BF2 LED steady flash on IM157

Hi all,

I also have same issue with SF LED on BUSF steady flash CPU and SF  LED on, BF2 LED steady flash on IM157. I know the problem is being caused by our Fairbanks 2560 scale that has a Diamond DT7000 I/O card with anybus profibus DP V1 module.  This is a new scale and it has never been able to connect to profibus. We had Fairbanks tech out a few times and he stated that the anybus profibus  module is set to 115200 baud rate and it can not be changed. I am fairly new to profibus system. 

1. how can I find baud rates?

2. Are any of you familar with DT7000 /anybus products?

3. any other suggestions to fix issue would be helpful.

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Split from cpu 315-2DP only SF and BF LED Flashing..

Hello cryptoguy;

My first suggestion would be to provide us with a clear screenshot of what you would like us to see, the camera picture you show is unintelligible, blurry and out of focus. 

My first suggestion would be to contest the findings of that Fairbanls tech team, there are fundamentals of Profibus-DP that they do not understand. Standard Profibus speeds go up to 12 MB (in older models it might be slimited to 1,5 MB), and will vary with the length of the Profibus segments.A bus speed of 115200 baud sound more like a serial translmission speed, for protocols such as Modbus RTU.

Both the manuals of the Fairbanks 2560 scale eand the Anybus-S ^rpbus DP-V1 gateway state that they do not operate at 1152900 baud on Profibus, see the screenshot below.

https://nicolscales.com/wp-content/uploads/2011/10/FB2560-Manual.pdf

https://www.anybus.com/docs/librariesprovider7/default-document-library/manuals-design-guides/hms-scm-1204-137.pdf

What is confusing in the description you have is the DT7000, which claims to support Profibus, but only mentions Modbus RTU in their Communication I/O gateway manual:

"The following notes apply to the native MODBUS interface:  The default parameters for the native serial ports are 115200,N,8,1, and can be set through the diagnostics port."

http://www.diamondt.com/wp-content/uploads/2014/01/DT7000_GatewayUsersGuide_Rev2_61.pdf

Maybe you can clear at least one issue up on the DT7000: If you can get us the complete part number of the unit installed in the Fairbanks scale, maybe we could see what you actually are able to connect to:

"Example:

DT7000A1-PB-A: DT7000 with 4 serial channels, 16 sourcing inputs/outputs, Profibus support with 12 analog  inputs/outputs (0-10VDC)" From the DT7000 Programmable Gateway I/O webpage,

https://www.diamondt.com/products/industrial-io-and-controllers/embedded-board-level-io/dt7000-programmable-io/

Hope ths helps,

Daniel Chartier

Thanks for your reply/input,

I have read through the material on DT 7000, it does state it does support prifibus but it does not give any information as how to configure it for such. I did call Diamond Tech about changing baud rate on there device. They said that it was probably programmed in by the end user. (Fairbanks scale in this case) Fairbanks is not very responsive with tech support. At this point any thing would be better that using the DT 7000 I/O. I did come across Anybus communicator that would illiminate the DT 7000 and anybus profibus module. From what I can tell it would take the RS 232 and convert it to profibus. The Fairbanks scale uses RS 232 to communicate with the DT7000. I could insert the anybus communicator in place of the DT7000.

What are any thought of going that route?

https://www.anybus.com/images/librariesprovider7/products/gateways/anybus-communicator-versions/anybus-communicator---profibus.jpg?sfvrsn=489ddd6_22

Hello cryptoguy;

Before we can make any suggestions, we need to know what modules exactly are  connected to your Fauirbanks scale, and wat their roles are. 

The doubt comes from this quote from the DT7000 manual suggested ear;lier:

"3.0 Communications

The DT7000 provides communications through 4 serial ports. The serial ports can be configured for various functions including Diagnostic port, MODBUS slave, MODBUS master, MODBUS route port, Generic serial driver, or custom protocol.

The Anybus CompactCom module provides connectivity to any of the available fieldbus protocols. As a slave I/O device to a PLC or host computer, any of the fieldbus protocols can be used, as supported by the host."

As described, the DT7000 acts as  a gateway from the scale to Modbus RTU, on a serial connection at 115200 bauds,, and the the Anybus gateway interfaces the registers of the DT7000 to Profibus for connection with your IM 157 (By thre way, could that be a IM 151-7?) .That seems to be a needlessly complex connection structure, with many possible points of failure.

