Pablo, Try playing with the driver scan rate, slower and faster. See what difference it makes, if any. Are you using an xml device config file ? Regards, Scott ________________________________________ From: foxboro-bounce@xxxxxxxxxxxxx [foxboro-bounce@xxxxxxxxxxxxx] On Behalf Of Pablo Lioi [plioi@xxxxxxxxxxx] Sent: Thursday, March 12, 2015 5:10 AM To: foxboro@xxxxxxxxxxxxx Subject: Re: [foxboro] FBM230/Modbus slave too fast problem I'm using RTU, but my communication is not a radio link. The FBM230 and the slave are inside the same cabinet. > From: dmarc-noreply@xxxxxxxxxxxxx > Subject: Re: [foxboro] FBM230/Modbus slave too fast problem > Date: Wed, 11 Mar 2015 15:18:10 -0400 > To: foxboro@xxxxxxxxxxxxx > > Are you using Modbus rtu or ASCII? On radio units I have had better luck with > Modbus ASCII. > > Sent from my iPhone > > > On Mar 11, 2015, at 1:28 PM, Pablo Lioi <plioi@xxxxxxxxxxx> wrote: > > > > Hi everybody, > > I'm sending this again because for some reason carriage returns seem to > > have been lost and the post was difficult to read. > > In the past I had a serious problem with an FBM230 with Modbus protocol > > communicating with a slave using RS-232, in RTU mode. > > When the slave response to any query from the master arrived too fast, the > > FBM would ignore the response and retry. I finally worked around the > > problem delaying the response from the slave a few milliseconds using a > > setting (at the slave device) that was meant for radio communication (RTS > > to TxD delay). > > I am now facing the same problem again, with another slave device. The > > problem is that this time I have no way to delay the slave response. I > > tried using RTS/CTS handshake on the RS-232 line, but the problem remains. > > I know for sure that cable and switch settings at the TA are ok because I'm > > looking at the line with a protocol analyser and see correct query and > > response messages.I would like to know if somebody else has experienced > > this problem too. > > Regards > > Pablo Lioi > > TOTAL AUSTRAL S.A. > > Tierra del Fuego - Argentina > > > > > > > > _______________________________________________________________________ > > This mailing list is neither sponsored nor endorsed by Invensys Process > > Systems (formerly The Foxboro Company). Use the info you obtain here at > > your own risks. Read http://www.thecassandraproject.org/disclaimer.html > > > > foxboro mailing list: //www.freelists.org/list/foxboro > > to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join > > to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave > > > > > _______________________________________________________________________ > This mailing list is neither sponsored nor endorsed by Invensys Process > Systems (formerly The Foxboro Company). Use the info you obtain here at > your own risks. Read http://www.thecassandraproject.org/disclaimer.html > > foxboro mailing list: //www.freelists.org/list/foxboro > to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join > to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave > _______________________________________________________________________ This mailing list is neither sponsored nor endorsed by Invensys Process Systems (formerly The Foxboro Company). Use the info you obtain here at your own risks. Read http://www.thecassandraproject.org/disclaimer.html foxboro mailing list: //www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. ______________________________________________________________________ *** Confidentiality Notice: This e-mail, including any associated or attached files, is intended solely for the individual or entity to which it is addressed. This e-mail is confidential and may well also be legally privileged. If you have received it in error, you are on notice of its status. Please notify the sender immediately by reply e-mail and then delete this message from your system. Please do not copy it or use it for any purposes, or disclose its contents to any other person. _______________________________________________________________________ This mailing list is neither sponsored nor endorsed by Invensys Process Systems (formerly The Foxboro Company). Use the info you obtain here at your own risks. Read http://www.thecassandraproject.org/disclaimer.html foxboro mailing list: //www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave