DC303
– Operation and Maintenance, Instruction Manual
3.16
M -
Bucket Motor
P -
Comport Piston
C -
Weight Circuit
Process:
The system requires the following conditions to startup:
The phosphatic stone level (LSL non activated);
Oil Pressure (PSL on);
Conveyor 02 active (M3 on);
Bucket in initial position (C4 on);
After the initial conditions, we note:
By activating the power switch, the comport opens, and the bucket starts to get
loaded;
After reaching the desired weight, the comport closes. After 5 seconds, the bucket
rotates 180
o
and unload
the product into the conveyor 02.
Note:
This new position will be detected by C2 and after 5 seconds, the bucket will have
to return to initial position, which will be detected by C4.
After the bucket returns to the initial position, a new weight cycle begins.
Comment:
The operation sequence must be stopped if any requirement is not satisfied.
The silo comort is activated by a hydraulic piston.
Using the Flexible Function Block we have the following definitions:
LSL will be connected to the hardware input 01 (I01);
LSH will be connected to the hardware input 02 (I02);
PSL will be connected to the hardware input 03 (I03);
C2 will be connected to the hardware input 04 (I04);
C4 will be connected to the hardware input 05 (I05);
Power will be connected to the hardware input 06 (I06);
M3 will be connected to the hardware input 07 (I07);
M will be activated by hardware output 01 (O1);
The Comport will be activated by hardware output 02 (O2);
M1 will be activated by hardware output 03 (O3);
We have the following configuration:
TON_PST resource [01] = 5.0s.
LOGIC_01 A01=!I01&I03&I07&I05;
LOGIC_02 A02=I06&RS01(I02,I01);
LOGIC_03 O3=A02&I03;
LOGIC_04 A03=I03&I07;
LOGIC_05 O2=I06&A03&!I04;
LOGIC_06 O1=TON01(I04)&!I05&A03;
3)
Using Fault-State values:
Lets suppose we have the following condition:
A01 receives the logic between the status for discrete inputs as follows:
A01=IN1S&IN2S;
when the status is bad for one of these inputs, then, A01=false(0),
otherwise, A01=true (1);
FS1 is the fault-state value for O1;
A02 is the bit containing the logic for O1;
We have the following table between the FS1, A01 and A02:
FS1
A01
A02
O1
0
0
0
0
0
0
1
0
0
1
0
0
