SIMOCODE/SIMOVERT Communication to Yokogawa CS-3000

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Thread Starter

Mohamed

How can the communication between simocode/simovert and ALP111(Profibus commn. module of DCS) be checked other than std. decoding techniques from DCS vendor?

DCS functions as the master and gives certain Error messages when the communication fails. Is there any 3rd party tool s/w available in the market to pinpoint the type of failure in commn. from a particular slave?
 
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Jesus Carrero Blanco

Hello,

The ALP111 give you enougth error codes in the Alarming system messages on CENTUM. With the error code you can check what is the meanning of the error. For example "CA91" or "CABA".

You can use SyCon by Hillsher to get advance diagnostics. The same that you use to define the Profibus network topology. Also the SIMATIC fro Siemens can help you a little bit.

TIP: Deactivate the DPV1 setting on the ALP111 master and test.

Thanks.

Jesus Carrero Blanco
 
Most intermittent Half Duplex COM errors are either associated with RS485 GND issues OR Timing issues. The timing issues are either the Slave "Turnaround Time" where the Slave is too quick in starting its response and must be delayed by increased Turnaround Time. Or, on the other hand, the Host "Response Timeout" is set too close to its Timeout limit and the Slave response sometimes does not finish in time before the Host Timeout occurs.

RS485 is a 3 wire communications medium, A, B and GND. The grounds of the TX and RX driver/receiver must be referenced to each other such that the Common Mode voltage of A and B must never exceed +12V or -7V. The other useful RS485 trick is to introduce "Fail Save Biasing", see National Semiconductor Application Note "AN1057", last page. Fail safe biasing ensures that all RS485 receivers are turned OFF when no device is transmitting.
 
If the moderators allow this to post, I have a freeware WIN32 Console application that will monitor RS232 or RS485 Half Duplex communications using a LapTop with 1 COM Port. I am the author of the application and I use Diode Auctioneering to monitor the 2 data streams in RS232 OR directly connect to one side of the RS485 signal and feed it into one RS232 Rx of the Win PC. Half Duplex is a Poll/Response protocol, like Modbus, where no two devices are transmitting at the same time. Poll/Response separation is accomplished by variable timers at selected baud rates. Contact me at [email protected] for a free copy.
 
Hello,

We are getting miscellaneous dropouts on our CS3000 Profibus Segments. In System Status of CS we see the Profibus card go RED and IOM Failure Occurs in System Alarm Messages. Within 30 Seconds the Card will recover and go back green. System Alarm just shows recover. We are talking to Siemens Simocodes. Here are some errors that we recently saw:

2009/07/02 00:33:00 -07:00,BFFB:MPDVS:SALM,3303,530532834,,1972/01/05 07:53:37.024 -08:00,,0:0:0,FCS0206,,,FCS0206 PB FIO 01 NODE 02 SLOT 07 Device Related Alarm STN 004 ID 0x80FD CODE= 148101000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
2009/07/02 00:33:00 -07:00,BFFB:MPDVS:SALM,3303,530532835,,1972/01/05 07:54:38.464 -08:00,,0:0:0,FCS0206,,,FCS0206 PB FIO 01 NODE 02 SLOT 07 Device Related Alarm STN 015 ID 0x80FD CODE= 148101000000000000000000000000200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
2009/07/02 00:33:00 -07:00,BFFB:MPDVS:SALM,3303,530532836,,1972/01/05 07:55:39.904 -08:00,,0:0:0,FCS0206,,,FCS0206 PB FIO 01 NODE 02 SLOT 07 Device Related Alarm STN 017 ID 0x80FD CODE= 148101000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
2009/07/02 00:33:00 -07:00,BFFB:MPDVS:SALM,3303,530532837,,1972/01/05 07:56:41.344 -08:00,,0:0:0,FCS0206,,,FCS0206 PB FIO 01 NODE 02 SLOT 07 Device Related Alarm STN 018 ID 0x80FD CODE= 148101000000000000000000000000080000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
2009/07/02 00:33:00 -07:00,BSYS:MFCS:SRCV,0082,530532838,,2009/07/02 00:33:00.050 -07:00,,0:0:0,FCS0206,,,FCS0206 IOM Recover FIO1 NODE 02 SLOT 07

>TIP: Deactivate the DPV1 setting on the ALP111 master and test. <

This is deselected!

Thanks.
Aaron Sullivan
 
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