Scada installations in factories

If the project encompasses large area to be surveyed and human surveillance in not possible in such case, then one needs long distance SACDA radio networks to be employed for sending the data collected from remote sensors to central unit.

When area under surveillance is hundreds of kilometres such as in case of petroleum pipeline, the only feasible solution is long distance Scada GSM. Most important requisite for long range Scada GSMs is ability to transmit the data to long distance.

For such purposes, repeaters are used as line of sight is limited to 5 miles. Repeaters are radio transmitters which act as boosters for signals as signals tend to get weak after travelling certain amount of distance. Thus repeaters boost the attenuated signals and again transmit them to next repeater/ central system.

The brain of SCADA system lies in Remote Terminal Units (also termed as RTU). Remote terminal units are composed of logic converters which can be programmed easily. Remote terminal unit is generally set as per the requirements, but mostly RTU requires human intervention in case of emergency or any extreme conditions. But in general, most of SCADA system behaves as closed loop systems thus require minimal human intervention.

One of key features about SCADA systems is their ability of real time monitoring of entire system. This is accomplished by data acquisitions from sensors viz meter reading, status of sensor etc that are sent to central system at regular time period depending upon the system. Along with data acquisition another function performed by SCADA system is to display the data collected from various sensors in human readable format so that any time human can intervene as the need arises.

High powered scada communications

Scada in the water industry

SCADA, acronym for Supervisory Control and Data Acquisition have been proved as one of revolutionary technology which has all together changed face of automated tasks.

Due to integration of SCADA systems with automated tasks, these have become more reliable. Though being a supervisory system, SCADA systems are powerful systems which control the flow of automated tasks on its own and without any need for human to intervene. Due to these reasons, SCADA is becoming more and more popular.

As the need for human intervention is almost zero and SCADA system incites predefined actions when the state of system changes or when value of any parameter changes beyond permissible levels, these have found wide applications now.