PLC control applications - in the fire fan inspection equipment Industrial control -

Fire fan is an important part of all kinds of fire extinguishing system wind, fire fan sort is more, the general fire control system including the smoke exhaust fan fan, positive pressure blower fan, smoke fire prevention, fire control valve, an important part of the air supply valve and so on, the stand or fall of its electrical and mechanical performance status, direct relationship or decide to fire fighting and rescue, escape, rescue success. Fire to the working characteristics of exhaust equipment is commonly: daily rarely used, equipment idle for a long time, some even directly without power, fan suffered serious corrosion and aging equipment, lack of equipment lubrication, lubrication dry or improper lubrication, such as bearing damage causes the fan can not run; Better situation at ordinary times is often the result of artificial patrolling maintenance negligence caused by corrosion, rust, fan card dead, lubrication pipeline of pipeline aging, fan not free or breaches run leakage or fan control circuit aging, damage, once the fire key when cannot play their role, caused huge losses of lives and property. Recent years, many major fire accident casualties direct reason is that the soot cannot promptly choked to death outside make people breathing, smoke is not outside in time and send fire ventilation equipment is one of the most reason why critical moment will not operate properly.

fire fan is checking device of automatic management of fire control fan equipment daily maintenance inspections, to avoid the fire sent exhaust critical moment can't normal operation, the maximum help reducing the loss of life and property.

given the importance of the fire fighting equipment, stable and reliable, and the height of the control system must be in by many class brand PLC controller on the market for performance comparison, the experimental trial, finally choose the sea for the C series PLC. This series PLC is stable and reliable in performance, simple and easy to use; Single IO points is moderate, rich programming instructions, computing speed is fast. Quick and convenient communication instruction. Combining with the sea for touch screen, can easily realize the man-machine interaction, and can be connected through the MODBUS communication WINCC and kingview, the MCGS, force control upper unit configuration software.

this design fire inspection devices use C32S0R fan PLC, a total of 16 di/do 16 points, up to as many as 12 sets of fire inspection of the fan control. According to user needs can choose fan stations set to cruise control, convenient inspection cycle, inspection time, single parameters can be set to modify real-time inspection time. This system real time polling check fan valve switch state of the system, record the history fan operating data, including time, number of run time start times, start-up success rate; Mandatory running time, automatic running time, fault type, fault time, start-up success rate; Duct differential pressure switch; Fire parameters such as frequency, time of real-time operation state parameters of the fan performance, provide regular fan performance status report.

this design use the sea for PLC convenient communication control instruction, turn the MODBUS TCP/IP with customers via the Internet remote, fire control, equipment maintenance center for information exchange, timely warning and supervision of maintenance personnel for maintenance. Remote clients, fire control, equipment maintenance center limited can be directly or via the Internet ( According to different authorization) Group control to maintain the scene fan equipment, equipment maintenance center can remote update self-checking upgrade control system.

control system part adopts simple practical ladder diagram programming instructions, using the main program call subroutine of modular programming ideas, the logic is clear, easy to transplant program and maintenance of the project. For debugging and modification of the various parameters for man-machine interaction, which has greatly users and debugging personnel, reduce the equipment debugging maintenance cost. Section directive figure screenshots are as follows:

figure 1 main program call instruction

figure 2 inspection control part instruction

figure 3 touch screen screenshots

this design the cabinet put oneself in another's pictures are as follows:

figure 4 local contained in the figure 1

local figure 2 in figure 5 cabinet

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