M172 Task Configuration - 'Init' is not executed on download

[obscuresc]

Hi all,

Task configuration for EcoStruxure Machine Expert HVAC (v1.5.0) says the following;

It seems that 'init' category tasks do not run on download of application, rather just start as a second stage of 'boot'.

I checked this using the following setup;

'Init' program

Spoiler

IF NOT xBootRunsFirst THEN;

xInitRunsFirst := TRUE;

END_IF;

uiRet := sysWriteParINT(ADR(E2_iNumInits), E2_iNumInits + 1);

'Boot' program

Spoiler

IF NOT xInitRunsFirst THEN;

xBootRunsFirst := TRUE;

END_IF;

uiRet := sysWriteParINT(ADR(E2_iNumBoots), E2_iNumBoots + 1);

Where E2 are EEPROM vars, and other vars are in global scope.

On a 'Download All' including setting default values;

Spoiler

On first boot; number of inits = 1, number of boots = 1, and the boot program runs first
On second boot (using Reboot Target); number of inits = 2, number of boots = 2, and the boot program runs first

On a 'Download All' without downloading default parameter values (immediately after first test);

Spoiler

Number of inits = 3, number of boots = 3, and boot program runs first

On a 'Download PLC Code';

Spoiler

Number of inits = 3, number of boots = 3, and boot program runs first

Tested physically using TM172PDG18R.

Could this be resolved?

Thanks,

Jack

[FedericoM]

Hello,

at boot the M172 executes boot and then Init once and then starts with Timed & Background.

When you download just the plc code from programming, M172 applies an hot swap whenever the plc changes does not require a plc restart. So in this case the boot&init are not executed and PLC will swap from old to new application.

In case a download requires a warm/cold restart, it will execute also the init task (a popup opens in case a warm/cold restart is applied). 

A recompile all command force a cold restart after next download 

[obscuresc]

So whenever a 'boot' task is called, an 'init' task is also called? This is a little unclear in the documentation image I have above.