Why is the MOD_FLT of x80 DI/DO modules different between the local rack and the EIO rack?

When using the x80 DI/DO modules in a M580 application, a device DDT is created and it includes the WORD MOD_FLT. The value of the MOD_FLT is different if the module is inserted in a M580 local rack or in the ERIO rack.
The reason is that some exchanges between the CPU and the BMxCRA312x0 (Ethernet RIO Drop adapter) are done in the background to update the device DDT and these exchanges are not done in the local rack due to architecture constraints.
So, in order to get the correct value of the MOD_FLT for the local and ERIO rack, you should follow these steps:

1. Enable the "Allow dynamic arrays (ANY_ARRAY_XXX)" In EcoStruxure Control Expert. For a M580 Safety application, go on Tools-> Project Settings-> Scope: Process-> Variables and select "Allow dynamic arrays (ANY_ARRAY_XXX)". For a standard M580 application, go on Tools-> Project Settings-> Variables and select "Allow dynamic arrays (ANY_ARRAY_XXX)"
2. Create a new section with READ_STS_MX EFB and ADDMX EFB with the IP address of the M580CPU if the module is located in a local rack or the BMxCRA312x0

Additional information can be found in the page 368 of the "Modicon X80 Discrete Input/Output Modules User Manual".

Publicerad för: Schneider Electric Sverige