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11.2. Application examples
This chapter shows basic configurations of systems employing MT-30x modules.
11.2.1. Communication with single module using mobile phone
This is the simplest possible monitoring system based on transmission of SMS messages
by MT modules in case of event defined during module configuration. In this mode, the
module sends text SMS with static or dynamic content holding information on input/output
states or content of module's internal registers. This mode may be employed in systems
where continuous monitoring is not imperative but alert when defined event occurs or an
answer for enquiry is wanted. SMS syntax is described in appendices.
11.2.2. Using internal resources
This configuration requires connecting MT-30x modules with a supervisory system. As a
central unit router/MT-202/GPRS modem can be used, where one acts as a gateway to a
transmission system (PLC, SCADA) set in Modbus Master mode. In this case, the device
connected to central unit plays the role of a master unit, sending inquiries about
appropriate resources of remote MT-30x module. The module connected to a master gives
access to its internal resources thus widening the central system.
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