S5 timers with compares?

russg · Mar 3, 2015

Hi,

I'm more used to using S7 and been given an S5 project. Does anyone know how a compare is used when say T21 is input into one of the inputs?

The pic is from the program. I'm assuming it means when T21 gets to 3 seconds it will output A5.1?

Can anyone confirm this please?

gclshortt · Mar 3, 2015

Yes you are correct in reading this program.

file:///C:/Users/Garry/Downloads/Step_5_v_7.2_manual.pdf

The selected comparator operation (! =, ><, >=, >, <=, <) is entered in the
left-hand side of the long box and the format of the operands to the right,
as follows:
F = fixed point number (16 bits)
D = double word (32 bits)
G = floating point number (32 bits)

Regards,
Garry
http://www.accautomation.ca

russg · Mar 3, 2015

Thanks for the info Garry. I would have thought entering T21 would just give you a high or low signal ie 1 bit? I would have thought using the actual timer value would mean having to use the BI or BCD out functions of a timer?

KalleOlsen · Mar 3, 2015

In STL it's like this:

LC T 21; Loading the timer value BCD coded

L T 21; Loading the timer value as integer.

I mean to remember that the timers counts downwards to 0.

Edit: Ad KF+3; the size is dependant of the time base of the value loaded when the timer was started. So it can be 3*10ms, ... to 3*10s.

Kalle

L D[AR2P#0.0] · Mar 3, 2015

From the s7 help:

wimpiesplc · Mar 4, 2015

gclshortt said:
Yes you are correct in reading this program.

file:///C:/Users/Garry/Downloads/Step_5_v_7.2_manual.pdf

He's not correct; !=F means "not equal to" so at the moment the timer value is 3, the output is off. also the timer probably continues after that depending on it's setting.

second, what's your purpose posting links to your local drive? lol.

L D[AR2P#0.0] · Mar 5, 2015

If in doubt, RTM:

curlyandshemp · Mar 5, 2015

wimpiesplc said:
He's not correct; !=F means "not equal to" so at the moment the timer value is 3, the output is off. also the timer probably continues after that depending on it's setting.

second, what's your purpose posting links to your local drive? lol.

from the manual
:

curlyandshemp · Mar 5, 2015

L D[AR2 said:
If in doubt, RTM:

always thought it was RTFM

wimpiesplc · Mar 5, 2015

heh shame on me, I was too quick... and confusing with C semantics

S5 timers with compares?

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