Internet PLC Forum

Thanks Gary,

My original test was not to calculate the real 'reading time' and my description was faulty, but just to see if DM reading is faster than EEP reading... and we reached both the same conclusion...

It was to estimate what is the best solution for my code to get out of the code some message display and also prevent some modbus access to some value.. but it look that using EEP memory for calculation that are made at every ladder loop will slow down the ladder loop....
 In my current test by changing that, I go from 1000 ladder loops per second (more than 2000 on a most simple ladder login) to 600 ladder loops per second just by changing the DM variable by LOAD_EEP variable...
As far as my code is not yet fully done, it will slow down again and I try to stay over the 500 loops per second on average.

For 'human operation' it's still ok, but for electrical critical device.. it can be an issue.

Hello,

In the customs functions you have some TBASIC functions

SETIO relay/output-name           ' To set On the corresponding relay
CLRIO relay.output-name            ' To set Off the corresponding relay
TOGGLEIO relay/output-name     'To invert the current state of the corresponding relay (From ON to OFF  or OFF to On)

TESTIO (relay/output-name)      'To verify in an IF Statement.  function return 1 if the corresponding relay is ON and 0 if Off.

exemple:

IF TESTIO (RELAY1) = 0 THEN SETIO RELAY1 ENDIF         'Change the state of RELAY1 from 0 to 1

IF TESTIO (RELAY1) = 0 THEN TOGGLEIO RELAY1 ENDIF  'Change the state of RELAY1 from 0 to 1

In the I)Trilogy softwareinstallation you have a sample file that illustrate theses commands:

C:\TRILOGI\TL6\usr\Samples\setIO.PC6

Greettings all,

I getting lost with rising edge coil. As far as i've understood, when the coil is going from off to on, it execute the condition only one even if the conditions continue to be on.

In my example, is relay1 rise for off to on, it should execute once the Latch of itself.

and so the relay 1 should stay on due to the latch.

And that behaviour can be seen on the out2 and that's working fine...

but when applying that on the same relay it doesn't work and seems to work like a regular relay but not latch relay.

Can someone explain me why?

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

No, but anyway, I've discovered that the compiler need a constant as the last parameter so I cannot use a variable dat handle the frequency I need to generate.

Thanks for the reply... I wass in an hurry to buy the first PLC.... I should have been more patient!! (R78B) Lol

The Id behind was to use the second PLC to generate a Wind vane signal where the range is 5 to 500Hz.

I'm currently using a 0.01s coil and a counter but I reach 100Hz max

I tried with the INTDEF 18, but the problem is that I can put only one function linked, or I got 2 output with differents frequency to  play with.

On my old version, the PWM can then be any frequency between 50 and 50000 Hz?

Or is there another way to reach that goal?

And the result of the display

I'm trying to display the current firmware version of the FMD88-10 PLC with this function
Status(5) but everytime it's returning 0.

I've tried on a 78B and 81 firmware version of PLC and both are returning 0

Am I doing something wrong?

Regards