For the moment, we will need to presume (I hate that word!) that the scale and the DT7000 are correctly configured, and that the issue is in the Profibus connection with the Anybus gateway. So let us start with the diagnostics of your CPU, to determine why the BF2 LED is active.

We therefore need you to provide us with the messages logged in the CPU's diagnostic buffer. Open the buffer, and click on the Save As,, button you will find on that screen. This will generate a text file you can attach to your next reply on the forum. Do not send a camera picture, your first attempt was not useful, and the text file contains more information than is available in the main diagnostic buffer page.

When we have that we can start examining what the CPU is complaining about. If you would like to examine the buffer messages, faults linked to Profibus (in the diagnostic buffer) will request OB 86 (remote rack failure), possibly OB 122 (programming error). These are diagnostic OBs that will be called by the operating system of your CPU when it detects specific type of errors in runtime.

Let's start with that for the moment. If you are not familiar with S7 PLCs, the following video will show you how to open and use the diagnostic buffer for s7-300 family CPUs.

https://www.youtube.com/watch?v=FEBlbLrRS1A

Hope this helps,

Daniel Chartier

Hello,

sry only for attention, after any upload of images check it back to be sure all is visible. Your picture isn't readable, sry.

hello,

Here is the diagnostic info you requested. I also replaced the profibus connector on scale side with a new helmholz 700-972-7BB50 with indicating LED's  Blue -station transmitting, it is not on. Green-Bus traffic active, it is flashing. Orange-Terminating resistor is switched on.  it is on . The scale is the only device on this cable direct from IM 157, it is on the A2 B2 portion of the connector. Would turning on the terminating resistor on this connector do anything? The A1 B1 portion of this connector is going directly to the A1 B1 connector on CPU 312-2 DP.

Also the LED 's  (OP) (ST) on the profibus DP-V1 anybus module mounted to the DT7000 board are not lit. Im fairly certain problem is DT7000 or anybus module not set up correctly. Fairbanks tech support is not very responsive or useful. The last guy who was out didnt seem very knowledgeable. I came into this problem when i started her about 3 months ago, so its not like urgent. but I would like to resolve it

Thanks

Hello,

very sry, I see some not correct infos or some missunderstandings. From complete this topic I see different mixed infos about existing HWs. Can you pls draw simple diagram about devices connected with some description of cable and protocol (Profibus, address of device, speed configured,...)? You can also do better screenshots from HW cfg and maybe existing gateway there with cfg screens inside its options, ZIP them and attach ZIP with your next comments. Very sry, from your info is clear to me that you are also not sure what is there with HW cfg exactly. You mention scale is connected with PB connectors but from gateway manual is somehow clear that Modbus RTU is expected there, on serial to scale side, only Profibus from Master 315-2DP CPU to gateway, simply I imagine this from posts here. I think (respect with Daniel's posts already here) you need to do better again better description of existinmg things and then we can maybe better look at problems. Your diagnostic HW looks to me not helpful, maybe point to some HW cfg error or some partner device not correctly configured with respect of existing S7 cfg... 

Hi,

Im new to profibus and using S7 software. Thanks for your patients.

I attached jpg of the scale and the DT7000 with anybus module. The 3 wires labeled 30828 are attached to the DT7000 B232 connector and go to the PCB on the FB 2560 scale.  The PD cable goes from the anybus module directly to the IM 157 (A2,B2 side of the connector). The A1 B1 side goes to the CPU 315-2 DP. In the HW cnfg diagnostics it shows (40) ANYBUS-S PDP. I believe that is address 40. I am not sure how to check the speed.

All, Update on same problem. 

I opened the  HW config - [SIMATIC 300 (2) (Diagnostics) ONLINE]

-Module Information- ANYBUS-S PDP.

-under the general tab

DP master system: 1         Address I 1015

station:                    40

Status: Module not available (I/O access error or parameter assignment error)

DP Slave diagnostics tab:

Master Address:       - - -           Manufactures ID      16#0D02

Standard Diagnosis of the slave:

    DP slave not ready yet for data exchange

    Incorrect parameter message frame

    Parameters must be assigned to the DP slave again

Module Information - IM 157

General Tab

Version:         Order No. / Description        Component                   Version    

                      6ES715?-?????0X?0           - - -                                 - - -

Staus:            Failed.   

DP Slave Diagnostics Tab

Master Address:      2               Manufactures ID               16#8052

Standard Diagnostics of the Slave:

   Slave specific diagnostic data

   Watchdog activated

    User data: inputs are read, outputs are written

    Slave with address 4 failed.