| 摘要 |
<p>A telemetry system 1 monitors parameters of a plant 2 having a monitor centre 3 which outputs monitor signals on monitor lines 4 to a GSM outstation 10. In the event of a reportable condition arising, or at a predetermined time, a controller 102 sends a control signal to a text generator 112, which generates a respective text message. This is transmitted as an SMS text message via a transmitter-receiver unit 113 and through a GSM modem 5, to be received on a GSM telephone 20, where the SMS text message appears on the telephone display 202. In addition to waiting to receive messages generated by the GSM outstation 10, a user can dial into the GSM outstation 10 at any time, to obtain a status report of any desired parameter or send an instruction to cause desired operation of an item of plant equipment. The controller 102 is preferably a simple controller, without the full functionality of a PC. Thus, a maintenance engineer in the field can receive reports from plants such as 2 in a simple and economical manner when at a remote location, without the need for a PC or more substantial computer, either where the engineer is located or at the GSM outstation 10.</p> |
