12/8/2015 3:14 PM | |
Posts: 3 Rating: (0) |
Hello, everyone. I'm developing a solution for controlling an air conditioning system using LOGOs and a S7-300. The LOGOs will monitor temperature and pression in the duct and will control the cold water valve. The whole project idea is to monitor and control many rooms in a building using a SCADA interface; the commands will be sent from the SCADA system to the LOGOs through S7-300 units. Right now, I'm working in the communication between LOGO and S7-300. I've managed to send and receive digital and analog values using the network inputs and outputs in LogoSoft Comfort. My problem is in programming the parameters of the "Weekly Timer". I've mapped the desired variables (week day 1, on time 1, off time 1) and configured these variables to receive data from specific DB in S7-300. Unfortunately this configuration is not working, the LOGO doesn't receive these values from the PLC. Could you guys help me? Maybe I've made some mistake in the network setup or in the format of the data that must be sent from S7-300 to LOGO. FYI, I'm using a S7-300 CPU317-2 PN/DP, LOGO 8 12/24RCE; LogoSoft Comfort V8 and TIA Portal V13. Thank you in advance! Kind regards, Rodrigo Lobo
Attachmentfiles_comm_logo_s7-300.zip (348 Downloads) |
12/10/2015 3:32 PM | |
Posts: 3 Rating: (0) |
Dear Helmut and collegues, 1) I checked the example, but it's a little bit different from what I need. The configuration of HMI and PLC for network connections are not exactly the same (e.g. the option 'Connectios' in HMI, which is not available in PLC configuration). 2) About the network, the S7-300 has IP 192.168.0.1, the Logo has IP 192.168.0.2, both have subnet 255.255.255.0 and gateway 192.168.0.20. 3) Yeah, checked the adresses in both devices, no problem there. 4) How do I exactly do that? 5) In TIA Portal I set TSAP 10.02 for S7-300 and 20.00 for Logo (unkwnon device in TIA Portal configuration). In LSC I set the same values in the network window. A curious fact here. I tested some network inputs/outputs in LSC, setting the network blocks to read the data from a remote device, indicating the type of device (S7-connection), IP, TSAP and adress of the remote input data (inthe case, DB bit adress). This communication works just fine! I managed to send and receive digital and analog data. But for this communication the LSC set a diferent TSAP for Logo8 - TSAP 21.00. I went to Logo's diagnostic screen in options and checked the status of the connections. The connection with TSAP 21.00 (network inputs/outputs only) was working fine. Pressing the ">" arrow for further connections we have a failed connection, with TSAP 20.00 and status disconnected (this one should send the data to set the weekly timer from the S7-300 to Logo). I really don't know what I'm doing wrong in the network configuration for this data transfer. (I posted all my files with my first post, but I'm uploading them again, just in case). 6) I didn't try that yet. Anyway, thanks for your help! Attachmentfiles_comm_logo_s7-300.zip (320 Downloads) |
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