.... While looking for more Infos I found out I once wrote a tutorial page for PLC4X __
https://plc4x.apache.org/users/plc4j/virtual-modbus.html I so totally hate searching the web and getting my answers answered by myself. Chris Am 15.07.20, 08:31 schrieb "Christofer Dutz" <christofer.d...@c-ware.de>: Hi Niclas, when preparing a workshop for the Building IoT we were looking for something where you could simulate a Modbus Slave. Most of these were Windows only solutions, so ModbusPAL was one of the very few solutions that were pure-java. Don't quite understand what the thing with the offset is however ... should be easy to fix ... I mean if I say address 42 in PLC4X, Wireshark says 42, but in Modbus Pal I think it has to be 43 ... don't quite get it. Chris Am 15.07.20, 03:54 schrieb "Niclas Hedhman" <nic...@hedhman.org>: What is ModbusPAL? The 1-offset in Modbus has caused a lot of confusion over the years. On Tue, Jul 14, 2020 at 11:03 PM Christofer Dutz <christofer.d...@c-ware.de> wrote: > Sorry for the noise ... > > this was a false positive ... the driver was doing things correctly. > It seems the ModbusPAL was just off by one ;-) > > Chris > > > > Am 14.07.20, 15:51 schrieb "Christofer Dutz (Jira)" <j...@apache.org>: > > Christofer Dutz created PLC4X-214: > ------------------------------------- > > Summary: [Modbus] Holding register addresses have an > offset of 1 (Not reading the correct address) > Key: PLC4X-214 > URL: https://issues.apache.org/jira/browse/PLC4X-214 > Project: Apache PLC4X > Issue Type: Bug > Components: Driver-Modbus > Affects Versions: 0.7.0 > Reporter: Christofer Dutz > Assignee: Christofer Dutz > Fix For: 0.8.0 > > > If I set holding the following holding registers to: > > 1000: 41 > 1001: 42 > 1002: 43 > > And then read: holding-register:1001 ... I get the value 43 returned. > > > > -- > This message was sent by Atlassian Jira > (v8.3.4#803005) > >
