analoge input

hello group
iam trying to make plc program s7-300 to monitor an analoge input with signal 4-20mA can you help me

To read the analog input you can use FC105.

http://www.plctalk.net/qanda/showthread.php?p=349665&posted=1#post349665

tnks ivo, i found fc105 but i have problem how to write the int value for 4mA and 20mA and the fc 105 input,the scale for my measurement is 0-100

http://www.plctalk.net/qanda/showthread.php?t=44643&highlight=fc+105

post #7

thnx alot ivo,you put my legs at the start so ivo how i can monitor that program from clemens at operation panel (op 277) from siemens and how ican program its soft key to make reset for the alarm under pressure . just give me small program

really best regards for you

OP277: you need to use WinCC Flexible.

'monitor the program': I guess that you want to show some of the variables of your program.

For this you need to

- program the connection to your OP
- define a 'tag' for your variable
- use the 'tag' inside a 'screen'

'reset the alarm':

first of all: explain what you mean with 'alarm under pressure'.

- you can make an 'alarm' with Wincc Flexible inside the OP
or
- you can program your alarm inside the plc

Wich one do you use?

thnx for your fast reply ivo ,,,

for example i have the following data for project:-
water tank filling by pump and drain by full open-close valve and analog level sensor .
SO i need to make program to control and monitor the process with s7-300 plc and wincc flexible like this way:-
show the level changes at the operation panel and the state of the valve (open -close)and monitor the flow (the signal come from flow meter 4-20mA)and show high alarm for setpoint high level
note :- the valve is controlled by 2 set point from the analog level sensor

best regards for your help

On the CD's are some helpfull quickstart-manuals.

Maybe this can give you a headstart:

http://www.fer.hr/_download/repository/Users_Manual_WinCC_flexible_en-US.pdf

thnx very much ivo ,really you activate my mind to start the actual sequence to make full plc program

best regards