Internet PLC Forum

Greetings,

Have you some samples of code for trapping runtime errors,

Especially how do you get the displayed error messages on line 1 and 2 of the LCD display

What type of recover we ca do, exept doing a reset and error logging?

Regards

Greetings,

I've created a small ladder rung that run a Dcust function to set the followings commands:

SETPWM 1,500, 1
SETPWM 2,500, 2

On a FMD88-10 r81, it's working well generating a 2Hz pulse.

On a FMD88-10 t78, it' setting the DO7 and DO8 permanent.

Can you explain me that behaviour difference.

regards

I'm trying to use the status(3) function to get the status of the following command

PRINT #4 "<TCPCONNECT 10.10.20.100:514>"

even after a delay the status(3) is still returning 0
but after id i do some PRINT #4
the text of the print is well sended via TCPIP.

Do i missunderstand how the status(3) is working?

Hello Everyone,

I got a question about theses settings in the FServer.

I can only set one username and password with one access level.

If I set a username and password with level 3 Guest acces  that I give to a customer for 'monitoring' the PLC, I should not be able to log as level 1 as administator for troubleshoooting and uploding updates?

The only way to bypass this is to set the Sw 3 then?

Is there also a way to protect from using this sw3? To avoid 'hackers' to try to steal the logic and having access to the local relays, timers, counters and so, even if the code will not be accessible?

Good day everyone,

I've set a EXP1616R to an FMD88-10 and I had problems to use input and output #9 to #16
but it's seems to start at #17.
I guess it's due to 16bits aligments.

I was using the SETSYSTEM 16,3 command to scan only the first 8x3 I/O and speedup the ladder loop.

Due to what i've noticed, I set SETSYSTEM 16,4 to scan the first 32 I/O, but on the EXP1616R the last Output (#32) was always closed even if it was not in the Ladder logic.

I've then set to SETSYSTEM 16,5 and it look like working well. Is it a normal behaviour?

Regards

Good day everyone,

I'm creating some rung to handle emergency hammer buttons. The idea is when the N.C. hammer button is hit, a relay keep the status (latch) and when the hammer button is resetted, a timer start to clear the error status and also a reset error request... the idea is to avoid removing the alarm directly.

The current logic is working fine up to the point when the timer reach 0 (elapsed reset time), the system is waiting a realise relay hit to clean the emergency.

when, under ITrilogi V6.47 I quickly hit the Stop_button_Rel (R71), it's going back in the timer waiting loop...
if I longer hit the Stop_button, then it's correcly clearing the alarm and working as expected.

I cannot explain why a short hit is not clearing the alarm and where it's happening in the ladder. Is it a ladder logic mistake? Where is the fault?

Description of the differents inputs/relay/timers

I1    : INPUT : Emergency_Butt ( N.C. circuit)
R72 : RELAY : Stop_Button_Ok ( Use to be N.C / N.O independant from the INPUT logic)
R70 : RELAY : Stop_Button (Latch that keep that an emergency event happend)
R71 : RELAY : Stop_Button_Rel (Request for cleaning the alarm (If the Stop_button_Ok is not ok, the R71 is opened)
R73 : RELAY : Stop_Button_Tim (Closed when the T2 timer is running)
T32 : TIMER : StopButtonDelay (Set to a amount of waiting time and activated when the physical alarm is cleared)