RTD Module( 6ES7331-7PF01-0AB0) not getting detect in hardware

Hello All,

We are using S7 400 PLC (cpu 416-2 DP) in our plant.we are now require to install some RTDs in filed. For that we are using RTD module (6ES7 331-7PF01-0AB0) in RIO which has IM 153-1 (6ES 7153-1AA03-0XB0). We made hardware chages in PLC program and added two RTD modules in RIO's slot 10,11 and downloaded hardware in PLC which is downloaded ok without error.But when we online hardware then we are not able to detect these two RTD modules. while checking IM module diagnostic following message we found:

"Module available and ok"

I 640 Module configured. but not available.

I 656 Module configured. but not available.

 We chcked 24Vdc volatge at RTD's module terminal 21 & 40 which found ok. On dougth bases also connect brand new Active backplane( which is already tested and working ok) in Rack. for more refence attaching Word file in which two images are there 1) Online hardware 2) IM diagnostic.

Please sugget next what we can check to detec RDTs module.

Hello,

1. Please check that the module power feeding is connected in according to its datasheet.
2. Please check that the PII of the CPU covering the addresses of the two AI modules.
   To do it, Go to HW config, Double click on the CPU and go to "Cycle/Clock Memory" tab, then tell us what did you found in field of "Size of the process image input area".

Ayman Elotaify

Hello,

1. Please check that the module power feeding is connected in according to its datasheet.
2. Please check that the PII of the CPU covering the addresses of the two AI modules.
   To do it, Go to HW config, Double click on the CPU and go to "Cycle/Clock Memory" tab, then tell us what did you found in field of "Size of the process image input area".

 Hello Ayman Elotaify,

Thanks for your quick response .

For your 1) point I do not understand what to do?  Can you please explain in detail for this point

2) point I am attaching image . "Size of the process image input area": 512 

What is this size means? Don't have detail knowledge of it.

sparten

 

Ayman Elotaify

Hello,

1. Please check that the module power feeding is connected in according to its datasheet.
2. Please check that the PII of the CPU covering the addresses of the two AI modules.
   To do it, Go to HW config, Double click on the CPU and go to "Cycle/Clock Memory" tab, then tell us what did you found in field of "Size of the process image input area".

 Hello Ayman Elotaify,

Thanks for your quick response .

For your 1) point I do not understand what to do?  Can you please explain in detail for this point

2) point I am attaching image . "Size of the process image input area": 512 

What is this size means? Don't have detail knowledge of it.

 Hello,

First, I would like to tellexactly as Daniel Chartier told you that we have little info about your problem and to solve it or to know the reason quickly, you have to go online and see the diagnostic buffer.

___________

For your 1st question, I meant that you have to be sure that the modules are powered accoding to their data sheets. Please see the module data sheet in module data manual which you can download from the following link.

 https://support.industry.siemens.com/cs/us/en/view/8859629

For Process image, You should re-address your modules to make the end byte of your modules is bellow or equal to 512 if you would like to address inputs in SW using IWxxx or otherwize, you should use PIWxxx without re-addressing.

Hope this helps.