seconds) an interval between readings from peripheral<br />
device operating on GazModem protocol in order to update<br />
measurement data.<br />
Data type - number<br />
Range - 0…65535 [s]<br />
Default value - 180 [s]<br />
Comments - value 0 (zero) forces max. possible frequency of updating. It<br />
depends on speed of PORT2 along with size and number of defined<br />
mapped spaces.<br />
8.2.5.6.2. Number of retries<br />
Function - defines number of attempts to transmit data via PORT2 in case of<br />
unconfirmed (within time defined by transmission Timeout<br />
parameter) reception.<br />
Data type - number<br />
Range - 0…7<br />
Default value - 2<br />
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