Rating 
Thanks 1
3 Entries
| 5/18/2016 9:14 PM | |
|
Posts: 106 Rating:
|
Hi guys. Today I have made a OPC server connection to the PLC1 (CPU 315F-2PN/DP) and it works fine. The problem is that PLC1 have to communicate with PLC2,PLC3,PLC4,PLC5,PLC6 and PLC7 using S7 connections configured in the device and networks (TIA portal). All of the CPUs are of the same type. Used functions are SEND s7 and RECV s7 (Safety functions), but the PLC1 sends data to all of the PLCs and receive data just from PLC2 and PLC3. All of the functions are the same, and used the same way. Could this be because of the S7 connection resources? CPU315 can have 8 connections but in the project I have an HMI that has a HMI connection and 6 PLCs of which PLC1 sends the data succesfully to all of them (6 S7 connections) and receives succesfully from two of them (2 S7 connections). 6+2=8 and that is the maximum? I need to figure out how all of the PLCs can send data to the PLC1. https://support.industry.siemens.com/cs/mdm/12996906?lc=en-WW&dl=en page 85, CPU315-2PN/DP-> 8 connections or there may be some other reason why PLC1 can't get the data from other PLCs? In the SEND function of the PLC4,PLC5,PLC6,PLC7 (the PLCs that can't send the data to the PLC1) the ERROR is true but the ACK_REQ is false. |
Last edited by: Min_Moderator at: 5/19/2016 2:53:32 PMReplace link |
|
| 5/19/2016 10:59 AM | |
Joined: 3/5/2014 Last visit: 8/5/2022 Posts: 5521 Rating:
|
hi dolbyinside, for Number of connections I always look in the technical data of the specific PLC. I your case the 6ES7315-2FJ14-0AB0, I guess this is the rigth. Number of connections
As you can see, you have more connections than 8. In the manual is the 315-2PN/DP, not the F-CPU, like yours, you also can send and receive from one connection. Everytime you use a connection to send or receive, a instance of the connection is used. hope this helps, regards, |
Last edited by: mopS04 at: 5/19/2016 11:02:52 AMFCK WAR! |
|
This contribution was helpful to
|
|
Follow us on