help with step 7 s300
- Thread starter gh_ounie
- Start date
PeterW
Member
UC unconditional call?
such as
UC FC50
is unconditionally call FC50 without parameters, therefore, the FC needs to be programmed without any IN, OUT etc parameters.
such as
UC FC50
is unconditionally call FC50 without parameters, therefore, the FC needs to be programmed without any IN, OUT etc parameters.
If what you want to do is to activate an FC if a counter has reached a set value, then here is an example:
Paste this in STL, and switch to LAD:
Network 1:
A M 0.0
CU C 0
BLD 101
A M 0.1
L C#55
S C 0
A M 0.2
R C 0
NOP 0
NOP 0
NOP 0
Network 2:
A C 0
CC FC 1
FC1 is called when C0 has reached the setvalue of "55".
M0.0 counts C0 up.
M0.1 accepts the setpoint.
M0.2 resets C0
Paste this in STL, and switch to LAD:
Network 1:
A M 0.0
CU C 0
BLD 101
A M 0.1
L C#55
S C 0
A M 0.2
R C 0
NOP 0
NOP 0
NOP 0
Network 2:
A C 0
CC FC 1
FC1 is called when C0 has reached the setvalue of "55".
M0.0 counts C0 up.
M0.1 accepts the setpoint.
M0.2 resets C0
JesperMP said:
That will not work.
M0.0 counts up, this is correct
M0.2 resets the counter, this is correct
M0.1 Presets the counter, it makes the value of C0 = 55
This might be better
Code:
Network 1:
A M 0.0
CU C 0
BLD 101
NOP 0
NOP 0
A M 0.2
R C 0
NOP 0
NOP 0
NOP 0
Network 2:
L MW 20 // Contains the value at which the counter should call the FC
L C 0 // Value of the counter
<=I // Compares if the counted value is greater then the setpoint MW 20
CC FC 1 // If counter is equal or greater then setpoint, call FC 1The way Jesper suggested, it would call FC 1 whenever the counter value is greater then zero.
If in doubt, just press F1 in LAD/STL/FBD-editor and search for the componants.
The second network won't convert to LAD. Sorry for this, but I don't like working in LAD that much and don't know how to do it in LAD. Tried the 'CMP <=I block' w/o Type Check of Adresses, but it still gives errors.
EDIT: several cosmetic changes
Last edited:
I never use the S5 counters so it may excuse my ignorance.
After looking into it a bit more, I have to sat that the purpose of an S5 UP counter baffles me ! As soon as it leaves zero, the output is set, no matter what the setpoint value is. What can one achieve by that ??
The S5 DOWN counter makes more sense, when you use the "S" input the setpoint gets set, and each activatiof of the "CD" will count down towards zero.
As long as the count value is not zero, the output will be TRUE.
When zero is reached, the output is set to FALSE.
I have modified my code so that it will work as I intended originally:
Network 1:
A M 0.0
CD C 0
BLD 101
A M 0.1
L C#55
S C 0
A M 0.2
R C 0
NOP 0
NOP 0
NOP 0
Network 2:
AN C 0
CC FC 1
After looking into it a bit more, I have to sat that the purpose of an S5 UP counter baffles me ! As soon as it leaves zero, the output is set, no matter what the setpoint value is. What can one achieve by that ??
The S5 DOWN counter makes more sense, when you use the "S" input the setpoint gets set, and each activatiof of the "CD" will count down towards zero.
As long as the count value is not zero, the output will be TRUE.
When zero is reached, the output is set to FALSE.
I have modified my code so that it will work as I intended originally:
Network 1:
A M 0.0
CD C 0
BLD 101
A M 0.1
L C#55
S C 0
A M 0.2
R C 0
NOP 0
NOP 0
NOP 0
Network 2:
AN C 0
CC FC 1
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