5/12/2017 10:18 AM | |
Posts: 33 Rating: (0) |
Hi All, I am trying to communicate a third party device for past some time using RS485 protocol. I have followed standard examples suggested by example programs but still unable to establish communication with the device. Independently the device has worked with a terminal on laptop by using RS 485.The command and response worked as shown in the device manual. SInce the command structure is correct, it should now work with CP 440 in principal. I am attaching my program and the screenshot where the command sent and response obtained have been shown. Please provide your comments and if i am committing any mistake. Regards, AttachmentDetails of communication settings.doc (150 Downloads) |
5/12/2017 12:50 PM | |
Posts: 33 Rating: (0) |
Hi, Yes I understand, I did toggled the REQ every time I wanted to communicate. But still I was unable to communicate with the device. Also I am getting EXT and INT fault LED glow in CP 440. please let me know if I am doing any mistake. I am attaching my program also AttachmentS7-400_M.zip (116 Downloads) |
5/12/2017 12:52 PM | |
Posts: 33 Rating: (0) |
Hi, After transmit I want to receive the data from device. To receive I have created another DB. please see the attached program for reference AttachmentS7-400_M.zip (118 Downloads) |
5/12/2017 1:14 PM | |
Posts: 33 Rating: (0) |
I am getting error in diagnostic buffer (some F008 error). Although I am following the suggestions of sample program, I am unable to communicate with third party device. I am attaching the program for your ref. Regards, AttachmentS7-400_M.zip (109 Downloads) |
5/12/2017 1:15 PM | |
Joined: 4/28/2015 Last visit: 2/7/2024 Posts: 10533 Rating: (820) |
??? |
With best regards... |
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