Hi! I'm now in a project which collecting weighing data of 3 tanks to S7-1214C and transfering them to S7-314 2PN/DP through ethernet cable. My problem is it took me about 1 second to exchange data (about 13 bytes) between S7-1214C and S7-314 using PUT and GET. So the weighing data updated quite slow to S7-314. Is there any way to exchange data faster between S7-300 and S7-1214 ? 

 For more information, I use clock memory 1Hz to trigger the REG parameter of  FB PUT/GET. I couldn't set the lower cyclic time because the FB would have error with status 25 (meaning the FB in progressing).

hi viking,

Does it take 1 Second from requesting the Put to the Time the Data are updated? Or do you mean that your values are updated only every second?

If you want it faster, you maybe have the possibility to establish an I-Device communication. Then it will be updated every cycle and you don´t have to use communication blocks. But your PLC´s have to support I-Device-functionality. What Firmware or MLFB do the S7-1214 have?

hope this helps

mopS04

hi viking,

Does it take 1 Second from requesting the Put to the Time the Data are updated? Or do you mean that your values are updated only every second?

If you want it faster, you maybe have the possibility to establish an I-Device communication. Then it will be updated every cycle and you don´t have to use communication blocks. But your PLC´s have to support I-Device-functionality. What Firmware or MLFB do the S7-1214 have?

hope this helps

 Hi mopS04,

Thank for ur reply.

I put a FB Get in PLC S7-314 to get a data block about 13 bytes. in REG parameter of FB GET, I put a Clock memory 1Hz to trigger FB. I cannot set the clock more than 1Hz because it will cause error of FB GET (error status 25).

S7-1200 firmware is 4.1. Do u have any sample or document about establish I-Device communication between S7-300 and S7-1200? 

HI Viking_09,

your S7-1200 supports the I-Device function so I would advise you using it.

An example you find here

https://support.industry.siemens.com/cs/de/en/view/109478798

Hi all,

I did configure connection I-device between S7-314 and S7-1214 in TIA Portal V13 SP1. It works ok, but these are some problems:

- Both PLC will error at the power-up: I connect 2 PLC on the same power-line. At the power-up, the S7-1214 flash the Led "ERROR" and the Led "RUN\STOP" is still GREEN, the message in Online and Diagnostics is IO-Device failure. In the S7-314, the Led "SF" turns to RED and PLC switches to stop. When I stop S7-314 and run it again, the connection will be normal.

- If the connection is normal, then I unplug the ethernet cable, the above error will appear.

- If the connection is normal, then I stop the S7-1214 then run again, this error will happen again.

Anyone can give me some advice??