7/28/2016 6:08 AM | |
Posts: 11 Rating: (0) |
Dear All, Currently I am facing the same problem. Below is my hardware: CPU 315F-2 PN/DP ; 6ES7 315-2FJ14-0AB0 V3.2 CP 341 RS422/485_1 ; 6ES7 341-1CH02-0AE0 V2.0, include modbus slave dongle. Safety DI, DO and AO Software TIA Portal V12 Sp1 I want to communicate with 3rd party device using modbus RS485. My PLC will act as modbus slave using CP341. No error and warning after compiling the program. But I found error status at Modbus Slave block it is "16#8280" = An error description says "Negative acknowledgment when reading module". (as per attached) Also I cannot find HW_ID for my CP341 at PLC_Tag system constant . I confused what I have to do, Please help me. Your fast response is much appreciated. Thank you,
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Last edited by: Min_Moderator at: 7/29/2016 11:02:00 AMNew subject after splitting |
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7/29/2016 8:01 PM | |
Posts: 11 Rating: (0) |
Dear All expert, Please find below my update screen shoot |
7/29/2016 8:30 PM | |
Posts: 11 Rating: (0) |
Dear All, I also cannot find the "ID of the communications port" at PLC Tag and Hw_Cfg also not found |
7/29/2016 8:32 PM | |
Posts: 11 Rating: (0) |
Additional info: I open online diagnostic and got this info: CP341 V2.1.6 6ES7 341-1CH02-0AE0 Please help me....... |
7/30/2016 10:21 AM | |
Posts: 11 Rating: (0) |
Hi Duris, Thanks for your answer. I am already follow your advice and attached the result. It is error 8186 = "Invalid Modbus station address" Thank you, |
7/30/2016 1:18 PM | |
Posts: 11 Rating: (0) |
Hi Duris, Oh...I see, Thank you. After changed here is the result |
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