Description of technological object
The system of monitoring of cement mill #8 and control
of flyash silo and cement silos #21, 23, 25 at Mykolaiv cement plant
is performed on the basis of technical requirements, that was elaborated
as a result of preliminary inspection of technological process of
transportation of flyash to silo, transportation of flyash from
silo and its proportioning to cement, transportation of cement to
medium block of silos.
Destination of the ACS
The system is intended for monitoring of state of
cement mill #8, SCHENCK batching system,
remote control of fuller and filters of flyash silo and bunker,
remote control of filters of cement silos #21, 23, 25, level control
in cement silos and flyash bunker.
Structure and functions of the ACS
The systems consists of two independent segments:
subsystem of monitoring
of cement mill #8 and control of flyash silo (see
figure 1), which includes control desk with operator workstation
and S7-300 controller with
corresponding software as well as ET200M
distributed periphery module;
Figure 1 - Structure chart of subsystem
of monitoring of cement mill #8 and control of flyash silo
subsystem of control
of cement silos #21, 23, 25 (see figure 2), which
required the reconfiguration of the software of existing
operator workstation PC 670
(WinCC v5.1), operator panel
MP 370 (ProTool
v6.2), controller S7-400
(Step7 v5.1).
Figure 2 - Structure chart of subsystem
of control of cement silos #21, 23, 25
The system provides two modes of control of fuller
and filter drives:
- remote control - by operator workstation;
- local control - from control buttons suit
job requirements.
Starting the drives from local control buttons is
permitted only in the presence of enable signal from operator workstation.
Stopping the drives is possible in both modes.
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