WebControl rev 2.2.2, firmware SH 3.2.13
One of my TLL inputs is connected to a switch ( opto ) that detects when a backup sump pump is activated. The code I have works, but I originally had issues with multiple emails being sent.
The switch, on IP1, is normally high (1) indicating the backup pump is OFF. When the float is activated, the pump comes on, and IP1 goes low for the duration of the time it takes for the backup pump to reduce the water level below the float.
Here is the original code. What was happening was that the email was sent more than once while the pump was activated ( IP1 low )
START
SET RAM1 0
LOOP:
TSTEQ IP1 0 # is the pump running ?
GOTO SEND
SET RAM1 0 # reset the flag
GOTO LOOP
END
SEND:
BNZ RAM1 LOOP # if we have sent the email alredy goto loop
SET RAM1 1 # otherwise set flag indicating we are sending email
EMAIL EM1
GOTO LOOP
I think what was happening is that I had some bounce issues with the float switch on IP1, so I added a small delay to the code after setting RAM1 to allow the switch to settle.
START
SET RAM1 0
LOOP:
TSTEQ IP1 0 # is the pump running ?
GOTO SEND
SET RAM1 0 # reset the flag
DELAY 250 # debounce
GOTO LOOP
END
SEND:
BNZ RAM1 LOOP # if we have sent the email alredy goto loop
SET RAM1 1 # otherwise set flag indicating we are sending email
EMAIL EM1
GOTO LOOP
This worked and I only get one email. However, I think this could be done more elegantly using the non-blocking delay on IP1 such as ...
START
SET RAM1 0
LOOP:
TSTEQ IP1[250] 0 # is the pump on more than 250 ms ?
GOTO SEND
SET RAM1 0 # reset the flag
GOTO LOOP
END
SEND:
BNZ RAM1 LOOP # if we have sent the email alredy goto loop
SET RAM1 1 # otherwise set flag indicating we are sending email
EMAIL EM1 # send mail
GOTO LOOP
Two questions....
1 - Assuming this works, is the any known issues with using the non-blocking delay on TTL inputs with SH 3.02.13 firmware ?
2 - How can I comment the code ? When I paste code into the PLC it complains about the # comments, is there any comment symbol ?????
One of my TLL inputs is connected to a switch ( opto ) that detects when a backup sump pump is activated. The code I have works, but I originally had issues with multiple emails being sent.
The switch, on IP1, is normally high (1) indicating the backup pump is OFF. When the float is activated, the pump comes on, and IP1 goes low for the duration of the time it takes for the backup pump to reduce the water level below the float.
Here is the original code. What was happening was that the email was sent more than once while the pump was activated ( IP1 low )
START
SET RAM1 0
LOOP:
TSTEQ IP1 0 # is the pump running ?
GOTO SEND
SET RAM1 0 # reset the flag
GOTO LOOP
END
SEND:
BNZ RAM1 LOOP # if we have sent the email alredy goto loop
SET RAM1 1 # otherwise set flag indicating we are sending email
EMAIL EM1
GOTO LOOP
I think what was happening is that I had some bounce issues with the float switch on IP1, so I added a small delay to the code after setting RAM1 to allow the switch to settle.
START
SET RAM1 0
LOOP:
TSTEQ IP1 0 # is the pump running ?
GOTO SEND
SET RAM1 0 # reset the flag
DELAY 250 # debounce
GOTO LOOP
END
SEND:
BNZ RAM1 LOOP # if we have sent the email alredy goto loop
SET RAM1 1 # otherwise set flag indicating we are sending email
EMAIL EM1
GOTO LOOP
This worked and I only get one email. However, I think this could be done more elegantly using the non-blocking delay on IP1 such as ...
START
SET RAM1 0
LOOP:
TSTEQ IP1[250] 0 # is the pump on more than 250 ms ?
GOTO SEND
SET RAM1 0 # reset the flag
GOTO LOOP
END
SEND:
BNZ RAM1 LOOP # if we have sent the email alredy goto loop
SET RAM1 1 # otherwise set flag indicating we are sending email
EMAIL EM1 # send mail
GOTO LOOP
Two questions....
1 - Assuming this works, is the any known issues with using the non-blocking delay on TTL inputs with SH 3.02.13 firmware ?
2 - How can I comment the code ? When I paste code into the PLC it complains about the # comments, is there any comment symbol ?????
