S7 STL watchdog?
- Thread starter komatic
- Start date
L D[AR2P#0.0]
Lifetime Supporting Member
Do you mean that a discrete input will normally be changing state (say once per second) and that you wish to detect when the input stops changing state ?
Why does it have to be in STL ?
Which S7 range, 200 or 300/400 ?
Why does it have to be in STL ?
Which S7 range, 200 or 300/400 ?
I could write it in less than a minute.
But what you need to is to try and solve this trivial problem yourself.
Make an effort. If you cannot get it to work, then post your work and we shall try to help you then.
But what you need to is to try and solve this trivial problem yourself.
Make an effort. If you cannot get it to work, then post your work and we shall try to help you then.
PeterW
Member
The timer needs an off to on transition to work, after you reset it it won't restart until the timer goes off to on. The SET is always on.
You would normally need to look at both on and off as well.
try:
a I 0.0
l s5t#10s
sd t1
an I 0.0
l s5t#10s
sd t2
a t 1
o t 2
= #error
You would normally need to look at both on and off as well.
try:
a I 0.0
l s5t#10s
sd t1
an I 0.0
l s5t#10s
sd t2
a t 1
o t 2
= #error
L D[AR2P#0.0]
Lifetime Supporting Member
Yes, but you need something to detect the edge changing e.g.
Similar Topics
i am new to simatic manager and i am trying to figure what this part do in the code :
A I 5.6
= DB50.DBX 4.6...
Hello everyone, can anyone help me with covert the STL code to ladder.
Iam using plc s71200.
A %DB1.DBX33.7 // angel of vaccum...
Hello nice to meet you, im new in here,
I'm currently trying to convert code written in STL for a S7-400 to SCL for an S7-1500, because when i run...
First off thank you in advance. Second I am very new to STL.
I am trying to build a counter that has one count up and 23 count down options. Am...
Hi Siemens Experts,
I am hoping someone can shed some light on my issue.
I have uploaded the code from a S7-300 (317-2PN/DP) using Step 7...